VizieR

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VizieR

Simple TargetList Of TargetsFast Xmatch with large catalogs or Simbad
Target Name (resolved by Sesame) or Position:
 Target dimension:
NB: The epoch used for the query is the original epoch of the table(s)Radius Box size

  
J/ApJS/249/22
  Radial velocity variable stars from LAMOST DR4 (Tian+, 2020)
ReadMe+ftp
2020ApJS..249...22T
Similar Catalogs
timeSerie
Post annotation 		img(gal)
1.J/ApJS/249/22/catalog(c)Catalog of radial velocity (RV) variable star candidates[timeSerie] (80702 rows)
2.J/ApJS/249/22/epochs(c)Measurements per epoch (extracted from catalog.dat by CDS) (304473 rows)
Help Xmatch is

Simple ConstraintList Of Constraints
 
Query by Constraints constraints help applied on Columns (Output Order: + - )
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Column  Constraint Explain   (UCD)
  (ALL)recno  Record number assigned by the VizieR team. Should Not be used for identification. ((unassigned);phys.veloc.orbital;arith.diff;phys.veloc)
   (ALL)RAJ2000 deg (i) Right ascension (J2000) (RA) ((unassigned);phys.veloc.orbital;arith.diff;(unassigned);arith)
   (ALL)DEJ2000 deg (i) [-9.5/87] Declination (J2000) (DEC) ((unassigned);(unassigned);(unassigned);(unassigned);arith)
  (1)GLON deg Galactic longitude (L) ((unassigned);(unassigned);(unassigned);(unassigned);meta.main)
  (1)GLAT deg Galactic latitude (B) (pos.cylindrical;(unassigned);arith.factor;(unassigned))
  (1)Nep   [2/47] Number of epochs of the object (EPOCH) ((unassigned);phys.veloc.orbital;arith.diff;src.var)
  (1)Dur d [0.0075/1611] Time span of observation for the object (DURATION) ((unassigned);(unassigned);(unassigned);phys.polarization.circular;stat.median)
  (1)DeltaT d [-1603/1611] {Delta}t between epochs with max and min RV (DT) ((unassigned);phys.veloc.orbital;arith.diff;obs.calib.dark;meta.main)
  (1)dRV km/s [9.8/415] Maximum RV difference between any two epochs (DRV_MAX) ((unassigned);phys.veloc.orbital;arith.diff;spect.index;instr.bandpass)
  (1)dlogg [cm/s2] [-5.15/4.82] logg between epochs with max and min RV (DLOGG) ((unassigned);(unassigned);(unassigned);(unassigned);instr.background)
  (1)dTeff K [-18681/16743] {Delta}Teff between epochs with max and min RV (DTEFF) ((unassigned);(unassigned);(unassigned);em.radio;instr.background)

ALL cols		    
 (i)indexed column
  (1)dFeH [-] [-3.3/3.8] {Delta}[Fe/H] between epochs with max and min RV (DFEH) ((unassigned);phys.veloc.orbital;arith.diff;phys.reflectance;pos.lsr;arith.ratio)
  (1)Chi2   [0.16/1095] Chi square of RVs calculated with equation 4 (CHIS) (Note 1)   ((unassigned);phys.veloc.orbital;arith.diff;time.resolution;meta.main)
   (ALL)RV km/s [-939/777] Weighted radial velocity via equation 1 (WMRV) (Note 2)   (phys.absorption;phys.size;arith.factor;spect.index;src.orbital.meanMotion;meta.main)
   (ALL)e_RV km/s [3/17.1] Weighted RV error via equation 3 (WMRVERR) (Note 3)   ((unassigned);phys.veloc.orbital;arith.diff;time.age;meta.main)
  (1)SpecId (char) LAMOST unique spectral ID for epoch of target (SPEC_ID) ((unassigned);phys.veloc.orbital;arith.diff;spect.line.veloc;arith)
  (1)RVmax   [0/40] Index of RV_EPOCH responding for max RV (INDMM1) ((unassigned);(unassigned);(unassigned);src.var)
  (1)RVmin   [0/39] Index of RV_EPOCH responding for min RV (INDMM2) ((unassigned);(unassigned);(unassigned);src.var)
  (1)PV   [0.6/0.95] Probability of being a RV variable star ((unassigned);phys.veloc.orbital;arith.diff;phys.polarization.circular;meta.main)
  (1)Type (char) Variability types ((unassigned);(unassigned);(unassigned);pos.cartesian;meta.main)
  (1)KIC  (n) Kepler identifier (see V/133) ((unassigned);(unassigned);(unassigned);src.class.starGalaxy)
  (1)Gaia  (n) GAIA identifier for 203 sources (see I/345) (GAIASOURCEID) ((unassigned);(unassigned);(unassigned);src.class.starGalaxy)
  (1)OName (char) VSX name (see B/vsx) for 3044 sources (VSX_NAME) ((unassigned);(unassigned);(unassigned);phys.veloc.dispersion;(unassigned))
  (1)GCVS (char) GCVS Constellation numeric code (bytes 1-2), Star Number within constellation (bytes 3-6) (see B/gcvs) (GCVSCONNUM) ((unassigned);(unassigned);(unassigned);spect.line.veloc)

ALL cols		    
(n) indicates a possible blank or NULL column(i)indexed column
  (1)ASASSN-V (char) ASAS-SN name for 2011 sources (see II/366) (ASASSN_NAME) ((unassigned);(unassigned);(unassigned);src.class.starGalaxy)
  (1)LAMOST (char) Display the LAMOST-DR4 data (V/153) ((unassigned);(unassigned);(unassigned);pos.geocentric)
  (1)RVc (char) Interactive velocity plot ((unassigned);phys.veloc.orbital;arith.diff;pos.geocentric)
  (2)JD d (i) Julian Day of exposure of the SpecId (JULS_EPOCH) ((unassigned);(unassigned);(unassigned);pos.centroid;(unassigned);meta.main)
  (2)SNR  (n) [10/2329] S/N(4650A) per pixel in blue arm of epochs (SNRB_EPOCH) ((unassigned);(unassigned);(unassigned);meta.abstract;meta.main)
  (2)logg [cm/s2] (n) [-1.1/6.42] log of surface gravity (LOGG_EPOCH) ((unassigned);phys.veloc.orbital;arith.diff;(unassigned))
  (2)e_logg [cm/s2] (n) [0.05/0.42] logg uncertainty (ERRLOGGEPOCH) ((unassigned);phys.veloc.orbital;arith.diff;time.age;meta.main)
  (2)Teff K (n) [3402/23942] Effective temperature (TEFF_EPOCH) ((unassigned);(unassigned);(unassigned);em.radio)
  (2)e_Teff K (n) [58/660] Teff uncertainty (ERRTEFFEPOCH) ((unassigned);(unassigned);(unassigned);time.age;em.radio.20-100MHz)
  (2)[Fe/H] [-] (n) [-3.7/1.7] Metallicity (FEH_EPOCH) ((unassigned);(unassigned);(unassigned);pos.emergenceAng)
  (2)e_[Fe/H] [-] (n) [0.05/0.6] Error of [Fe/H] (ERRFEHEPOCH) ((unassigned);(unassigned);(unassigned);time.age;phys.reflectance.bidirectional)
  (2)[a/Fe] [-] (n) [-0.4/0.8] Abundance [alpha/Fe] (AFE_EPOCH) ((unassigned);(unassigned);(unassigned);phys.polarization.stokes.Q)
  (2)e_[a/Fe] [-] (n) [0.026/0.3] Error of [alpha/Fe] (ERRAFEEPOCH) ((unassigned);(unassigned);(unassigned);time.age;phys.polarization.stokes.U)

ALL cols		    
(n) indicates a possible blank or NULL column(i)indexed column
Adapt form
 Display your selection only Reset to default columns
usage  Display UCD1+    UCD1  

The following problems were encountered in this VizieR run:
****Error execute query: UPDATE METAstat set nother=nother+1, tother=846436834 Where phase=3 and catid=22490022
**** 
**** --POSTGRES MSG db=0
**** Report from: stdb_pg,     Status: STDB_ERR 
****ERROR:  invalid page in block 0 of relation base/16403/6104 
****ERROR:  invalid page in block 0 of relation base/16403/6104 
****Error execute query: UPDATE METAstat set nother=nother+1, tother=846436834 Where phase=3 and catid=22490022
**** 
**** --POSTGRES MSG db=0
**** Report from: stdb_pg,     Status: STDB_ERR 
****ERROR:  invalid page in block 0 of relation base/16403/6104 
****ERROR:  invalid page in block 0 of relation base/16403/6104
If you can't find a solution, report to CDS and insert into your message the following details:

.errorfile=/tmp/VR111448.err (2026-10-27T17:20:32)
-3
-source=J/ApJS/249/22
-ref=VIZ6ae0dd611b358
elapse time 3