Contents of: V/73A/./remarks.dat

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## (from tabmap V6.0 (2016-08-18)) 2024-05-07T14:32:25
#---------------------------------------------------------------------------
#-- V/73A Emission-Line Stars of the Orion Population (Herbig+ 1988)
#--------------------------------------------------------------------------
#---Table: V/73A/./remarks.dat Remarks  (591 records)
#       HBC I4     ---   object HBC identification
#      Cont A1     ---   [a-g] Non-blank when several lines.
#   reftext A121   ---   remark text
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    |C|
    |o|
    |n|
 HBC|t|reftext
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 324| |MC 1       .    The position listed in the catalog (0 04 33.84 +65 22 32.2) corresponds to a nearby star MacC A.
 324| |   The position was corrected on 06-Jan-2008 at CDS (thanks to Tigran Yu. Magakian, Byurakan Obs., Armenia).
   3| |V633 Cas   .    The spectral type is uncertain.  Infrared observations are in [2,3,32,71,82,91,316].
 329|a|VX Cas     .    There was some uncertainty in the identification of this star in the earlier literature.  The coordinates
 329|b|   and other data in Table 1 refer to the star indicated as VX Cas in Aarhus Medd. no. 10, 150 (1937), Kasan Bull.
 329|c|   26 (1951), Bull.A.F.O.E.V. 6, 93 (1937), Perem.Zvzd. 22, 9 (1983).  It may be an Ae/Be star although there is no
 329|d|   bright nebulosity nearby.
 330|a|V594 Cas   .    The absorption spectrum is confused by line emission; the types assigned range from O9.5 to B8,9:
 330|b|   see [138].
   7| |LkH@ 201   .    This is probably a background Be star.
 334|a|RNO 6      .    The photometry is of the star in the brighter lobe of this reflection nebulosity.  A polarization
 334|b|   map is in [420].
   8|a|LkH@ 262   .    LkH@ 262, 263 are separated by about 15" in 22# .  They and LkH@ 264 lie in L1457, but are not to be
   8|b|   identified with the X-ray source in that cloud found by Halpern and Patterson, Ap.J. Lett. 312, L31, 1987.
   9|a|LkH@ 263   .    (See remark for LkH@ 262.)
 336|a|IRAS 0313  .    This nebulous star was observed at the request of Iyengar.  An underexposed Lick coude spectrogram in
 336|b|   1986 showed only strong double H@ emission (R>V) on a weak continuous spectrum.
 338|a| LZK 4     .    A 1983 Lick coude spectrogram of the red region shows an unusually broad, structured H@ emission with
 338|b|   a reversal displaced somewhat shortward of center.  A few weak absorption lines are present, and the D lines are
 338|c|   fairly strong, but Li I 6707 is not apparent.  The type was classified as mid-K by [118a].
 346|a|SSV 13     .    No stellar absorption spectrum can be seen with certainty; H@, [O I] and [S II] are very strong, as in
 346|b|   H-H Objects [160].
 348|a|IP Per     .    It is not certain if this is a pre-main sequence star.  Two Lick coude spectrograms (1973, 1981)
 348|b|   showed strong, structureless H@ emission upon broad, stellar absorption wings.  The only other stellar features
 348|c|   present were broad Na I D lines.
  20| |LkH@ 330   .    The spectral type is not well determined; a Lick coude spectrogram was classified as "about F6".
 349|a|XY Per e   .    The star illuminates a large reflection nebula.  XY Per is ADS 2788; coordinates and photometry refer
 349|b|   to the combined light.  There has been no change in the relative position since 1904; the mean separation is
 349|c|   1".35, p.a. 75#.  The photometric range is so large that both components must be variable; the magnitude
 349|d|   differences noted by the double star observers can account for only a fraction of the amplitude [47].  The
 349|e|   eastern star (B) was the fainter at all the Lick observations (1961-73).  It was earlier classified as B6,
 349|f|   but superior modern material indicates middle A in the blue, but late B in the red.  The v sin i quoted is
 349|g|   from the metallic spectrum.  There are fairly strong, double emission cores in the H@ absorption line.
 350|a|XY Per w   .    The western star (A) has a peculiar spectrum.  Originally called A2 II (Herbig 1952), modern coude
 350|b|   spectrograms show sharp, double core structure in Ca II K and the higher Balmer lines; this structure is
 350|c|   variable with time.  The Fe I lines are the widest species (v sin i = 120-140 km/s), and suggest a type of
 350|d|   A2 or A5.  Lines of Fe II and Ti II are narrower and strong; Ti II 3685, 3759, 3761 are prominent, as in
 350|e|   shell spectra.  Broad central emission, divided by a central reversal, is present in H@.  Weak, broad He I
 350|f|   absorption lines suggest a late B type.
 355|a|NTTS 035135.    Weak emission cores are present in the H,K lines but H@ is absent, presumably being filled-in to the
 355|b|   level of the continuum.
 356|a|NTTS 040012.    NTTS 040012+2545N and S are separated by about 1".  The coordinates, photometry etc. are for the combined
 356|b|   light.  The Li I 6707 is observed in the combined spectrum.
 357| |NTTS 040012.    (See remark for preceding star.)
 363|a|PP 13 s    .    The s, brighter lobe shows a scattered M-type spectrum with prominent [O I], [S II] but no H@.  The
 363|b|   illumination is from a heavily obscured infrared source near the ne edge.  The n lobe is nearly stellar, and has a
 363|c|   T Tauri-like spectrum.  The coordinates in both cases refer to the infrared peaks.  Note this is PP 13, not Par 13.
 364| |PP 13 n    .    (See remark for preceding entry.)
 365|a|LkCa 1     .    The radial velocitites of both [212] and [192] are well off that expected for a star associated with the
 365|b|   Taurus clouds.
 366|a|Anon 1     .    This is the "nebulous star 11' in 300  from HD 283447" of [212].  It is identified on the chart for
 366|b|   LkCa-1 in [219].
 367| |V773 Tau   .    According to [408], there is a cyclic variation of 10.62-10.76 (in V) with period 3.43 days.
  25|a|CW Tau     .    The radial velocity value quoted is from [189], but the velocity may be variable [123].  The [O I],
  25|b|   [S II] lines are unusually strong.  The spectrum is discussed or reproduced in [93,123,404,458,500].
 369|a|FO Tau     .    This is the star 2 mm north, 22 mm east of HD 283447 on the chart for the latter star in [410]; it is
 369|b|   also identified in [257].  The identity with the Haro s6-2 of [93] was confirmed by M. Cohen.
  29|a|V410 Tau   .    Additional UBVRI observations are in [220,236,390,410]. A cyclic variation 10.82-11.04 (in V) with
  29|b|   period 1.92 days is present [408].  The radio source at the star is variable: [34,96,101,305].
 373|a|Elias 1    .    This is the star 6 mm north, 5.5 mm east of CZ Tau on the chart for that star in [410]; it is also
 373|b|   identified in [93].  It was discovered originally as an infrared source by D. A. Allen (private comm.).
 374|a|Hubble 4   .    This is the nebulous star 9 mm north, 9 mm east of CZ Tau on the chart for that star in [410]; it is
 374|b|   also identified in [93].
 375| |CoKu Tau/1 .    This star is 10 mm north, 12 mm east of CZ Tau on the chart for that star in [410].
 377|a|FQ Tau     .    The star is identified in [182]; it is also identifiable as the image 9 mm north, 9 mm west of
 377|b|   "WK X-ray 1" on the chart for that star (V819 Tau) in [410].
  32|a|BP Tau     .    [492] found a cyclic variation 12.07-12.27 (in V) with period 7.6 days.  High-resolution line profiles
  32|b|   are shown in [340,423], and lower resolution spectra in [93,212,303,458].
 378| |V819 Tau   .    According to [409], there is a cyclic variation with period 5.59 days.
  34|a|RY Tau     .    The historical light curve is in Kholopov, Perem. Zvzd. 13, 430, 1961, and in [534].  Additional UBV/RI
  34|b|   observations are in [220,225,227,229,266,281,284,410,492,511,528].  Observations of H@ are in [91,93,123,220,282,
  34|c|   423,531], of the spectrum in [123,220,281,294,303,340,423,458], and of the variable nebulosity in [206].  Velocity
  34|d|   variation was suspected in [212].  Extensive Lick observations gave inconsistent results: 1977-78, the velocity
  34|e|   scattered between +5 and +30 km/s (14 plates); 1978-79, constant at +20.0 % 1.0 km/s (12); 1979-80, constant at
  34|f|   +18.3 % 1.5 km/s (8).  The higher-accuracy observations of [189] gave an apparently constant value of +16.5 % 2.4
  34|g|   km/s in 1981-85.  The possibility that the star is an unresolved double was raised by [353].
 380| |HD 283572  .    The light varies sinusoidally in a period of 1.548 days [505].
 381|a|Haro 6-5B  .    Haro 6-5B is a very red, presumably stellar source (probably a T Tauri star: [99,347]), in the sw corner
 381|b|   of a triangular reflection nebulosity 15" west of 6-5A [158,345,347].  It is not clear if the infrared colors [490]
 381|c|   apply to 6-5B or include another source to the ne [158].
  35|a|T Tau      .    The most extensive published light curve is in Lozinsky, Perem.Zvzd. 7, 76, 1950.  Additional UBV/RI
  35|b|   observations are in [168,220,225,229,236,266,284,410].  Evidence for a photometric period of 2.80 days is in
  35|c|   [228].  Low-resolution spectroscopy is in [93,168,303,312], medium in [290,458], and high resolution profiles in
  35|d|   [187,337,340,423].  Values of W(H@) ranging from 38 to 80 A have been reported [91,93,236]; the Table value is a
  35|e|   compromise.  Optical observations of the companions are in [121,352,424], radio structure and coordinates in [424,
  35|f|   425], and optical astrometry in [180].  The history of the nebulae associated with T Tauri is given in [59] and
  35|g|   references therein.
 386|a|FV Tau     .    An occultation observation by M. Simon (unpublished) shows the star to be double, with separation
 386|b|   0".56 projected upon p.a. 55#; the K magnitudes are 8.05 (eastern) and 8.50 (western component).
 387| |FV Tau B   .    The quoted coordinates correspond to a separation from FV of 12" in 105#.
  36|a|DF Tau     .     The profile of H@ is shown in [123,187,423].  The spectrum is reproduced or described in [93,
  36|b|   123,187,303,413,423,458,500].  An occultation observation shows the star to be double, with separation
  36|c|   0".011 projected upon p.a. 103#; the K magnitudes are 7.22 (eastern) and 7.73 (western component): M. Simon,
  36|d|   unpublished.
  37|a|DG Tau     .    The emission spectrum is very rich.  In the red, "a few vague minima are probably the absorption lines
  37|b|   of a late-type star" [212].  Near 8700 A, "broadened absorption features consistent with an early M type" are
  37|c|   present [451].  The spectrum is shown or described in [303,312,337,340,458,500].  There is a knot having an HH-
  37|d|   like emission spectrum about 8" in 228# from DG [341].  About 55" south-west of DG is a series of emission knots,
  37|e|   named "DG Tau B" by [341].  Infrared photometry is in [490], the spectrum described by Jones and Cohen, Ap.J. Lett.
  37|f|   311, L23, 1986, long-slit spectroscopy in [347], CCD direct images in [341,347,451].  There is also reflection
  37|g|   nebulosity to the north of DG [206].
 389|a|GV Tau     .    A later-type star is imbedded in a very small, HH-like envelope.  The object is variable at 2.2 microns,
 389|b|   and emission H@ may also vary [160].  Direct images are shown in [128,451].
  39|a|DI Tau     .    DI Tau is about 16" from DH in p.a. 125# .  It is surprising that the H@ was detectable by [257]
  39|b|   if W(H@) is as low as reported in [93].
 390|a|Lick 6     .    Detected by [28] as variable, compact radio sources, the coordinates are from the VLA observations.
 390|b|   The spectral types and W(H@) values were estimated from the published scans.
  41| |IQ Tau     .    There is another star of about m(pg) = 17 at 10" in 301#.
  40|a|LkH@ 101   .    The optical coordinates from [8] and [57] are essentially the same; the coordinates of the radio
  40|b|   continuum source are in [57,96].  The spectral type of the star, either as observed directly (Allen, M.N.R.A.S.
  40|c|   161, 1P, 1972) as F8: II or as scattered off the nebulosity [200] as F, is in conflict with the Lyman continuum
  40|d|   type of early B, probably above the main sequence [57].  The near infrared is dominated by emission lines;
  40|e|   infrared observations are in [209,326,434,436,472].  A polarization map of the nebulosity is in [379].
 391| |Lick 3     .    (See the remark for Lick 6, NGC 1579.)
  42| |UX Tau B   .    The coordinates given for HBC 42 on p. 16 are of the A component.
  43| |UX Tau A   .    [189] note that the velocity may be variable.  In 1975, at the 120-inch coude, a close, faint companion
  43|b|   to A was detected with an image intensifier; it was estimated to be at about 2" in 180# : [250], note to
  43|c|   Table II.  This star (C) was much redder than A.  However, speckle observations have not confirmed its
  43|d|   existence [22].
  45| |DK Tau     .    The star is extremely variable in UBV.  [93] gives W(H@) = 19 A, while [91] find a range of 37 to 150 A.
  46|a|ZZ Tau     .    This is the variable discovered by Reinmuth; the confusion in HRC is explained in [250], note to
  46|b|   Table II.  Two Lick spectrograms show narrow H@ and weak He I emission.  The star has a very large infrared
  46|c|   excess: Rucinski, Astr.J.90, 2321, 1985.
 393|a|L1551/IRS 5.    There is an extensive literature on this object, the associated jet, and the more distant nebulosity
 393|b|   (Sh 239 = HH 102).  Most of the references other than those cited here are in [451].  CCD images of the region are
 393|c|   in [341,350,441].
  49|a|HL Tau     .    This nebulous, non-stellar object (note in HRC; [453] Fig.6; Grasdalen et al. Ap.J. Lett. 283, L57,
  49|b|   1984) has been classified as cont.(K7?) by [93], and as about M2 by [404], but the absorption spectrum apparently
  49|c|   cannot always be seen [101].  Infrared observations and photometry are in [88,100,328,410], and references therein.
  49|d|   Scans of the optical spectrum are in [93,101,123,312] and in Cohen and Schmidt, Astr.J. 86, 1228, 1981.  Long-
  49|e|   slit spectra and CCD direct images are in [341,347,416].
 395|a|V710 Tau B .    The separation is about 3".5 in 180#.  The coordinates are of the photocenter.  The photometry listed
 395|b|   for the northern component is of the combined light; [93] give V = 14.5: for the northern star alone.
  51| |V710 Tau A .    (See remark for V710 Tau B.)
 397|a|L1551-51   .    According to [506], the scatter in the individual velocity observations suggests that the star is a
 397|b|   spectroscopic binary.
 399| |V827 Tau   .    [408] find a cyclic variation 12.06-12.28 (in V) with a period of 3.63 days.
 400|a|V826 Tau   .    According to [408], there is a cyclic variation 12.07-12.14 (in V) with period 4.05 days.  The star is
 400|b|   also a double-line spectroscopic binary [344] with a period of 3.9063 days; the systemic velocity is given in the
 400|c|   Table.
 402| |FZ Tau     .    This star is erroneously called "FY Tau" in [250], Table II.
  54| |GG Tau     .    According to [93], there is a star about 4 mag. fainter, at about 12" in 205#, which has H@ in emission.
  52|a|UZ Tau e   .    UZ Tau is double: in 1944, 3".68 in 271#.5 [258].  The coordinates are of the photocenter; almost all
  52|b|   the photometric data refer to combined light.  The descriptions of the Mt. Wilson observations [256] leave no
  52|c|   doubt but that the eastern star in the active component; it was the same star that was responsible for the very
  52|d|   bright maximum in 1921 [213]. The eastern component was classified as M1,3 V(Li) in [212] and M1.5 by [93].
  52|e|   The two spectra are shown or discussed in [93,101,123,256,303,337,458].  The radial velocity of the eastern
  52|f|   component appears to be variable [123].
  53|a|UZ Tau w   .    (See the Note for UZ Tau e).  The western star has been classified as: dM3e [258], M4 V(Li) [212],
  53|b|   M0.5 [93].  The type given in the Table is a compromise.
 405| |V830 Tau   .    There is a cyclic variation in light with period 2.76 days [409].
  56| |GI Tau     .    There is evidence for a cyclic variation in light with period 7.2 days [492].
  59|a|IS Tau     .    There is a mixup in the literature because the coordinates of Haro 6-23 (=IS Tau) and 6-26 (=IT Tau)
  59|b|   tabulated in [182] are reversed with respect to the stars marked on the identification charts in [182].  Following
  59|c|   GCVS3 and 4 and [250], we follow the table rather than the chart, and so take the southwestern star as 6-23 = IS Tau,
  59|d|   and the northeastern as 6-26 = IT Tau.  Unfortunately this convention was not observed in HRC, which took the north-
  59|e|   eastern star as HRC 59 = Haro 6-23 = IS Tau, and as a consequence the identification chart in [410] reflects this
  59|f|   error.  Another consequence is that HRC 59 is not the same star as HBC 59.
  57|a|GK Tau     .    During the interval monitored in [492], the light curve showed a series of sharp, unevenly-spaced
  57|b|   minima.  The maxima between suggested a period of 4.6 days.
 406| |HN Tau/c   .    The companion is at 3".3 in 205# [93].  The coordinates are those of the primary.
 408|a|Wa Tau/1   .    There is weak emission at H@ and emission cores in H,K, but Li I 6707 is not detected, so this may not
 408|b|   be a pre-main sequence star.
  64| |HO Tau     .    There is a mag. 16 star at 8" in 110#.
 409|a|FF Tau     .    The star was found to be double in an occultation observation [435].  The separation was 0".037
 409|b|   projected upon about p.a. 257#.  The K magnitudes are 10.06 (eastern component) and 9.06 (western).
  65|a|DN Tau     .    Extensive photometric observations by [45] suggested rotational modulation with period 6 days; [492]
  65|b|   found P = 6.6 days, and a V range 12.29-12.42.
 410| |L1642-2    .    Nebulous; there is a red companion (1.1 mag. fainter in R) at 2".7 in about 13#.
 413|a|L1642-1    .    A nebulous double star; the very red secondary (1.9 mag. fainter in R) is at 5".8 in about 140# [416].
 413|b|  The star is marked on a photograph in Sandell et al., Astr.Ap. 97, 317, 1981.  It was observed (as an IRAS
 413|c|  galaxy) by [357]; that scan shows strong Balmer emission lines on an M-type background (D.E. Osterbrock,
 413|d|   private comm.).
 414| |CoKu HP Tau/G3.  According to [101], the scans of HP Tau/G2 and /G3 in [93] are interchanged.
 415|a|CoKu HP Tau/G2.  (See the note to HP Tau/G3).  Lick coude spectrograms of /G2 show H@ absorption with a weak, sharp
 415|b|   emission fringe to shortward, and an even weaker to longward.  The absorption lines are very wide; Li I 6707 is
 415|c|   moderately strong.  The spectral type quoted is from those plates.
 418|a|HV Tau     .    The star has been variously referred to as "companion of DO Tau", "red nebulous star 2' east of DO Tau",
 418|b|   or "DO Tau/east".  It is 4 mm east of DO Tau on the chart for that star in [410].  It was classified M2 in [93].
  68|a|VY Tau     .    The light curve is discussed in [213, 327].  The colors and type in the Table refer to minimum light.
  68|b|   Near maximum, the spectrum is completely different, being dominated by low-excitation emission lines of
  68|c|   neutral metals.  A brief H@ flare was observed [236] at minimum light in 1985.
 424| |Haro 6-37/c.    [93] gives the separation as 3".5 in 40#.  The coordinates are those of the primary.
  73| |Haro 6-37  .    (See remark for Haro 6-37/c.)
  74|a|DR Tau     .    The star was faint, near B = 14, prior to about 1961.  In 1946, it had been classified dK5e, "spectrum
  74|b|   veiled by continuous emission" [257].  It brightened 2-3 mag. in B between 1961 and 1980, with major fluctuations
  74|c|  [69,165].  The spectrum is now a hot continuum with strong emission lines of H, He I, Fe II [1,14,33,123,212,220,
  74|d|   297,303,337,481].  The dK absorption spectrum is no longer detectable (at least in the red), but a spectrum
  74|e|   rather like that of an F star can be seen in the IUE ultraviolet [220].
  75|a|DS Tau     .    The dF0 companion, m(pg) = 13.7, is roughly 8" from DS (not 4" as in [257]); it was excluded from the
  75|b|   UBV observations of [25].  The mean velocity velocity of DS, +16.3 % 2.3 km/s from 3 observations [189], is
  75|c|   to be preferred to the value of 0 % 2 km/s of [219] from 6 spectrograms, but the discrepancy is puzzling.  The
  75|d|   type in the Table (K5 V) is a reclassification from Lick coude material; [93] gave K3 and [257] dK4.
  76|a|UY Aur     .    The star is a close double; [258] give 0".82 in 212# in 1944; the companion was about 0.5 mag. the
  76|b|   fainter at that time.
  77|a|GM Aur     .    Repeated velocity observations by [189] give a constant value of +15.0 % 1.3 km/s, which is quite diff-
  77|b|   erent from the mean of -3 % 4 km/s, from 6 plates, of [219].  The discrepancy is unexplained.  [257] gave +24 km/s,
  77|c|   but from 2 low-dispersion plates.  The type of K3 V of [212] is confirmed on reexamination; [93] gave K7,M0.
 426| |LkCa 19    .    The type is K5 (Li) according to [506].  The W(H@) is a compromise of values from [189,219,506].
  78|a|AB Aur     .    Since HRC, the star has been studied in detail by Catala, Praderie and co-workers.  References to their
  78|b|   earlier work are in [68]; their IUE spectroscopy is in Ap.J. 254, 658, 1982 and 303, 311, 1986; Astr.Ap. 140,
  78|c|   421,1984 and 182, 115, 1987.  Further UBV/RI observations are in [31,50,225,229,430], and infrared in [3,31,32,
  78|d|   55,81,87,91,155,316,372,452].  There is evidence for rotational modulation in the line profiles with a period
  78|e|   of 40-50 hours; see also [137].
  79|a|SU Aur     .    Additional UBV data are in [50,167,225,229,236,375,410].  The W(H@) is usually 2-6 A but on one occasion
  79|b|   was found to be 14 A.  There is suspicion of a rotational modulation in light with a period of either 2.73 or
  79|c|   1.55 days [229].
 427| |NTTS 045251.    According to [506], this is a single-line spectroscopic binary.
 428|a|V347 Aur   .    The star illuminates a variable nebula.  The light curve resembles that of a long period variable.  A
 428|b|   1978 Lick coude spectrogram shows strong, rather narrow H@, fairly strong [O I] anf Fe II, and probably He I
 428|c|   emission.
 429|a|V836 Tau   .    The cyclic variation found by [409] has a period of 6.99 days.  The star was identified incorrectly on
 429|b|   the original chart [132].
 430|a|UX Ori     .    The star is not convincingly associated with nebulosity, so it may not belong to the Ae/Be class.  There
 430|b|   have been extensive UBV observations: [226,229,273,276,478,527,530].
  81|a|RW Aur B   .    The coordinates are based on the offset from A; the only actual double star measurement is that of
  81|b|   [258]: 1".22 in 254#.3, made in 1944.  When A is near minimum light, the companion contributes significantly to the
  81|c|   light and spectrum.
  80|a|RW Aur A   .    Since the work referenced in HRC, UBV/RI data have been published in [1,60,91,226,328,377]; much of the
  80|b|   photometric observations are collected in [410].  The optical spectrum has been reproduced or discussed in [1,16,
  80|c|   60,93,174,187,303,340,413,423,458].  IUE observations are in [15,65,239,240,241].  There is evidence for a 5-day
  80|d|   cycle in both the light (Herbig 1962) and in the line structure [174].  Repeated radial velocity observations
  80|e|   by [189] suggest that the velocity may be variable, with a range of about 10 km/s.
 431|a|V1012 Ori  .    This object was observed as an IRAS galaxy by [357], but found to be a Be star.  The variability was
 431|b|   discovered by Morgenroth (Astr.Nach.253, 441, 1934 [with chart]; 254, 366, 1935).  The scan of the red region by
 431|c|   [357] shows H@ emission central on broad absorption wings, and strong Na I D lines.
  83|a|V534 Ori   .    The coordinates are for St 37, identified with V534 Ori by [444], but [118a] identify the variable
  83|b|   with St 38.
  84|a|CO Ori     .    Elvey and Babcock (Ap.J. 97, 412, 1943) classified the spectrum as early F, with peculiarities; it has
  84|b|   since been typed gF3 (Joy and Wilson, Ap.J. 109, 231, 1949), F8:n [212] and G5 [93].  When the star was near
  84|c|   minimum light about 1950, Herbig saw it as double (about 1" in 280#), but [22] could detect no such companion
  84|d|   in 1980, with CO near maximum.   Additional UBVRI observations are in [91,225,229,236,328].
  85|a|GW Ori     .    The spectrum has been classified as G5 (Zappala, Ap.J.172, 57, 1972); G5: [93]; G5,8 V [212]; and dK3
  85|b|   [257].  Additional RI observations are in [236,328].
  86|a|V649 Ori   .    There is a faint companion at 1".41 in 350#; $m is about 2 mag.  The UBV photometry of [338]
  86|b|   includes both stars.  There was marginal evidence [22] for another star at 0".47, p.a. 36# or 216#.  Other
  86|c|   spectral classifications have been dK3 [257] and K4 [93].
 432| |P102       .    The H@ emission was first noted by MacConnell, Astr.Ap.Suppl. 48, 355, 1982.
  88|a|V370 Ori   .    The strength of H@ emission must be variable, because the W(H@) reported by [93] would not have been
  88|b|   detectable on objective prism plates.  See the note in HRC regarding the clustering of emission-line stars around
  88|c|   GX Ori.
 433| |V447 Ori/c .    This star is about 5" in 30# from V447 Ori [119].  The coordinates are those of the primary.
 434| |Rst 137B   .    This star is at 9".3 in about 344# from A [487].  The coordinates are those of the primary.
 435|a|AB Dor     .    Additional UBVRI observations are by Lloyd Evans, Circ.So.African Astr.Obs. no. 11, 73, 1987, and by
 435|b|   Collier Cameron, ibid. p. 57.  The reasons for suspecting that this may be a pre-main sequence star are in [486].
 435|c|   The mean radial velocity in the Table is that of [103]; the velocity may be variable with a range of about 22
 435|d|   km/sec: [244].
  94|a|HK Ori     .    This star is at the apex of the reflection nebula PP 29.  There have been numerous infrared observations:
  94|b|   [3,32,81,91,100,157,273,316,452].
  96| |V453 Ori   .    The star is double: 3" in 190#, the companion being about 2 mag. the fainter [119].
 436|a|RY Ori     .    The spectrum may be composite: He I 5875 suggest a B star, yet the remainder of the spectrum in the red
 436|b|   is about F8.  H@ is a strong double emission line, and Li I 6707 is present in moderate strength.  The star can
 436|c|   be identified from the chart by Wolf, Astr.Nach.171, 77, 1906, where it is 117.1904.
 437|a|P1207/c    .    The companion is at 25" in 75# from A [93]; it has weak H@ emission. [93] found no H@ emission, despite
 437|b|   the objective-prism detection.  The UBV colors in [11] must be in error.  The coordinates are those of the primary.
 104|a|VY Ori     .    There is a fainter star about 15" from VY in p.a. 135# .  According to [497], its colors are: V=16.35,
 104|b|   B-V=+1.39, U-B=+0.71.
 441| |WX Ori/c   .    The companion is at 11" in 10# from WX [93].  The coordinates are those of the primary.
 447|a|P1540      .    According to [324], the star is a double-line binary with P = 33 days; both stars show strong Li I 6707
 447|b|   and intense Ca II H,K emission.  The integrated type has been given as K1 IV-V [364] and K4 V [483]; the K3 III:  in
 447|c|   the Table is from a Lick coude plate.  According to [483], the star is not a member of the Orion cluster.
 452|a|P1724      .    A non-member of the Orion cluster according to [483], although the spectroscopic criteria indicate that
 452|b|   it is a pre-main sequence star.
 456|a|MR Ori     .    The star is projected upon very bright nebulosity, so it is has not been possible to determine whether
 456|b|   there is emission in the core of H@ or not; certainly no stellar emission lines are present elsewhere in the
 456|c|   spectrum.  The star is included in this Catalog solely on the basis of its (alleged) variability and location in
 456|d|   the Orion Trapezium cluster.
 457|a|AE Ori     .    The nebulosity is very bright, and from the single Lick spectrogram it was impossible to determine
 457|b|   whether stellar H@ emission is present or not.
 459|a|P1925      .    A Lick CCD spectrogram shows a fairly strong Li I 6707 line, but there is no evidence for emission at
 459|b|   H@, although the background nebulosity is so bright that a weak stellar emission core could have been concealed.
 461| |TU Ori     .    There is a large dispersion in the assigned spectral types: see [221].
 464|a|CQ Tau     .    The UBV data are for maximum light [166].  The H@ region was described by Bonsack and Greenstein (Ap.J.
 464|b|   131, 93, 1960).  A Lick coude plate of 1973 showed double H@ emission upon broad absorption wings.  The absorption
 464|c|   spectrum otherwise is like an early F star.
 466|a|AH Ori     .    The spectrum was classified K0 IV,V by [248].  A Lick coude plate shows H@ in absorption, with no certain
 466|b|   emission component; this appears to be a genuine example of a pre-main sequence star without obvious line emission,
 466|c|   at least in the red.
 471|a|NV Ori     .    [270] regard this star as constant, but [227] report a V range of 0.6 mag.  there is complex emission in
 471|b|   H@, supertimposed upon absorption wings.  Li I 6707 is present but not unusually strong.
 148|a|NY Ori     .    The star is normally faint, but when near maximum has the emission spectrum described in [197].  It is
 148|b|   about 5" se of P2118.
 147| |TV Ori     .    The photometry of [338] and of [497] are not in good agreement.
 150| |AN Ori     .    A Lick CCD scan shows H@ filled in to the level of the continuum.
 477| |V1018 Ori  .    The companion is at 22" in 127# from CE Ori [93].
 154|a|T Ori      .    According to Shevchenko (Flare Stars and Related Objects [ed. L. Mirzoyan], p. 230, 1986), T Ori is a
 154|b|   single-line spectroscopic binary with P = 14.268 days.  A cyclic light variation having the same period is present.
 155| |AR Ori     .    There is a companion about 2" distant.
 480| |P2292      .    According to [483], the star is not a member of the Orion cluster.  [499] finds variable radial velocity.
 481| |AV Ori/c   .    The separation is 6" in 305# [93].  The coordinates are those of the primary.
 164|a|V380 Ori   .    This is nearly unique among the T Tauri stars in having an A-type spectrum.  It is ADS 4209, but that
 164|b|   companion (mag. 13.0, about 3" in 220#) and another suspected by Jonckheere (Mem.R.A.S. 61, 57, 1917) were
 164|c|   probably only structure in the nebula NGC 1999.  No such stars are detectable on modern photographs, nor can
 164|d|    any be seen visually at the 120-inch telescope.  Additional UBVRI observations are in [116,229,328,378], and
 164|e|   additional spectroscopy in [413].  A polarization map of the nebulsoity by Warren-Smith et al. is in M.N.R.A.S.
 164|f|   192, 339, 1980.
 484| |P2441/c    .    The separation is 4".5 in 145# [93].  The coordinates are those of the primary.
 167|a|P2441      .    Spectral types assigned have been: G1 IV [411], G3 [329], G5 [93], and "about G8n" from Lick spectrograms
 167|b|   in the red.  All conflict with the blue-region type of F5: in HRC.  There is very strong, slightly asymmetric
 167|c|   emission in H@.  There is a nebulous patch (HH 63) about 30" southwest (Reipurth and Graham, priv. comm.).
 485|a|V586 Ori   .    Lick spectrograms showed strong complex emission, variable with time, in H@.  It is superposed upon the
 485|b|   absorption wings of an early-type star.  A few He I and Fe II lines suggest a type of late B or early A.
 169| |BF Ori     .    Additional UBVRI observations are in [229,273,391,430].
 489|a|V883 Ori   .    This is the faint red variable slightly west of the apex of the reflection nebula IC 430 = Haro 13a
 489|b|   (see [453], Fig. 5).  The entry is retained although there is no evidence that the star has ever exhibited H@
 489|c|   emission: [7,181,312,363].
 490|a|Haro 2-249/c.   The coordinates are approximate.  These two stars and the ring-shaped nebula associated with the primary
 490|b|   are shown on a CCD image in [161] and on [453] Fig. 5.
 492|a|+26# 887   .    This is the "nebulous star 3' from RR Tau" in [203].  No emission was present in the photographic region
 492|b|   on early Lick spectrograms, but P Cyg structure is present at H@ on a 1982 coude plate.
 493|a|V350 Ori   .    A 1973 Lick spectrogram showed complex H@ emission, with narrow central reversal, superposed upon the
 493|b|   absorption wings of an early-type star.  He I 5875 is rather strong, so a B type is indicated.
 494|a|Reipurth 50.    The coordinates are of the approximate center of a nebulosity that is believed [386] to be illuminated
 494|b|   by a heavily obscured star about 1'.5 north.  The nebula is variable in brightness.
 182|a|San 6      .    A 1978 Lick coude spectrogram showed a strong, symmetric H@ emission line and a well-defined K-type
 182|b|   absorption spectrum.  The observation of San 6 in [93] must refer to another star.
 185|a|V631 Ori   .    [93] found no H@ emission in 1976, yet rather strong emission in the photographic region was observed at
 185|b|   Lick in 1960, and the star was originally detected on the basis of a bright H@ line [322].
 186|a|FU Ori     .    The coordinates are from Duerbeck, Sp.Sci.Rev. 45, 1, 1987.  The earlier history of FU Ori is summarized
 186|b|   in [207,213].  It remains not far below maximum light.  The UBVRI data in the Table are rough means from extensive
 186|c|   observations in 1984-85, during which time a cyclic variation of length 9 or 18 days was present [286].  The
 186|d|   spectrum is very complex, and the type assigned appears to depend on wavelength; the value in the Table is for
 186|e|   the red region.  References to infrared and recent high-resolution spectroscopy, and other properties of the
 186|f|   spectrum, are [188,190,191].  Although not expressed in terms of v sin i, [190] gives line widths measured in
 186|g|   a variety of spectral regions.
 502|a|SSV 61     .    This star, in a complex reflection nebulosity, is object 140 in [448], Fig. 1a; it is also in [211],
 502|b|   Fig. 8.  It was classified as an M2,4 giant by [448]; a Lick CCD spectrum indicates a slightly earlier type.
 515|a|+1# 1156   .    This peculiar star illuminates the nebulosity Par 3 = PP 46.  The presence of Li I 6707 is confirmed on
 515|b|   a Lick CCD spectrum, on which H@ is filled to continuum level with emission.
 190| |LkH@ 336   .    (See the following remark for LkH@ 336/c.)
 516|a|LkH@ 336/c .    This, the brighter companion of LkH@ 336, is at 15" in 90#; it is 2 mag. fainter than A [93].  It is
 516|b|   apparent on the identification chart in HRC.  According to [93], there is another star at 6" in 140#, 5 mag.
 516|c|   fainter than A.
 193| |LkH@ 208   .    An optical polarization map of the nebulosity is in Shirt et al., M.N.R.A.S.204, 1257, 1983.
 199|a|MWC 137    .    As noted in HRC, this is a high-luminosity object that may not be pre-main sequence.  The star is sur-
 199|b|   rounded by a 56" x 80" ring of nebulosity; it is 195 -0# 1 = Sh 2-266 in Perek and Kohoutek "Catalogue of
 199|c|   Galactic Planetary nebulae", which gives an identification chart.
 200|a|LkH@ 340   .    The labels on the charts for LkH@ 340 and 341 in Figs. 4 and 5 of HRC were interchanged. Drs. U.
 200|b|   Bastian and M. Cohen have confirmed that their respective observations [25,93] were of the stars at the coordinates
 200|c|   given in HRC, not of the stars on the incorrectly labelled charts.
 201| |LkH@ 341   .    (See the preceding remark for LkH@ 340.)
 525| |V486 Mon   .    There is a faint companion at about 6" in 73#.
 528| |LkH@ 215   .    The coordinates are only approximate on account of interference by the bright nebulosity.
 529|a|HD 259431  .    Although this star is often considered a member of the Ae/Be class [203], the possibility still exists
 529|b|   that it is a conventional Be star.  The modern spectral classifications range from B2e [138] to B5 [452] and
 529|c|   B6pe [224].
 207|a|R Mon      .    The coordinates are those of feature "a" at the apex of the small (about 3") triangular nebulosity
 207|b|   known as "R Mon" [251].  Its brightness dpends heavily upon aperture size and angular resolution.  The spectrum
 207|c|   is peculiar and variable: see [208,251] and references therein.  Infrared speckle observations are in [29], and
 207|d|   infrared spectrophotometry in [87].  The structure of the nebulosity in [S II] is described by Brugel et al.
 207|e|   (Ap.J. Lett. 287, L73, 1984), and photometry and polarimetry of NGC 2261 are in [21] and in Warren-Smith et al.
 207|f|   Ap.J. 315, 500, 1987.  The HH Object HH 39 lies on the axis of NGC 2261 about 7' north of R Mon: see [251]
 207|g|   and Walsh and Malin, M.N.R.A.S. 217, 31, 1985.
 209| |G-G 405    .    There is a faint companion at about 4" in 150#.
 531| |VSB 2      .    The type F7 V [526] in the Table is in conflict with the K0 of [488].
 534|a|W68        .    The various spectral classifications are not in good agreement, probably because of the very broad lines:
 534|b|   F2 [488], F4 V [526], G0 IV,V [494].
 219|a|V590 Mon   .    The spectrum is peculiar, and at low resolution there has been considerable disagreement in the classi-
 219|b|   fication: B4 V [526], B9-A0 [93], B8 + shell [203], A2-3 [199].
 222| |W108       .    Spectral classifications range from F7 V [526], F8 [458] to F9 [93] and G0 [488,494].
 535|a|W121       .   The star is located very near S Mon, which may account for the large discrepancies is the published UBV
 535|b|   photometry, amounting to 2 mag. in V: [414,433,494].  A Lick CCD spectrogram showed moderately strong H@ emission
 535|c|   with central reversal, and strong Li I 6707 absorption.
 227|a|IP Mon     .    The star is very closely nebulous.  The type K3 was assigned by [93,401], while [488] give K2 and [526]
 227|b|   gives G8 V:.  The H@ emission is rapidly variable: Marcy, Astr.J.85, 230, 1980.
 538| |W154       .    The type G2 III,IVp is from [494], while [526] gives G2 V and [488] G7.
 231| |V360 Mon   .    The type F8 is from [93], but [401] gives K2 or earlier, and [526] G8 V.
 236| |V365 Mon   .    This star is 7" from V591 Mon.
 543|a|OX Mon     .    The emission originates in the northeast component of a close pair (7" in 35# : [93]).  The photometry
 543|b|   refers to the combined light.  No emission is seen in the other component [93].
 546|a|NGC 2313   .    The involved star has a complex emission structure at H@, and in the red an absorption spectrum perhaps
 546|b|   of type G with very strong Ba II lines.
 548| |LkH@ 218   .    This may be an ordinary Be star.
 243|a|Z CMa      .    The spectrum is very complex and possibly composite.  References to earlier spectroscopic work are in
 243|b|   HRC; more recent papers: [104,123,452].  The optical and VLA coordinates are not in close agreement [96].  An
 243|c|   optical companion was reported in [139] but has not been confirmed.  Infrared speckle observations show the star
 243|d|   to be slightly extended in the east-west direction [311].  UBV/RI photometry is in [50,91,225,229,275].  Many
 243|e|   infrared observations have been reported: [3,31,32,81,87,155,224,273,316,372,452].  The VLA observations are
 243|f|   in [34,96,101].
 551| |LkH@ 220   .    This may be an ordinary Be star.
 552|a|NX Pup     .    The spectral type in the Table is a compromise: the star has variously been classified as A0-1 III
 552|b|   [478], A1 [138], F0 Ipe [245], F1-2 [381], and F2 III [49].  H@ is in emission but the decrement is very steep.
 563|a|ESO313-N*10.    At least 9 condensations, most of them red with H@ in emission, are imbedded in a bluish nebulosity about
 563|b|   35" in diameter having an early-type absorption spectrum.
 565|a|SY Cha     .    The type M0: is from [17]; an earlier classification was K2 V [12].  The star has shown a cyclic
 565|b|   variation in brightness with range 1.6 mag. in B and a period of 6.129 days [259,325,422].
 567|a|TW Cha     .    A cyclic variation is present with a period of 8.6 days and a range of about 1.0 mag. in V.  There are
 567|b|   also concurrent changes in the emission spectrum [259].
 568|a|TW Hya     .    The spectrum is in all respects like that of a T Tau star, but there is no nearby cloud.  Three Lick
 568|b|   spectrograms gave velocities of -9, +12 and +9 km/s, a range large enough to raise the suspicion that the star may
 568|c|   be a binary.
 569|a|CS Cha     .    The spectral type in the Table is a compromise of K2 [196], K5 [403] and M0 [17].  The value W(H@) = 13 A
 569|b|   from [17] differs from the 59 A in [403].
 570| |CT Cha     .    The type K7: is from [17]; [196] give G8:.
 575|a|VW Cha     .    Variability of H@ was suspected from the first observations [196], and confirmed by later results [17,
 575|b|   403].  A mean value is given in the Table.  The K2 type is from [17], but the star was classified earlier as
 575|c|   G1 V: [12].
 246| |CU Cha     .    The spectral type is from the Michigan Spectral Catalogue 1, 1975; it was given as B9.5e V in [196,403].
 578| |VZ Cha     .    A cyclic variation with a V range of about 0.7 mag. and period 7.2 days has been observed [259].
 583| |WY Cha     .    The star was classified K0: (Li) by [196].
 585| |WZ Cha     .    [196] give the type as G:.
 588|a|Sz 41      .    The coordinates and photometric data are for Sz 41, while the infrared references and spectral type
 588|b|   refer to HJM E1-9a.  The coordinates of the two objects agree within about 10", and it is assumed that they are
 588|c|   the same.  [238] state only that line emission is present, giving no details
 591|a|T Cha      .    T Cha has sometimes been regarded as a pre-main sequence star on the grounds of its rapid, irregular
 591|b|   variability and location on the edge of a small dark cloud [232,233], but spectroscopic proof is lacking. There
 591|c|   is no obvious emission at H@ or elsewhere; unfortunately the Li I 6707 region has not been observed adequately.
 591|d|   A cyclic variation with a period of 3.2 days has been suggested [325].
 592|a|Bipolar nebula. The spectral type refers to the northern lobe [351].  The southern extension has an HH-like spectrum;
 592|b|   there is probably an A0 star involved.  Polarimetry of the nebulosity is in [461].  The UBV data were taken through
 592|c|   a 23" aperture [508].  It is uncertain whether this is a pre-main sequence object.
 595|a|S2         .    S2 is considered [421] to be the central object of a nebulous cluster, but earlier [58] was regarded as
 595|b|   the central star of a bipolar nebula.  The coordinates are approximate.
 251| |RU Lup     .    Additional UBV/RI observations are in [25,145,266,427].
 252|a|RY Lup     .    A quasiperiodic variation of length 3.76 to 4 days was discovered by Hoffmeister [232], and confirmed by
 252|b|   more recent work [46,129,314].  W(H@) ranges from invisibility [17] to about 25 A [314], apparently in
 252|c|   antiphase with the light cycle.
 253|a|EX Lup     .    The photometry refers to minimum light, but the values in the Table are the brightest of 7 observations
 253|b|   [25].  References to earlier work on the star, especially near maximum, are in HRC and [213].
 617|a|Sz 102     .    The spectrum contains strong emission lines of [O I], [N II], [S II],..., characteristic of HH Objects,
 617|b|   superposed upon a late-type continuum and stellar absorption spectrum [17,295,299,426].  Two isolated patches of
 617|c|   emission nebulosity lie about 13" e and w of the star [295].
 619|a|V856 Sco   .    Observations in the Stromgren and Walraven photmetries are in [467,468,469].  The star is reputed to have
 619|b|   a close companion (Rst 3930B, at 1".3, mag. 12), but it was not detected in speckle observations [22].
 631|a|Sz 124     .    The fact that the star was detected by objective prism observers [426,463] seems incompatible with the
 631|b|   low value of W(H@) = 1.6 A in [17].
 632|a|V866 Sco B .    The companion is about 1".4 in 20# from the (slightly) brighter primary.  Both stars have the infrared
 632|b|   Ca II lines strongly in emission.  The coordinates and photometry refer to the combined light.
 254|a|V866 Sco A .    The type K0 assigned in [93] was not in acceptable agreement with the M0: of [212].  Reexamination of the
 254|b|   Lick material shows that it clearly lies betwee K3 V and M0 V, hence the K5 V in the Table.  Narrow He I emission
 254|c|   lines are present.  The coordinates and photometry refer to the combined light.
 634|a|Wa Oph/3   .    H@ emission was discovered by The [465], which is surprising considering the low value of W(H@) = 0.3 A
 634|b|   in [502].
 637|a|DoAr 21    .    H@ emission was reported by objective-prism observers between 1949 and 1960, but has not been seen on
 637|b|   slit spectrograms since 1973.  The object at that position is very variable as observed with the VLA, and moderately
 637|c|   so in X-rays [133].  No optical variability was detected on Lick Astrograph plates [369].
 638| |DoAr 24    .    The X-ray coordinates [332] are in better agreement with DoAr 24 than with DoAr 24E.
 260|a|DoAr 22    .    The coordinates are those of the m(pg)=13.0 star, type F5:e, listed in HRC.  The emission-H@ object
 260|b|   33 identified in [524] as DoAr 22 is a much fainter star located 1 mm south, 3 mm east of DoAr 22 on [524] Fig. 1;
 260|c|   its spectrum has not been observed.
 639|a|DoAr 24E   .    According to [539], the star is double, separation 1".95 in p.a. 0# .  The only positive detection of H@
 639|b|   emission is by [524].  The X-ray emission probably originates in DoAr 24.
 262|a|SR 24 s    .    The coordinates are of the photocenter of the pair (6" in 60# ); individual positions are in [524].  The
 262|b|   ROX observation included both stars.  A variation 16.4-17.1 (pg) is observed in the combined light [369].  Attention
 262|c|   was called to the duplicity and the associated nebulosity by Haro and Chavira, Inf.Bull.Var.Sts. 926, 1974.
 262| |SR 24 n    .    (See remark for SR 24 s).
 640|a|ROX 20-1 nw.    The separation of the pair is about 13" in 302# .  X-ray flaring has been detected in the unresolved
 640|b|   image [332].  H@ emission in both stars was originally noted on a Lick slitless spectrogram.
 641| |ROX 20-2 se.    (See remark to ROX 20-1 nw).
 263|a|S-R 12     .    Speckle observations show the star to be a close double (0".30 in about 85#), with K magnitudes
 263|b|   9.34 (eastern) and 9.17 (western).  It was also resolved in an occultation observation [435].
 642|a|ROX 31     .    The coordinates are from a VLA observation.  The spectroscopic observation is by Bouvier and Appen-
 642|b|   zeller, quoted in [10].  The star was not detected in the H@ surveys of the region.  An occultation observation
 642|c|   [435] showed the star to be double with separation 0".13 projected upon p.a. 337#.  The K magnitudes are 8.72
 642|d|   (eastern) and 9.00 (western component).
 265|a|SR 10      .    There is a large difference between the W(H@) values of [17] and those of [93,402]; the mean of the
 265|b|   latter is given in the Table.
 644|a|Haro 1-14/c.    Haro 1-14 is actually the fainter, southeastern component of the pair of stars (separation about 10") at
 644|b|   this position.  The UBV photometry refers to the combined light.  The brighter star, here called Haro 1-14/c, has
 644|c|   emission cores in H,K [404].
 267| |Haro 1-14  .    (See remark for Haro 1-14/c).
 645|a|Reipurth 13.    This a a faint, extended nebulosity (6" x 8"), apparently scattering the light of an imbedded star
 645|b|   having H@ in emission [9].
 646|a|V346 Nor   .    This very red star is at the edge of HH 57 [426].  Originally discovered as an infrared source [384], it
 646|b|   became detectable in the visual region about 1983: [102,169,382] and references therein.
 271|a|AK Sco     .    The type is from the Michigan Spectral Catalogue and Lick coude material.  The spectrum in the red
 271|b|   appears composite.  Two Lick CCD scans show double lines with a splitting of about 200 km/s; at other times the
 271|c|   lines have been single.  Clearly, the star is a double-line binary.  Li I 6707 is strong in both components.
 655|a|V921 Sco   .    The emission spectrum of this nebulous star was noted independently by Vandervoort and The
 655|b|   (priv.comm.), by Henize (Astr.J. 67, 612, 1962), and by N. Irvine.
 656| |AS 216     .    There is a faint companion at about 5" in 200#, about 4 magnitude fainter than AS 216.
 272|a|IX Oph     .    Lick coude spectrograms show sharp H@ emission on a weak metallic-line spectrum; Li I 6707 is not
 272|b|   present.  The star's image is marked on Pl. I of [464], but no number was assigned.
 273|a|KK Oph     .    The star was noted as double at the 120-inch in 1987: the separation is 1-2" in p.a. about 240# , the
 273|b|   magnitude difference about 1 mag.  Narrow [N II] and [S II] lines are present in the brighter component; [Fe II]
 273|c|   emission has been reported in the blue [6].
 275|a|LkH@ 346 nw.    [93] give 6".5 in 130# as the position of the se component with respect to the nw.  The coordinates
 275|b|   are those of the photocenter.
 275| |LkH@ 346 se.    (See remark for LkH@ 346 nw).
 658| |RNO 92     .    The star is double: 4".4 in 65# ; direct images are shown in [388].
 280|a|SV Sgr     .    The star is superimposed on the very bright H II region NGC 6523.  Lick coude spectrograms show P Cyg
 280|b|   structure at H@ and very strong emission at the infrared Ca II triplet.
 281| |LkH@ 118   .    The classification as B5 Vp [139] conflicts with the description of the spectrum in [201].
 662|a|V4046 Sgr  .    [113] find the star to be a single-line binary with P = 2.43 days; [62] suspect double lines.  W(H@)
 662|b|   varies between 30 and 120 A.  Flaring was observed by [61].  The star can be identified from the HDE chart (Harv.
 662|c|   Ann. 112, 1949).
 663|a|-10# 4662 B.    The star is double (1".33 in 11#.5 in 1972: Walker, Pub.U.S.Nav.Obs.25, pt.2, 1985); the coordinates and
 663|b|   photometry refer to the combined image.  It is not known which component is the flaring variable.  According to
 663|c|   [77], there is also a sinusoidal variation with P = 5.20 days, amplitude 0.1 mag., in the integrated light.
 664| |-10# 4662 A.    (See remark to -10  4662 B).
 666| |CoKu Ser/G1/c. This companion is at 3".5 in 140# from G1; the coordinates are of the photocenter.
 667| |CoKu Ser/G1.    (See remark for CoKu Ser/G1/c).
 282| |VV Ser     .    The coordinates are from Reinmuth, Astr.Nach.225, 386, 1925.
 672|a|CoKu Ser/G7.    This is probably star 2 of [456], Table II.  Warren-Smith et al. (M.N.R.A.S.227, 449, 1987) present a
 672|b|   polarization map of the nebula (called the "Serpens object" in [453]).  Their Fig.1 identifies the infrared
 672|c|   sources in the area; their Pl. 1, and Fig. 7 of [453], are photographs of the region.
 284|a|AS 310     .    See the remarks in HRC.  The photometry contains the contribution of a faint companion at 3-4" [25,139].
 284|b|   A Lick coude spectrogram shows shallow absorption under the sharp central H@ emission, and narrow He I absorption
 284|c|   lines.  Strong interstellar features are present.  Clearly, this is a hot, high luminosity object.
 673| |Kn H@ 10   .    [323] find no line emission.  The spectral type is K, but it may be a giant.
 675| |Kn anon 2  .    A late-type absorption spectrum was found by [323], but no line emission.
 286|a|S CrA      .    The emission spectrum is very strong, and the underlying absorption spectrum can be seen only with
 286|b|   difficulty.  The star is a close double, usually not resolved photometrically or spectroscopically.  Discovered
 286|c|   by [258], it was remeasured by [22]: separation 1".37, p.a. 147#, $m about 1 mag. in 1981.  Additional UBV
 286|d|   photometry is in [25,263,266,323,336].  The spectrum is reproduced or discussed in [17,18,122,212,323,336,337,
 286|e|   400,401].
 287|a|TY CrA     .    See the remarks in HRC.  there may be a weak emission component in H@ [139].  According to [264], the
 287|b|   star is an eclipsing variable with P = 2.888797 days.  The other bright star in NGC 6726/7, CoD-37# 13023, has a
 287|c|   close companion discovered by Hubble.  At the 120-inch coude, this star was estimated of mag. 13-14, at 3" in 160# .
 677| |MaRy/H@ 2  .    H@ emission was first noted by [274], and the star was marked but not numbered in their Fig. 1.
 288|a|R CrA      .    Published V's show large scatter, due either to real variability or the effect of the nebular background.
 288|b|   Rapid changes in the nebula and in the H@ profiles in nebula and star have been described by Graham and Phillips
 288|c|   (Pub.A.S.P.99, 91, 1987).
 289|a|DG CrA     .    See the remark in HRC.  Since that time, H@ emission has apparently been detected by [274] and [323].
 289|b|   The coordinates are approximate, from Van Gent (B.A.N.7, 21, 1933).
 290|a|T CrA      .    There is a difference of about 2 mag. between the V's of [329] and those of [273] and [323], possibly due
 290|b|   to variability.
 681|a|FG Aql     .    The type in the Table (K2) is from [93], but a Lick coude spectrogram in 1977 was classified as K7,M0 V
 681|b|     with strong Li I 6707, and double H@ emission (R>V).
 684|a|WL 22      .    This object was found by Wooden and Lada (unpublished).  A 1981 Lick spectrogram showed narrow H@
 684|b|   emission line flanked by an extremely broad, strong P Cyg-type absorption structure.
 292|a|V1352 Aql  .    This is the "exciting star" of HH 32.  The V, B-V values are means from [288].  The emission spectrum has
 292|b|   been investigated by [40,218,293,294,337,342,423].  Perhaps on account of P Cyg structure, the various W(H@)'s do
 292|c|   not agree well [93,293,423].  No absorption line spectrum is detectable.
 686| |WW Vul     .    Additional UBV/R photometry is in [226,475,529,530].
 293| |LH@ 483-41 .    A 1972 Lick coude plate showed double H@ emission (V<R) superposed upon broad absorption wings.
 687|a|Par 21     .    This object did not appear stellar to visual examination at the 120-inch coude, but rather as a
 687|b|   nebulous blob 3-4" in diameter.  Two 1974 spectrograms showed H@ in absorption.
 689| |V1685 Cyg  .    A comprehensive discussion of the UBV data is in [392].  The spectrum is described in [138,139,203,452].
 692|a|V1515 Cyg  .    The earlier history of this FU Ori-type variable is in [213].  Subsequent spectroscopic observations are
 692|b|   in [27,108,188,190,285].  The UBV data are means for the 1981 season [285].  The coordinates are those given for
 692|c|   "P22" in [83].  A direct image of the nebulosity, and its spectrum, are discussed in [161].
 693| |+41# 3731  .    This may be an ordinary Be star.
 694| |Par 22     .    The star is central in a bipolar nebula.  It is identified as "P22a" in [83].
 696| |PV Cep     .    The star is associated with a variable nebulosity [92,95,313,351].
 697| |AS 442/c   .    The coordinates are of AS-442 itself, a Be star.  The companion is 5" in 45# from the primary [93].
 699| |LkH@ 138   .    LkH@ 138 is the southwest and brighter component of a pair, separation 5" in 48# .
 700| |LkH@ 138/c .    (See the remark for LkH@ 138).
 703|a|V1531,1532 Cyg.  = LkH@ 142, 143: an unresolved pair separated by about 2".5 in 91# .  The coordinates are of the
 703|b|   photocenter.
 708| |LkH@ 151/c .    According to [93], this star is 9" in 20# from LkH@ 151.
 717| |LkH@ 168   .    This may be a background Be star.
 297| |V751 Cyg   .    It is still not clear whether this is a pre-main sequence star or not: see the remarks in HRC.
 298| |LkH@ 172   .    Welin [509] has noted that LkH@ 172 is at the place of the "missing" BD star +43# 3749.
 300|a|V1057 Cyg  .    The best-studied FU Ori-type star; history and references through 1976 are in [213].  UBVR light curves
 300|b|   and references are in [287]; more recent photometry is in [3,87].  Spectroscopic references are: [27,108,188,190,
 300|c|   278,335,337,458,480], and infrared: [3,87].  The fading of the reflection nebula is described in [120].
 302|a|V1331 Cyg  .    The emission spectrum is very rich, and no underlying absorption spectrum is apparent.  The spectrum is
 302|b|   displayed or discussed in [70,72,302,303,337,367].
 726| |HD 200775  .    There is some dispersion in the published spectral classifications: B2.5 [138], B3 V [24], B5 [378].
 305|a|LkH@ 324   .    LkH@ 324 is marked on the HRC identification photograph as the bright star at the nw tip of an elongated
 305|b|   nebulosity.  In fact, the H@ emission was originally detected in the fainter star at the se end: the HRC chart
 305|c|   was marked incorrectly.  As proposed by [73], the "LkH@ 324" identification will remain attached to the nw star,
 305|d|   as in HRC.  H@ emission has actually been observed in this star on two occasions.  Photometry in 1983-85 gave:
 305|e|   V=12.75, B-V=+1.13, U-B=+0.44, with a V range of 12.64-12.83 [279].  Thus the values given in the Table may
 305|f|   refer to a time of temporary brightening at some time between 1975 and 1980.  This object deserves closer
 305|g|   attention.
 727| |LkH@ 324-SE.    See the remark for LkH@ 324; the star at the se edge of the nebula is now designated LkH@ 324-SE.
 729| |LkH@ 349/c .    This companion is approximately 16" in 305# from the brighter star.
 308|a|LkH@ 349   .    The coordinates in HRC are incorrect.  The star is probably no. 60 in Marschall and Van Altena (Astr.J.
 308|b|   94, 71, 1987).  It can be identified in Osterbrock, Ap.J.125, 622, 1957, at 56.5 mm below and 37 mm inside the
 308|c|   upper left corner of Fig.2.  Strong, double P Cyg-type absorption components are present on a Lick coude plate.
 731| |Star in RNO 138.   = star 6 of  [456].
 733|a|V1735 Cyg  .    The star illuminates a red reflection nebula.  P Cyg structure at H@ is clearly detectable on a Lick
 733|b|   coude spectrogram.
 734|a|BH Cep     .    A Lick coude spectrogram shows wide, P Cyg-type structure at H@; some later-type absorption lines are
 734|b|   present, suggesting a type of about F.  A light curve is given by Hoffmeister, Astr.Nach.274, 232, 1944.
 735|a|BO Cep     .    A Lick coude spectrogram shows widely double, sharp emission upon broad H@ absorption wings.  No other
 735|b|   lines except narrow, presumably interstellar, Na I D lines are present in the red.  See the Hoffmeister reference
 735|c|   in the remark for BH Cep for a light curve.
 736|a|SV Cep     .    Lick coude plates show double H@ emission superposed upon broad absorption wings; He I 5875 is present,
 736|b|   and interstellar Na I.  The type may be slightly earlier than A0.  Other classifications are in [205,268,474,530].
 313|a|LkH@ 233   .    Photometry and polarization maps of the nebulosity are in [20].  The object is also known as Markarian
 313|b|      914 [460].
 314| |LkH@ 350   .    This may be an ordinary Be star.
 315|a|DI Cep     .    W(H@) is highly and rapidly variable: [26,91,93,147,173].  Much detailed information on the photometric
 315|b|   and spectroscopic variations is in [147,173].  Spectroscopic observations are in [26,187,257,294,303,413].
 316|a|AS 501     .    [115] found a V range of 12.3-13.1, but [443] saw no variation beyond normal photographic scatter.  H@
 316|b|   emission is strong and double; there are no other emission lines in the red.  Despite the M giant absorption
 316|c|   spectrum, the star does not appear to be a symbiotic.  It is unlike any recognized pre-main sequence star.
 740|a|MWC 1080/c .    [93] gives the separation from MWC 1080 as 10" in 75# , magnitude difference = 4 mag., but the separation
 740|b|   seems to be more nearly 25".
 317|a|MWC 1080   .    This is a hot, high-luminosity object, showing strong He I absorptions, hazy Fe II emission, complex
 317|b|   P Cyg-like emission at H@; the interstellar lines are strong.  Although involved in bright nebulosity, it is not
 317|c|   obvious that this is a pre-main sequence star, although the companion appears to be so.  W(H@) values: [91,93,139].
 318|a|BM And     .    The spectral type given is for the red region; there is some suspicion that it may depend upon wavelength
 318|b|   [212,498].
 323|a|MacC H18 n .    There are two stars at this position; the coordinates given are for the brighter, northeastern of the
 323|b|   pair.  The fainter star is at about 10" in 196# .  It is not obvious whether data of [93] or [90] refer to the
 323|c|   brighter star or to the pair together.
 412| |NTTS 043230+1746 . The position is in error by 10s in RA, position corrected on 16-Mar-2008 at CDS (NTTS-ID is OK)
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