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VizieR

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J/ApJS/224/40/counts Catalog of Chandra ACIS point like sources (Wang+, 2016)
Detected X-ray point sources in the Chandra ACIS survey and counts in different bands (tables 3 and 4) (766496 rows)
  recno=587670
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ColumnValue  Explain   (UCD)
_RAJ200020 39 00.4560 "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+42 24 34.632 "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)
_RAB195020 37 13.5803 "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+42 13 56.951 "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)
_Glon081.7439973 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+00.5903342 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)
587670recno 587670  Record number assigned by the VizieR team. Should Not be used for identification. (meta.record)

Group 369   [1/4953] Group Number (meta.id)
CXOGSGJ203900.3+422435  Source name (JHHMMSS.s+DDMMSS) (linked to average properties for this source (table 5)) (meta.id;meta.main)
Det7444.i1.70  Source name in individual observations (Note G1)   (meta.id;obs)
Split    Split fraction (Note G2)   (stat.fit.param)
Exp 48709.6 s [58/192363] Source exposure time after deadtime correction (time.duration;obs.exposure)
MJD54334.145 d Modified Julian Date for the beginning point of the observation (time.epoch)
Dedge 368 pix Distance from the source center to the nearest chip edge. (pos.angDistance)
OAA 364 arcsec Off-axis angle, arcseconds (instr.offset)
VigF 0.858   [0.001/1.3] Vignetting factor (Note 3)   (stat.fit.omc)
e_RAJ2000 0.42 arcsec [0/87] Statistical positional error, Right Ascension (stat.error;pos.eq.ra)
e_DEJ2000 0.40 arcsec [0/3] Statistical positional error, Declination (stat.error;pos.eq.dec)
PosErr 1.45 arcsec [1/36] Source positional uncertainties (Note 4)   (pos)
sig 5.5   [-354/1997] Detection significance (Note 5)   (stat.likelihood;obs)
Cts 29.0 ct [0.1/136000] Background-subtracted photon counts (Note 6)   (phot.count;em.X-ray)
e_Cts 6.9 ct [1/3306] Uncertainty in Cts (stat.error)
bkgd 13.1 ct Background counts within the source region (instr.background;obs.field)
CMS 0.01   [-742/241] X-ray color CMS=(M-S)/(H+M+S) (Note 7)   (phot.count;arith.ratio)
e_CMS 1.00   [0/1] Uncertainty in CMS (stat.error)
CHM 1.03   [-7911/269] X-ray color CHM=(H-M)/(H+M+S) (Note 7)   (phot.count;arith.ratio)
e_CHM 0.08   [0/1] Uncertainty in CHM (stat.error)
FX 2.13e-14  Source flux (Note 8)   (phot.flux;em.X-ray)
PK-S 0.79  K-S probability that a source is constant during an observation (stat.fit.goodness;src.var)
SQHhard  Phase classification for the source (Note 9)   (src.class)
sig/PFFT   Period significance and the most possible period (in second) from FFT algorithm (stat.fit.goodness)
Nae    [2/13] Number of possible afterglow events for sources with total events less than 100 (meta.number)
RAJ2000309.75190 deg (i) Right Ascension in decimal degrees (J2000) (pos.eq.ra;meta.main)
DEJ2000+42.40962 deg (i) Declination in decimal degrees (J2000) (pos.eq.dec;meta.main)
Ct(0.1-1.1) -0.73 ct Source net counts, 0.1-1.1 keV (Note 3)   (phot.count;em.X-ray)
e_Ct(0.1-1.1) 2.38 ct Uncertainty in Ct(0.1-1.1) (Note 3)   (stat.error)
Ct(0.3-1.1) -0.73 ct Source net counts, 0.3-1.1 keV (Note 3)   (phot.count;em.X-ray)
e_Ct(0.3-1.1) 2.38 ct Uncertainty in Ct(0.3-1.1) (Note 3)   (stat.error)
Ct(0.3-1) -0.64 ct Source net counts, 0.3-1 keV (Note 3)   (phot.count;em.X-ray)
e_Ct(0.3-1) 2.38 ct Uncertainty in Ct(0.3-1) (Note 3)   (stat.error)
Ct(0.1-0.5) -0.46 ct Source net counts, 0.1-0.5keV (Note 3)   (phot.count;em.X-ray)
e_Ct(0.1-0.5) 1.89 ct Uncertainty in Ct(0.1-0.5) (Note 3)   (stat.error)
Ct(0.3-0.5) -0.46 ct [-265/11865] Source net counts, 0.3-0.5keV (Note 3)   (phot.count;em.X-ray)
e_Ct(0.3-0.5) 1.89 ct [1/113] Uncertainty in Ct(0.3-0.5) (Note 3)   (stat.error)
Ct(0.1-0.8) -0.27 ct Source net counts, 0.1-0.8 keV (Note 3)   (phot.count;em.X-ray)
e_Ct(0.1-0.8) 2.37 ct Uncertainty in Ct(0.1-0.8) (Note 3)   (stat.error)
Ct(0.3-0.8) -0.27 ct Source net counts, 0.3-0.8 keV (Note 3)   (phot.count;em.X-ray)
e_Ct(0.3-0.8) 2.37 ct Uncertainty in Ct(0.3-0.8) (Note 3)   (stat.error)
Ct(1-2) -0.28 ct Source net counts, 1-2 keV (Note 3)   (phot.count;em.X-ray)
e_Ct(1-2) 2.72 ct Uncertainty in Ct(1-2) (Note 3)   (stat.error)
Ct(1.1-2) -0.19 ct Source net counts, 1.1-2 keV (Note 3)   (phot.count;em.X-ray)
e_Ct(1.1-2) 2.72 ct Uncertainty in Ct(1.1-2) (Note 3)   (stat.error)
Ct(0.5-2.4) -0.19 ct Source net counts, 0.5-2.4 keV (Note 3)   (phot.count;em.X-ray)
e_Ct(0.5-2.4) 3.27 ct Uncertainty in Ct(0.5-2.4) (Note 3)   (stat.error)
Ct(0.5-2) -0.46 ct Source net counts, 0.5-2 keV (Note 3)   (phot.count;em.X-ray)
e_Ct(0.5-2) 3.02 ct Uncertainty in Ct(0.5-2) (Note 3)   (stat.error)
Ct(0.8-2) -0.64 ct Source net counts, 0.8-2 keV (Note 3)   (phot.count;em.X-ray)
e_Ct(0.8-2) 2.73 ct Uncertainty in Ct(0.8-2) (Note 3)   (stat.error)
Ct(2-8) 41.44 ct Source net counts, 2-8 keV (Note 3)   (phot.count;em.X-ray)
e_Ct(2-8) 8.18 ct Uncertainty in Ct(2-8) (Note 3)   (stat.error)
Ct(0.1-8) 40.53 ct Source net counts, 0.1-8 keV (Note 3)   (phot.count;em.X-ray)
e_Ct(0.1-8) 8.41 ct Uncertainty in Ct(0.1-8) (Note 3)   (stat.error)
Ct(0.3-8) 40.53 ct Source net counts, 0.3-8 keV (Note 3)   (phot.count;em.X-ray)
e_Ct(0.3-8) 8.41 ct Uncertainty in Ct(0.3-8) (Note 3)   (stat.error)
  
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