II/212A     A Finding List of Faint UV-Bright Stars        (Lanning+, 1998)
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A Finding List of Faint UV-Bright Stars in the Galactic Plane
    Lanning H.H.
   <Publ. Astron. Soc. Pac. 85, 70 (1973)>
   =1973PASP...85...70L
A Finding List of Faint UV-Bright Stars in the Galactic Plane II
    Lanning H.H., Meakes M.
   <Publ. Astron. Soc. Pac. 106, 38 (1994)>
   =1994PASP..106...38L
A Finding List of Faint UV-Bright Stars in the Galactic Plane III
    Lanning H.H., Meakes M.
   <Publ. Astron. Soc. Pac. 107, 751 (1995)>
   =1995PASP..107..751L
A finding list of faint UV-bright stars in the Galactic plane. IV.
    Lanning H.H
   <Publ. Astron. Soc. Pac. 110, 586 (1998)>
   =1998PASP..110..586L
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ADC_Keywords: Galactic plane; Photometry, UBV; Surveys ; Ultraviolet ;


Abstract:
    195 UV-bright stars have been found on two-color 48-inch Schmidt plates
    centered on the galactic plane, and on one high-latitude plate. This
    catalog contains sources with (U-B) in the range U-B=0 to U-B=-1.5.

Introduction:
    The Sandage two-color photographic survey was originally made in
    support of the UHURU x-ray satellite in order to identify those
    optical counterparts of the detected x-ray sources found in the
    galactic plane. During inspection of the plates, however, many
    UV-bright objects fainter than 10th magnitude were seen in the general
    field. A larger image in the U filter suggested the possibility of a
    bluer object as in the case of low-luminosity stars, white dwarfs,
    novae, CVs, normal early B stars, etc. As these are interesting in
    themselves, it was decided to publish a catalog for the use of other
    observers. This multi-color photographic technique has been described,
    for example, by Haro and Herbig (1955).

    The survey was concentrated on objects with m(B)~10 or fainter. It
    employed the Palomar 48-in (Oschin) Schmidt telescope and was centered
    on the galactic plane with overlapping regions covering the galactic
    latitudes +- 9 degrees, and extending throughout most of the northern
    plane (l = 0 deg - 227 deg). Plates were taken by J. Kristian, A.R.
    Sandage, R.J. Brucato, and Lanning, primarily.

    The data presented here were found following a careful examination
    of the plates but it should not be assumed these data represent a
    complete survey of the fields examined.

    The categories were roughly calibrated against photoelectric (U-B)
    measures, but a full scale calibration program, including magnitude
    effects, etc. was not done. The numerical (U-B) limits of the tables
    should not therefore be taken precisely.

    The blue magnitude of the sources in the finding list has been
    estimated using these photoelectric values as a guide but should be
    considered accurate to only +- 0.5 mag. due to the difficulty of
    adjusting to the various plate characteristics. Positions were
    measured from images retrieved from the Space Telescope Science
    Institute collection of Guide Star digital plate scans. The accuracy
    of positions from the Guide Star Catalog images has been estimated to
    be on the order of 0.2-0.8 arcsec
    (Russell et al. 1990)

    Information provided by Bidelman (private communication) resulted in
    the discovery that 15 positions for objects listed in Paper II were in
    error. Investigation indicated that an incorrect header was associated
    with the scan of the Guide Star plate originally archived onto optical
    disk. The incorrect astrometric solution, based on the use of an
    incorrect origin point, was subsequently applied in the positional
    determination when centroiding the object. The average offset for
    positions in right ascension is 14.17 seconds of time, with no
    detectable trend in the numbers. The offsets in declination range from
    +6.56 arcseconds through zero to -6.85 arcseconds as one progresses
    from west to east across the plate. This is consistent with a rotation
    being introduced into the bad plate solution. Objects with incorrect
    positions included Lanning 96, 97, 98, 99, 100, 102, 104, 108, 111,
    113, 114, 115, 116, 119, and 122. uv.dat contains the corrected
    coordinates.

File Summary:

       FileName      Lrecl  Records   Explanations

ReadMe            80        .   This file
uv.dat            43      351   The stars with strong UV images
notes.dat         79      237   Notes on individual stars


Byte-by-byte Description of file:  uv.dat

   Bytes Format   Units     Label     Explanations

   1-  3  I3      ---       ID        [1,351]+ Lanning number
       4  A1      ---       rem       "*" indicates a note in notes.dat
   6-  7  I2      h         RAh       Hours of Right Ascension (J2000)
   9- 10  I2      min       RAm       Minutes of Right Ascension (J2000)
  12- 16  F5.2    s         RAs       Seconds of Right Ascension (J2000)
      18  A1      ---       DE-       Sign of declination
  19- 20  I2      deg       DEd       Degrees of declination (J2000)
  22- 23  I2      arcmin    DEm       Minutes of declination (J2000)
  25- 29  F5.2    arcsec    DEs       Seconds of declination (J2000)
  32- 36  F5.2    mag       Bmag      ? Approximate blue magnitude
      37  A1      ---       u_Bmag    : indicates B is uncertain
  39- 42  F4.1    mag       U-B       ? Approximate U-B
      43  A1      ---       u_U-B     : indicates U-B is uncertain


Byte-by-byte Description of file:  notes.dat

   Bytes Format     Units    Label     Explanations

   1-  3  I3        ---      ID       *[1,351]+= Lanning number
   5- 78  A74       ---      Text      Text of Note

Note on ID:
   The Lanning number is repeated when the text is longer than 75 characters.


History:
  * 10-Feb-1997: Papers I, II and III (Lanning numbers 1-195)
  * 07-Aug-1998: Paper IV appended (Lanning numbers 196-351) at CDS

Acknowledgments:
    The original author would like to thank Dr. R. J. Brucato for his
    assistance in the examination of some of the photographic plates for
    this two-color survey. Lanning and Meakes are very grateful to Dr.
    Peter Pesch for providing information regarding his unpublished
    observations of the high latitude sources noted in the text. They give
    special thanks to Dr. Allan Sandage for the opportunity to continue
    this survey. They also extend a special thanks to Dr. W. P. Bidelman
    who provided useful comments and information regarding the sources.
    They also greatly appreciate the ground-based observations taken by
    Dr. Alan Shafter (SDSU) and IUE data obtained by Dr. Al Schultz
    (CSC/STScI) in clarifying the classification of Lanning 185.

    The undersigned thanks Dr. Lanning for his help and particularly for a
    careful review of the finished files.

References:
   Blanco, V. M., Demers, S., Douglass, G. G., and FitzGerald, M. P. 1970,
      Pub. U.S. Naval Obs. 21, 1 (2nd series)
   Downes, R. A. 1986, ApJS, 61, 569 =1986ApJS...61..569D
   Downes, R. A. & Shara M.M., 1993 PASP 105, 127 =1993PASP..105..127D,
                                                   Cat. V/79
   Garnavich, P. M., Szkody, P., Mateo, M., Feinswog, L., Booth, J.,
      Goodrich, B., Miller, H. R., Carini, M. T., and Wilson, J. W.  1990,
      ApJ, 365, 696 =1990ApJ...365..696G
   Giclas, H. L., Burnham, R., Jr., and Thomas, N. G. 1971, Lowell Proper
      Motion Survey-Northern Hemisphere. The G Numbered Stars. (Flagstaff:
      Lowell Observatory).
   Greenstein, J. L. 1984, ApJ, 276, 602 =1984ApJ...276..602G
   Grueff, G., and Vigotti, M. 1972, Astr. and Ap. Suppl., 6, 1 (No. 1)
      =1972ApJS....6....1G
   Haro, G. and Herbig, G.H. 1955, Bol. Obs. Tonantzintla y Tacubaya, 12,
      33 =1955BOTT...12...33H
   Heckathorn, J. N., Fesen, R. A., and Gull, T. R. 1982, A&AS, 114, 414
      =1982A&AS..114..414H
   Horne K., Lanning H. H., Gomer R. H. 1982, Astr. J., 252, 681.
      =1982ApJ...252..681H
   Kukarkin, B. V., Kholopov, P. N., Efremov, Yu. N., Kukarkina, N. P.,
      Kurochkin, N. E., Medvedeva, G. I., Perova, N. B., Fedorovich, V. P.,
      and Frolov, M. S. 1970, General Catalogue of Variable Stars, 3rd ed.
      (Moscow: U.S.S.R. Academy of Sciences).
   Liller, W. 1972, I.A.U. Circ. No. 2415. =1972IAUC.2415.....L
   Luyten, W. J. 1963, Bruce Proper Motion Survey - The general Catalogue 2
      (Minneapolis: University of Minnesota).
   McCook, G. P. and Sion, E. M. 1987 ApJS, 65, 603 =1987ApJS...65..603M
   Perek, L., and Kohoutek, L. 1967, Catalogue of Galactic Planetary
      Nebulae (Prague: Czechoslovak Academy of Sciences).
   Pounds, K. A., Allan, D. J., Barber, C., Barstow, M. A., Bertram, D.,
      Branduardi-Raymont, G., Brebner, G.E.C., Buckley, D., Bromage, G.E.,
      Cole, R.E., Courtier, M., Cruise, A.M., Culhane, J.L., Denby, M.,
      Donoghue, D.O., Dunford, E., Georgantopoulos, I., Goodall, C.V.,
      Gondhalekar, P.M., Gourlay, J.A., Harris, A.W., Hassall, B.J.M.,
      Hellier, C., Hodgkin, S., Jeffries, R.D., Kellett, B.J., Kent, B.J.,
      Lieu, R., Lloyd, C., McGale, P., Mason, K.O., Matthews, L., Mittaz,
      J.P.D., Page, C.G., Pankiewicz, G.S., Pike, C.D., Ponman, T.J.,
      Puchnarewicz, E.M., Pye, J.P., Quenby, J.J., Ricketts, M.J., Rosen,
      S.R., Sansom, A.E., Sembay, S., Sidher, S., Sims, M.R., Stewart,
      B.C., Sumner, T.J., Vallance, R.J., Watson, M.G., Warwick, R.S.,
      Wells, A.A., Willingale, R., Willmore, A.P., Willoughby, G.A. and
      Wonnacott, D. 1993, MNRAS, 260, 77 = 1993MNRAS.260...77P
   Russell, J.L., Lasker, B.M., McLean, B.J., Sturch, C.R., and Jenkner, H.
      1990, AJ, 99, 2059 =1990AJ.....99.2059R
   Shafter, A. W., Lanning, H. H., and Ulrich, R. K. 1983, PASP, 95, 206
      =1983PASP...95..206S
   Stephenson, C. B., and Sanduleak, N. 1977 ApJS, 33, 459 =1977ApJS..33..459S
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(End)        N. G. Roman        [ADC/SSDOO]                          10-Feb-1997