VizieR

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VizieR

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J/ApJS/192/10/table3 Chandra ACIS survey in 383 nearby galaxies. I. (Liu, 2011)
Individual observations of X-ray sources (52542 rows)
  recno=49897
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ColumnValue  Explain   (UCD)
_RAJ200022 37 02.53200 "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+34 25 04.6900 "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 34 45.09259 "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+34 09 29.5096 "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)
_Glon093.71838701 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-20.71935238 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)
49897recno 49897  Record number assigned by the VizieR team. Should Not be used for identification. (meta.record)

Group151   [1/320] Group number (meta.id)
CXOJ223702.532+342504.69  Source name (JHHMMSS.sss+DDMMSS.ss) (Note 1)   (meta.id;meta.main)
IDet2198.s3.34  Individual detection designation (Note 2)   (meta.id;obs)
Exp 30131 s Exposure time after deadtime correction (time.duration;obs.exposure)
MJD51936.696 d Modified Julian Date of observation (time.epoch)
OAA 57 arcsec Off-axis angle (instr.offset)
VigF 0.996  Vignetting factor (Note 3)   (instr.param)
eRA 0.06 arcsec Right Ascension statistical positional error (stat.error)
eDE 0.05 arcsec Declination statistical positional error (stat.error)
ePos 1.0 arcsec Source positional uncertainty (Note 4)   (stat.error)
Sigma 22.5  Detection significance (Note 5)   (stat.likelihood;obs)
Cts 71.9 ct Background-subtracted photon counts (Note 6)   (phot.count;em.X-ray)
e_Cts 8.7 ct Uncertainty in Cts (stat.error)
bgct 1.2 ct Expected background counts (Note 7)   (instr.background)
CMS 0.73   The (M-S)/(H+M+S) X-ray color (Note 8)   (phot.count;arith.ratio)
e_CMS 0.17   Uncertainty in CMS (stat.error)
CHM-0.35   The (H-M)/(H+M+S) X-ray color (Note 8)   (phot.count;arith.ratio)
e_CHM 0.20   Uncertainty in CHM (stat.error)
FX 2.1e-14 mW/m2 Source flux; in erg/s/cm2 (Note 9)   (phot.flux;em.X-ray)
PKS 2.3e-01   Kolmogorov-Smirnov variability probability (Note 10)   (src.var)
SQHhard  Source description (Note 11)   (src.class)

_RA339.260550 deg (i) Positions from CXO names (right ascension part) (pos.eq.ra;meta.main)
_DE+34.417969 deg (i) Positions from CXO names (declination part) (pos.eq.dec;meta.main)
  
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