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J/ApJS/253/7
  A full-sky census of brown dwarfs within 20pc (Kirkpatrick+, 2021)
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2021ApJS..253....7K
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1.J/ApJS/253/7/tablea1(c)Amassed spectroscopic, astrometric, and photometric data for objects listed in Tables 5-11 (682 rows)
2.J/ApJS/253/7/table1(c)New L, T, and Y dwarf candidates (85 rows)
3.J/ApJS/253/7/table2Objects on the IRAC ch2 Spitzer Parallax Programs (361 rows)
4.J/ApJS/253/7/table4(c)Astrometry on the Gaia DR2 Reference Frame (9425 rows)
5.J/ApJS/253/7/plx(c)Parallax and motion fits for objects with high-quality (Table 5), low-quality (Table 6) and poor-quality (Table 7) parallaxes (361 rows)
6.J/ApJS/253/7/table8Ancillary Spitzer photometry (96 rows)
7.J/ApJS/253/7/table9Spectroscopic follow-up (51 rows)
8.J/ApJS/253/7/table10Other objects considered for the 20-pc census (153 rows)
9.J/ApJS/253/7/table11(c)The full-sky 20-pc census of L, T, and Y dwarfs (known as of 2020 Oct) (526 rows)
10.J/ApJS/253/7/table12Potentially young L, T, and Y dwarfs within 20pc of the Sun (70 rows)
11.J/ApJS/253/7/table14Late-M, L, T, and Y dwarfs with Teff measurements (170 rows)
12.J/ApJS/253/7/table16Masses for L, T, and Y members of the 20-pc census (32 rows)
13.J/ApJS/253/7/refsReferences (320 rows)

Simple ConstraintList Of Constraints
 
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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)
  (1)T (char) Table listing (Note 1)   (meta.note)
  (1+11+12)Name (char) Short name used in other tables (Note 2)   (meta.id)
  (1)SpTO  (n) [-2/19] Optical spectral type (Note 3)   (src.spType)
  (1+11)SpTIR  (n) [-1/22] Near-IR spectral type (Note 3)   (src.spType)
  (1)SpAd   [-9/24] Adopted spectral type (Note 3)   (src.spType)
   (1+9)r_SpTO (char) Source of the optical spectral type (see refs.dat file) (meta.ref;pos.frame)
   (1+9)r_SpTIR (char) Source of the NIR spectral type (see refs.dat file) (meta.ref;pos.frame)
  (1+5+8+9+11)plx mas (n) [-12.4/502] Best measured trigonometric parallax (Note 4)   (pos.parallax.trig)
  (1+5+8+9+11)e_plx mas (n) [0.019/73] Uncertainty in plx (Note 4)   (stat.error;pos.parallax)
  (1+5)pmRA mas/yr (n) [-8124/3968] Best measured proper motion, in RA (Note 4)   (pos.pm;pos.eq.ra)

ALL cols		    
(n) indicates a possible blank or NULL column(i)indexed column
  (1+5)e_pmRA mas/yr (n) [0.03/101] Uncertainty in pmRA (Note 4)   (stat.error;pos.pm;pos.eq.ra)
  (1+5)pmDE mas/yr (n) [-3108/1685] Best measured proper motion, in DE (Note 4)   (pos.pm;pos.eq.dec)
  (1+5)e_pmDE mas/yr (n) [0.03/101] Uncertainty in pmDE (Note 4)   (stat.error;pos.pm;pos.eq.dec)
  (1+9)AS (char) Source of the astrometry (see refs.dat file) (meta.bib)
  (1)JMKO mag (n) [11.4/27] J-band photometry on the MKO system (phot.mag;em.IR.J)
  (1)e_JMKO mag (n) [0.01/0.8] Uncertainty in JMKO (stat.error)
  (1)Jmag mag (n) [10.7/21] J-band photometry one the 2MASS system (phot.mag;em.IR.J)
  (1)e_Jmag mag (n) [0.01/0.6] Uncertainty in Jmag (stat.error;phot.mag)
  (1+11)Hmag mag (n) [9.5/25.3] H-band photometry on either the MKO or 2MASS system (phot.mag;em.IR.H)
  (1+11)e_Hmag mag (n) [0.01/0.5] Uncertainty in Hmag (stat.error;phot.mag)
  (1)KMKO mag (n) [10/23.5] K-band photometry on the MKO system (phot.mag;em.IR.K)
  (1)e_KMKO mag (n) [0.01/0.5] Uncertainty in KMKO (stat.error)
  (1)Ksmag mag (n) [8.8/19.2] Ks-band photometry on the 2MASS system (phot.mag;em.IR.K)

ALL cols		    
(n) indicates a possible blank or NULL column(i)indexed column
  (1)e_Ksmag mag (n) [0.01/0.6] Uncertainty in Ksmag (stat.error;phot.mag)
  (1)PhotS (char) Source of the near-IR photometry (Note 5)   (meta.bib)
  (1)RACdeg deg CatWISE2020 Right Ascension (J2000) at Ep=57170 (Note 6)   (pos.eq.ra)
  (1)DECdeg deg CatWISE2020 Declination (J2000) at Ep=57170 (Note 6)   (pos.eq.dec)
  (1)pmRAC2 mas/yr (n) [-8/2.7] CatWISE2020 measured proper motion in RA (pos.pm;pos.eq.ra)
  (1)e_pmRAC2 mas/yr (n) [0.002/0.3] Uncertainty in pmRAC2 (stat.error;pos.pm;pos.eq.ra)
  (1)pmDEC2 mas/yr (n) [-3.5/1.7] CatWISE2020 measured proper motion in DE (pos.pm;pos.eq.dec)
  (1)e_pmDEC2 mas/yr (n) [0.002/0.3] Uncertainty in pmDEC2 (stat.error;pos.pm;pos.eq.dec)
  (1)W1magC2 mag (n) [7.9/20] CatWISE2020 moving-object PSF-fit W1 band photometry (phot.mag;em.IR.3-4um)
  (1)e_W1magC2 mag (n) [0.004/0.6] Uncertainty in W1magC2 (stat.error)
  (1)W2magC2 mag (n) [7.3/16.7] CatWISE2020 moving-object PSF-fit W2 band photometry (phot.mag;em.IR.4-8um)
  (1)e_W2magC2 mag (n) [0.004/0.2] Uncertainty in W2magC2 (stat.error)
  (1)plxC2 mas (n) [-1/0.6] CatWISE2020 par_pm parallax estimate (Note 7)   (pos.parallax.trig)

ALL cols		    
(n) indicates a possible blank or NULL column(i)indexed column
  (1)e_plxC2 mas (n) [0.01/0.4] Uncertainty in plxC2 (Note 7)   (stat.error)
  (1)C2S (char) Source of the CatWISE2020 data (Note 8)   (meta.bib)
  (1)W1mag mag (n) [7.8/20.1] cISE stationary-object PSF-fit W1 band photometry (phot.mag;em.IR.3-4um)
  (1)e_W1mag mag (n) [0.01/0.6] Uncertainty in W1mag (stat.error;phot.mag)
  (1)W2mag mag (n) [7.2/17] WISE stationary-object PSF-fit W2 band photometry (phot.mag;em.IR.4-8um)
  (1)e_W2mag mag (n) [0.008/0.3] Uncertainty in W2mag (stat.error;phot.mag)
  (1)W3mag mag (n) [6.2/13.5] WISE stationary-object PSF-fit W3 band photometry (phot.flux.density;em.IR.8-15um)
  (1)e_W3mag mag (n) [0.01/0.6] Uncertainty in W3mag (stat.error;phot.mag)
  (1)WS (char) Source of the stationary-object photometry (Note 9)   (meta.bib)
  (1)ch1mag mag (n) [7.5/19.7] Spitzer channel 1 (3.6um) photometry (phot.mag;em.IR.3-4um)
  (1)e_ch1mag mag (n) [0.01/0.3] Uncertainty in ch1mag (stat.error;phot.mag)
  (1)ch2mag mag (n) [7.4/17] Spitzer channel 2 (4.5um) photometry (phot.mag;em.IR.4-8um)
  (1)e_ch2mag mag (n) [0.01/0.06] Uncertainty in ch2mag (stat.error;phot.mag)

ALL cols		    
(n) indicates a possible blank or NULL column(i)indexed column
  (1)S (char) Source of Spitzer photometry (Note 10)   (meta.bib)
  (1)N (char) [MSY] Note (Note 11)   (meta.note)
  (1+5+9)FName (char) Full discovery designation of the system (Note 2)   (meta.id;meta.main)
   (1+2+3+4+5+6+7+8+9+10+11+12)PName (char) (i) Short name position code for object (HHMM+DDMM; J2000) as in other tables; column added by CDS (meta.id)
  (1+3+9+10+11+12)m_PName (char) Component for object (meta.code.multip)
  (1)New  (n)New candidate (link to Table 1) (meta.ref.url)
  (1)Nc  (n)Number of astrometry measurements for this star (link to Table 4) (meta.number)
  (1+9)SimbadName (char) (n)Designation understandable by the Simbad data-base (meta.id)
  (1+2+9)_RA deg (i) Right Ascension (J2000) from SIMBAD (not part of the original data) (pos.eq.ra;meta.main)
  (1+2+9)_DE deg (i) Declination (J2000) from SIMBAD (not part of the original data) (pos.eq.dec;meta.main)
  (2)CWISE (char) CWISE position-based identifier (JHHMMSS.ss+DDMMSS.s) (meta.id;meta.main)
  (2)f_CWISE (char) b: background (Note 1)   (meta.code)
  (2+9)Note (char) Note (Note 2)   (meta.note)

ALL cols		    
(n) indicates a possible blank or NULL column(i)indexed column
  (2)Disc (char) Discoverer code (Note 3)   (meta.code)
  (2)Simbad (char) ask the Simbad data-base about this object (meta.ref.url)
  (3+6+7+8+9+10)Cat (char) Catalog used for PName (WISE, CWISE, 2MASS, SDSS, PSO, ULAS, CFBDS, SIMP, VHS, UGPS or PM) (instr.setup;meta.table)
  (3)FirstObs "Y:M:D" [2004/2019] First observation date, year (time.epoch;obs)
  (3)LastObs "Y:M:D" [2018/2020] Last observation date, year (time.epoch;obs)
  (3)Base yr [0.5/15] Baseline in years (Note 1)   (time.interval)
  (3)Epochs (char) Spitzer IRAC program # (# epochs in program) (meta.id;obs)
  (4+5)RA_ICRS deg (i) [1.3/359.4] Right Ascension (ICRS) at Ep=MJD (pos.eq.ra;meta.main)
  (4+5)DE_ICRS deg (i) [-82.2/84.8] Declination (ICRS) at Ep=MJD (pos.eq.dec;meta.main)
  (4)e_RA_ICRS arcsec [0.01/2.5] Positional uncertainty in RA (stat.error;pos.eq.ra)
  (4)e_DE_ICRS arcsec [0.01/2.5] Positional uncertainty in DE (stat.error;pos.eq.dec)
  (4)Src (char) Source (Note 1)   (meta.bib)
  (4+5)MJD d [53310.5/58874.8] Epoch, Modified Julian Date (JD-2400000.5) (time.epoch)

ALL cols		    
(n) indicates a possible blank or NULL column(i)indexed column
  (4)X km [-150232823/153255842] Solar System position, X, of observation in km (Note 2)   (pos.cartesian.x;obs)
  (4)Y km [-152281985/148013402] Solar System position, Y, of observation in km (Note 2)   (pos.cartesian.y;obs)
  (4)Z km [-62689519/62070770] Solar System position, Z, of observation in km (Note 2)   (src.redshift;obs)
  (5)e_RA_ICRS mas [1.6/175] Positional uncertainty in RA (stat.error;pos.eq.ra)
  (5)e_DE_ICRS mas [1.6/141] Positional uncertainty in DE (stat.error;pos.eq.dec)
  (5)q_plx (char) h=high-quality (Table 5), l=low-quality (Table 6) and p=poor-quality (or unmeasurable) for parallaxes that need improvement (Table 7) (meta.code.qual)
  (5)chisq   [9.9/4401] χ2 of fit (stat.fit.chi2)
  (5)dof   [17/133] Degrees of freedom (stat.fit.dof)
  (5)chisq/dof   [0.2/77.2] Reduced χ2 of fit (meta.note)
  (5)NSp   [2/39] Number of Spitzer astrometric epochs (meta.number)
  (5)NW1   [0/29] Number of unWISE W1 astrometric epochs (meta.number)
  (5)NW2   [0/29] Number of unWISE W2 astrometric epochs (meta.number)
  (5)NGDR2   [3/344] Number of Gaia DR2 five-parameter re-registration stars (meta.number)

ALL cols		    
(n) indicates a possible blank or NULL column(i)indexed column
  (5)_RA.icrs deg (i) Right Ascension (ICRS, epoch 2000) computed by CDS (pos.eq.ra)
  (5)_DE.icrs deg (i) Declination (ICRS, epoch 2000) computed by CDS (pos.eq.dec)
  (6+9+10)OName (char) Other name (meta.id)
  (6)AOR  (n) [10374912/67453440] Spitzer Astronomical Observation Request (meta.id;obs)
  (6)Bands (char) List of Spitzer/IRAC bands used ("1"=3.6um or "2"=4.5um) (meta.code;instr.filter)
  (6)Prog   [35/90152] Spitzer program (meta.id;obs)
  (6)IRAC (char) IRAC state (Note 1)   (meta.code)
  (6)PI (char) Spitzer program PI (obs.observer)
  (7)Instr (char) Instrument used (instr.setup)
  (7)Obs "Y:M:D" [2016/2020] Observation date, UT, year (time.epoch;obs)
  (7)SpT (char) Spectral type(s) (src.spType)
  (7)f_SpT (char) Spectral type wavelength regime (Note 1)   (meta.code)
  (8+9+10+12)SpTIR (char) Spectral type, bkg=background (Note 1)   (src.spType)

ALL cols		    
(n) indicates a possible blank or NULL column(i)indexed column
  (8+11)n_SpTIR (char) Reference for SpT (Note 2)   (meta.note)
  (8)plx-lit mas (n) [9.9/62.4] Published parallax (pos.parallax.trig)
  (8)e_plx-lit mas (n) [0.2/19] Uncertainty in plx-lit (stat.error)
  (8)n_plx-lit (char) Reference(s) for plx-lit (Note 3)   (meta.note)
  (8)Dist-JW2 pc (n) [12.4/42.3] Distance estimate based on J+W2 magnitudes (pos.distance)
  (8)Dist-HSpT pc (n) [6.6/40.7] Distance estimate based on H and Spectral type (pos.distance)
  (8)Dist-IRAC pc (n) [8.2/41.3] Distance estimate based on IRAC ch1+ch2 magnitudes (pos.distance)
  (8)Dist-WISE pc (n) [10.3/26.5] Distance estimate based on WISE W1+W2 magnitudes (pos.distance)
  (8)l_Dist (char) Limit flag on Dist (meta.code.error)
  (8)Dist pc (n) [7.5/108] Final distance estimate (pos.distance)
  (8)f_Dist (char) Flag on Dest, bkg=background, ? (meta.code)
  (8)20pc (char) Included in 20pc census? (meta.code)
  (8)Remarks (char) Remarks (Note 4)   (meta.note)

ALL cols		    
(n) indicates a possible blank or NULL column(i)indexed column
  (9)f_FName (char) Cross identification flags for Table A1 (Note 1)   (meta.code)
  (9)r_FName (char) Discovery Reference(s) (see refs.dat file) (meta.ref;pos.frame)
  (9+10)SpTO (char) Optical spectral type (src.spType)
  (9)f_SpTO (char) Flag on SpTO (Note 2)   (meta.code)
  (9)u_plx (char) [:u ] Uncertainty flag (Note 3)   (meta.code.error;pos.parallax)
  (9)pmtot mas/yr (n) [11.7/8151.6] Total proper motion (pos.pm)
  (9)e_pmtot mas/yr (n) [0.1/99.7] Uncertainty in pmtot (stat.error)
  (9)AS-flags (char) Flags on astrometry (Note 4)   (meta.code)
  (9+11+12)Teff K (n) [250/2338] Effective surface temperature (phys.temperature.effective)
  (9+11+12)e_Teff K (n) [10/198] Uncertainty in Teff (stat.error;phys.temperature.effective)
  (10)PBan % (n) [0/99.8] Banyan Σ probability (stat.fit.goodness)
  (10)ABanyan (char) Banyan Σ association (Note 1)   (meta.id.parent)
  (10)Plac % (n) [0/56] LACEwING probability (stat)

ALL cols		    
(n) indicates a possible blank or NULL column(i)indexed column
  (10)ALaceWing (char) LACEwING association (Note 1)   (meta.id.parent)
  (10)lowg (char) Low gravity object? (meta.code)
  (10)Assoc (char) Association member? (meta.code)
  (10)f_Assoc (char) Flag on Association (Note 2)   (meta.code)
  (10)Youth (char) Youth Reference (Note 3)   (meta.bib)
  (10)Mass MJup (n) [10/25] Mass in Jupiter mass units (Note 4)   (phys.mass)
  (10)e_Mass MJup (n) [1/6.2] Uncertainty in Mass (Note 4)   (stat.error;phys.mass)
  (10)B_Mass MJup (n) [12/12] Upper mass bound (Note 4)   (phys.mass;stat.max)
  (10+12)n_Mass (char) Reference for Mass (Note 3)   (meta.note)
  (11)n_plx (char) Reference for plx (Note 3)   (meta.note)
  (11)n_Teff (char) Reference Teff (Note 3)   (meta.note)
  (11)n_Hmag (char) Reference Hmag (Note 3)   (meta.note)
  (12)Mass Mjup [10.0/87.0] Mass, Jupiter units (Note 2)   (meta.unit;phys.mass)

ALL cols		    
(n) indicates a possible blank or NULL column(i)indexed column
  (12)e_Mass Mjup (n) [0.7/6.14] Lower or symmetric error on Mass (Note 2)   (stat.error;phys.mass)
  (12)E_Mass Mjup (n) [1.1/2.9] Upper uncertainty on Mass (Note 2)   (stat.error;stat.max)
  (12)B_Mass Mjup (n) [12.0/12.0] Upper bound on Mass (Note 2)   (phys.mass;stat.max)
  (12)Meth (char) Method (Note 3)   (meta.note)
  (13)Ref (char) Reference code (meta.note)
  (13)Auth (char) First autor's name(s) (meta.id;meta.main)
  (13)BibCode (char) Bibcode of the reference (meta.bib.bibcode)
  (13)Comm (char) Comment (meta.note)

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