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=42488
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ColumnValue  Explain   (UCD)
_RAJ200003 26 16.95600 "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)
_DEJ2000-21 20 06.0000 "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)
_RAB195003 24 03.65684 "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)
_DEB1950-21 30 32.7380 "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)
_Glon212.18165573 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-54.36737312 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)
42488recno 42488  Record number assigned by the VizieR team. Should Not be used for identification. (meta.record)

Group 56   [1/320] Group number (meta.id)
CXOJ032616.956-212006.00  Source name (JHHMMSS.sss+DDMMSS.ss) (Note 1)   (meta.id;meta.main)
IDet2915.s3.u  Individual detection designation (Note 2)   (meta.id;obs)
Exp 18515 s Exposure time after deadtime correction (time.duration;obs.exposure)
MJD52535.122 d Modified Julian Date of observation (time.epoch)
OAA140 arcsec Off-axis angle (instr.offset)
VigF 0.819  Vignetting factor (Note 3)   (instr.param)
eRA  arcsec Right Ascension statistical positional error (stat.error)
eDE  arcsec Declination statistical positional error (stat.error)
ePos  arcsec Source positional uncertainty (Note 4)   (stat.error)
Sigma -9.8  Detection significance (Note 5)   (stat.likelihood;obs)
Cts 139.8 ct Background-subtracted photon counts (Note 6)   (phot.count;em.X-ray)
e_Cts 14.3 ct Uncertainty in Cts (stat.error)
bgct  ct Expected background counts (Note 7)   (instr.background)
CMS    The (M-S)/(H+M+S) X-ray color (Note 8)   (phot.count;arith.ratio)
e_CMS    Uncertainty in CMS (stat.error)
CHM    The (H-M)/(H+M+S) X-ray color (Note 8)   (phot.count;arith.ratio)
e_CHM    Uncertainty in CHM (stat.error)
FX 7.8e-14 mW/m2 Source flux; in erg/s/cm2 (Note 9)   (phot.flux;em.X-ray)
PKS    Kolmogorov-Smirnov variability probability (Note 10)   (src.var)
SQH   Source description (Note 11)   (src.class)

_RA051.570650 deg (i) Positions from CXO names (right ascension part) (pos.eq.ra;meta.main)
_DE-21.335000 deg (i) Positions from CXO names (declination part) (pos.eq.dec;meta.main)
  
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