VizieR

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VizieR

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J/A+A/370/900/table1 BeppoSAX HELLAS survey. IV (Vignali+, 2001)
HELAS sources detected by ROSAT (68 rows)
  recno=44
Post annotation about this record
ColumnValue  Explain   (UCD)
_RAJ200022 41 23.500 "h:m:s" Right ascension (FK5, Equinox=J2000.0) (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services) (pos.eq.ra)
_DEJ2000+29 42 45.00 "d:m:s" Declination (FK5, Equinox=J2000.0) (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services) (pos.eq.dec)
_RAB195022 39 02.655 "h:m:s" Right ascension (FK4, Equinox=B1950.0) (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services) (pos.eq.ra)
_DEB1950+29 27 03.19 "d:m:s" Declination (FK4, Equinox=B1950.0) (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services) (pos.eq.dec)
_Glon091.873027 deg Galactic longitude (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services) (pos.galactic.lon)
_Glat-25.203181 deg Galactic latitude (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services) (pos.galactic.lat)
44recno 44  Record number assigned by the VizieR team. Should Not be used for identification. (meta.record)

HELLAS256  Source identification (meta.id;meta.main)
RAJ200022 41 23.5 "h:m:s" (i) right ascension (J2000) (pos.eq.ra;meta.main)
DEJ2000+29 42 45.0 "d:m:s" (i) Declination (J2000) (pos.eq.dec;meta.main)
Class   Classification (Note 1)   (src.class)
CR 6.23 10-2ct/s Count Rate (phot.count;em.X-ray)
e_CR 0.42 10-2ct/s rms uncertainty on CD (stat.error)
F0-5-2keV 7.30 10-16W/m2 Flux at 0.5-2keV (phot.flux;em.X-ray)
HR1 0.642   Hardness ratio 1 (Note 2)   (phot.flux;arith.ratio)
e_HR1 0.051   rms uncertainty on HR1 (stat.error)
n_HR1    [+] +: HRI data (meta.note)
HR2 0.297   Hardness ratio 2 (Note 2)   (phot.flux;arith.ratio)
e_HR2 0.064   rms uncertainty on HR2 (stat.error)
n_HR2    [+] +: HRI data (meta.note)
ROR701597p  ROR number (meta.id;obs)
Off-axis16.3 arcmin Off-axis angle (instr.offset)
n_Off-axis    [++ ] ++: RASS (meta.note)
Texp 4.3 ks Exposure time (time.duration;obs.exposure)
NHgal 6.45 10+20cm-2 Galactic hydrogen column density from Dickey & Lockman (1990ARA&A..28..215D) (phys.columnDensity)
  
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