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

  
J/ApJS/280/24
  Halpha emission-line stars & YSOs from LAMOST MRS (Tan+, 2025)
ReadMe+ftp
2025ApJS..280...24T
Similar Catalogs
Post annotation 		img(gal)
1.J/ApJS/280/24/table3(c)Basic information of the 41,996 H{alpha} emission line stars (41996 rows)
2.J/ApJS/280/24/table4(c)Basic information of the 4,255 YSO candidates and the 78 sources potentially contaminated by LPV (4333 rows)
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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. (meta.record)
   (ALL)OBSID  (i) [588903058/1127014206] LAMOST observation identifier (meta.id;obs)
  (1)YSOc (char) data for the YSO candidates and potentially LPV contaminated sources (link to Table 4) (meta.ref.url)
   (ALL)LAMOST (char) LAMOST designation (JHHMMSS.ss+DDMMSS.s) (meta.id;meta.main)
   (ALL)RAJ2000 deg (i) Right Ascension (J2000) (pos.eq.ra;meta.main)
   (ALL)DEJ2000 deg (i) [-11/88.5] Declination (J2000) (pos.eq.dec;meta.main)
   (ALL)Gaia  (n) Gaia DR3 identifier (meta.id.cross)
  (1)OType (char) Type from SIMBAD cross-matching (src.class)
  (1)Type (char) Type from visual inspection (Note 1)   (src.class)
  (1)Simbad (char) ask the Simbad data-base about this object (meta.ref.url)
  (2)f_OBSID (char) [*?] Flag on OBSID (Note 1)   (meta.code)

ALL cols		    
(n) indicates a possible blank or NULL column(i)indexed column
  (2)[NII]   [0/1] Detection of the [NII]6548+6583A lines (1=line was observed; 0=not detected) (meta.code)
  (2)[OI]   [0/1] Detection of the [OI]6300+6364A lines (1=line was observed; 0=not detected) (meta.code)
  (2)HeI   [0/1] Detection of the HeI6678A line (1=line was observed; 0=not detected) (meta.code)
  (2)[SII]   [0/1] Detection of the [SII]6717+6731A lines (1=line was observed; 0=not detected) (meta.code)
  (2)EW 0.1nm [-242.7/0] H{alpha} equivalent width; Angstroms (spect.line.eqWidth)

ALL cols		    
(n) indicates a possible blank or NULL column(i)indexed column
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