Some notes on the JSDC V2 released to ESO on april 2014 - V2014-04-23

Files and additional stuff:

Main changes:

  • new color relations fitted on 195 stars (SNR>20, residuals < 5 sigma)
  • refined filtering:
    • -0.5 < Av < 3
    • chi2 < 25 for av/dist, distance modulus & diameters
  • modified e_LDD: diameter error corrected by LDD_chi2: Error on limb-darkened diameter (= weighted mean diameter error x SQRT(chi2) if chi2 > 1)
  • removed useless LDD_quality column (former max_residuals on diameters)
  • filtering uses all simbad otypes

Numbers

  • input : 95482 stars from HIP2
  • output : 74470 stars

Filtering stage

time step desc #columns #rows
2014-04-22T19-08-23 Step 0 (catalog.vot -> catalog0.fits) Convert raw VOTable catalog to FITS ... 183 95482
2014-04-22T19-08-37 Step 1 (catalog0.fits -> catalog1.fits) Keep stars with diamFlag==1 ... 183 87728
2014-04-22T19-08-41 Step 2 (catalog1.fits -> catalog2.fits) Rejecting stars with SB9 references ... 183 86259
2014-04-22T19-08-45 Step 3 (catalog2.fits -> catalog3.fits) Rejecting stars with WDS references ... 183 79501
2014-04-22T19-08-48 Step 4 (catalog3.fits -> catalog4.fits) Rejecting stars with MultFlag=S ... 183 79178
2014-04-22T19-08-52 Step 5 (catalog4.fits -> catalog5.fits) Rejecting badcal stars ... 183 79112
2014-04-22T19-08-57 Step 6 (catalog5.fits -> catalog6.fits) Rejecting stars with bad simbad otypes ... 183 74470
2014-04-22T19-09-42 Step 7 (catalog6.fits -> catalog7.fits) Adding the 'Name' column to use one simbad script ... 184 74470
2014-04-22T19-09-46 Step 8 (catalog7.fits -> catalog8.fits) Flagging duplicated Name entries ... 184 74470
2014-04-22T19-09-48 Step 9 (catalog8.fits -> catalog9.fits) Renaming column from 184 74470
2014-04-22T19-09-52 Step 10 (catalog9.fits -> catalog10.fits) Keeping final columns set 62 74470
2014-04-22T19-09-54 Step 11 (catalog10.fits -> catalog11.fits) Clean useless params of catalog ... 62 74470

Comparison vs JSDC V1:

Comparison vs Bright star catalog

  • BSC contains 9110 rows (a small fraction describes multiple systems)
  • 9016 entries are included in HIP2, +250 of them have not been retained in the original list for JSDC V2 because of error on the plx
  • 8727 (96%) BSC stars have been processed when constructing the JSDC but only 4836 (53%) get a robust diameter
    • 1237 haven't good enough information to compute a robust diameter
    • 1564 have been rejected for multiplicity
    • 1047 have been rejected for bad object types
    • others are rejected by badcal

Comparison vs Borde Merand TODO

Improvment space

  • ~15 stars remain in this catalog which are probably binaries because included in TDS with a separation measure < 5 arc

-- GuillaumeMella - 24 Apr 2014

Topic revision: r1 - 2014-04-24 - GuillaumeMella
 
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