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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=656
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ColumnValue  Explain   (UCD)
_RAJ200019 16 55.25800 "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+05 10 08.1790 "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)
_RAB195019 14 27.13441 "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+05 04 43.2208 "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)
_Glon040.44699600 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 -3.28325540 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)
656recno 656  Record number assigned by the VizieR team. Should Not be used for identification. (meta.record)

2MASS19165526+0510086  2MASS identifier (HHMMSSss+DDMMSSs; J2000) (meta.id;meta.main)
RAJ200019 16 55.258 "h:m:s" (i) Hour of Right Ascension (J2000) (pos.eq.ra;meta.main)
DEJ2000+05 10 08.179 "d:m:s" (i) Degree of Declination (J2000) (pos.eq.dec;meta.main)
Mass 0.481 Msun [0.05/0.9] Stellar mass (phys.mass)
Rad 0.490 Rsun [0.07/0.9] Stellar radius (phys.size.radius)
chi 5.406 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 0.164 0.1nm [-28/1.3] Hα EW adopted in restricted sample (spect.line.eqWidth)
e_EWHa-r  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 0.043 [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 0.164 0.1nm [-49.6/1.3] Hα EW adopted in unrestricted sample (spect.line.eqWidth)
e_EWHa-u  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 1  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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