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J/ApJ/834/85/table1 Hα emission in nearby M dwarfs (Newton+, 2017)
Magnetic activity measurements and rotation periods for nearby northern M dwarfs (2202 rows)
  recno=576
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ColumnValue  Explain   (UCD)
_RAJ200017 12 07.81800 "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+45 39 58.0010 "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)
_RAB195017 10 40.93224 "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+45 43 28.7593 "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)
_Glon071.33692254 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+35.96581929 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)
576recno 576  Record number assigned by the VizieR team. Should Not be used for identification. (meta.record)

2MASS17120780+4539587  2MASS identifier (HHMMSSss+DDMMSSs; J2000) (meta.id;meta.main)
RAJ200017 12 07.818 "h:m:s" (i) Hour of Right Ascension (J2000) (pos.eq.ra;meta.main)
DEJ2000+45 39 58.001 "d:m:s" (i) Degree of Declination (J2000) (pos.eq.dec;meta.main)
Mass 0.457 Msun [0.05/0.9] Stellar mass (phys.mass)
Rad 0.467 Rsun [0.07/0.9] Stellar radius (phys.size.radius)
chi  10-5 [0.1/8.4] χ parameter times 10-5 (Note 1)   (stat.fit.param)
Per  d [0.1/151] Photometric rotation period (time.period)
r_Per   ADS bibcode for Per (meta.ref;pos.frame)
EWHa  0.1nm [-28/0.5] Hα equivalent width, this work (spect.line.eqWidth)
e_EWHa  0.1nm [0.01/0.7] Error in EWHa (stat.error)
EWHa-r 0.017 0.1nm [-28/1.3] Hα EW adopted in restricted sample (spect.line.eqWidth)
e_EWHa-r 0.026 0.1nm [0/5.121] Error in EWHa-r (stat.error)
r_EWHa-r2002AJ....123.3356G  ADS bibcode for EWHa-r (meta.ref;pos.frame)
logLHa  [10-4] [-0.6/5] log LHα/Lbol x10-4 relative to "quiescent" level (phys.luminosity;em.line.Halpha)
l_EWHa-u0   [0/1] Upper limit flag for EWHa-u; 1=upper limit (meta.code.error)
EWHa-u 0.017 0.1nm [-49.6/1.3] Hα EW adopted in unrestricted sample (spect.line.eqWidth)
e_EWHa-u 0.026 0.1nm [0/5.121] Error in EWHa-u (stat.error)
r_EWHa-u2002AJ....123.3356G  ADS bibcode for EWHa-u (meta.ref;pos.frame)
Act0  Activity flag (0=active, 1=inactive) (meta.code)
Bin1  Binary flag (0=no known close companion, 1=companion) (meta.code)

LSPM 2  Display data within 1.5" from the LSPM-North Catalog (Lepine+ 2005, I/298) (meta.ref.url)
SimbadSimbad  ask the Simbad data-base about this object (meta.ref.url)
  
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