[vsnet-chat 1902] More stars

[bas@lowell.Lowell.Edu (Brian Skiff)]

     Following Arne Henden's announcement of some new photometric sequences,
I have added a selection of stars from each of these fields to my photometric
reference file.  In addition, the file now includes BVR photometry for several
hundred very faint stars from a paper by Croom et al. (MNRAS accepted) that lie
along the -30 Dec zone.
     In most cases I tweezed the original star-lists as follows.  For Arne's
lists the errors are given explicitly, so I ruthlessly deleted all stars with
errors larger than 0.030 mag. in both V and B-V.  For well-populated fields,
I then selected about five stars per magnitude interval in roughly 0.2 mag
increments.  The remainder were compared against USNO-A2.0 using the Strasbourg
VizieR, which allowed me to delete additional stars that have close companions
(usually < 15" away and less than 4 or 5 magnitudes fainter than the sequence
star).  For the V893 Sco field I adopted directly the selection made by Bruce
Sumner.  For GM Sgr, a region where A2.0 fails utterly (and understandably),
I simply checked against the GSC and hope for the best.  In the GO Com field,
I have kept the V-R colors from Misselt, which now make sense with Arne's
better V and B-V.
     A similar procedure was applied to the deep Croom et al. sequences,
although that list occasionaly extends fainter than A2.0, and galaxies needed
to be omitted using an index the authors provide.
     GSC names are given as available in all cases.
     The files are at:

http://ftp.lowell.edu/pub/bas/starcats/loneos.phot        (1.9Mb uncompressed)
http://ftp.lowell.edu/pub/bas/starcats/loneos.phot.gz     (520Kb compressed)

A small bibliographic reference file is at:

http://ftp.lowell.edu/pub/bas/starcats/loneos.ref         (77Kb)

A date given at the top of each file shows when the file was last amended.

\Brian

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