VizieR

CfA VizieR . ADAC VizieR . Cambridge (UK) VizieR . IUCAA VizieR . INASAN VizieR .

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/AN/341/827
  Magnitude accuracies in pre-telescopic catalogs (Protte+, 2020)
ReadMe+ftp
2020AN....341..827P
Similar Catalogs
Post annotation 		img(gal)
1.J/AN/341/827/ptolemyConversion and correction data for Ptolemy magnitude (992 rows)

Simple ConstraintList Of Constraints
 
Query by Constraints constraints help applied on Columns (Output Order: + - )
ShowSortColumn  Constraint Explain   (UCD)
  recno  Record number assigned by the VizieR team. Should Not be used for identification. (meta.record)
  HIP  Number of Star in Hipparcos catalog (Cat. I/239) (meta.id;meta.main)
  NoP  Number of Star in the Almagest (c.f. Verbunt & van Gent, 2012, Cat. J/A+A/544/A31) (meta.id)
  mHIP mag Modern Johnson V-magnitude taken from Hipparcos catalog (Cat. I/239) (phot.mag;em.opt.V)
  Culm deg Culmination height above horizon for Alexandria at 137 C.E. (meta.note)
  B-V mag (n) Colour-index taken from Hipparcos catalogue (Cat. I/239) (phot.color;em.opt.B;em.opt.V)
  Back mag/sr (n) Background brightness (as defined in th paper) (instr.background)
  InMW?  (n) [0/1] Is the star within ±10° of the galactic equator (1=yes/0=no) (meta.code)
  mP mag [1-6] Numerical magnitude given by Ptolemy (phot.mag;em.opt)
  qual (char) [b/f] qualifier, added by Ptolemy: b(righter)/f(ainter) (meta.code.qual)
  mOld mag Ptolemian magnitude with qualifier converted to ±0.5mag (phot.mag;em.opt)

ALL cols		    
(n) indicates a possible blank or NULL column(i)indexed column
  m mag Ptolemian magnitude converted to the modern scale by a linear transformation, m=(mOld-0.92)/0.75 (phot.mag;em.opt)
  d(B-V) mag (n) Corrective term for the colour-dependency linear model (only for stars FAINTER than 2.3 mag): d(B-V)=0.11*(B-V)-0.06mag (arith.factor)
  d(Ext) mag Corrective term for the extinction-effect non-linear model (Note G1)   (arith.factor)
  d(beta) mag Corrective term for the background-dependency linear model: d(beta)=-0.37*Back-0.69mag (arith.factor)
  m* mag Final converted magnitude including all corrective terms, m*=m-d(B-V)-d(Ext)-d(beta) (phot.mag;em.opt)
  dm mag Magnitude error dm=m-mHIP (stat.error;phot.mag)
  dm* mag Corrected magnitude error dm*=m*-mHIP (stat.error)
  Simbad  ask the Simbad data-base about this object (meta.ref.url)
  _RA deg (i) Right Ascension (J2000) from SIMBAD (not part of the original data) (pos.eq.ra;meta.main)
  _DE deg (i) Declination (J2000) from SIMBAD (not part of the original data) (pos.eq.dec;meta.main)

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