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[vsnet-chat 1345] Graham E-region standards
- Date: Mon, 28 Sep 1998 20:29:17 -0700
- To: Jean-Claude.Mermilliod@obs.unige.ch, aavso-discussion@physics.mcmaster.ca, barnes@lowell, borde@dasgal1.obspm.fr, buie@lowell, buscombe@nwu.edu, csande@csc.com, dubois@simbad.u-strasbg.fr, francois@simbad.u-strasbg.fr, gerard@simbad.u-strasbg.fr, morel@ozemail.com.au, seu@pyxis.usno.navy.mil, vsnet-chat@kusastro.kyoto-u.ac.jp, wayne.h.warren.1@gsfc.nasa.gov
- From: bas@lowell.Lowell.Edu (Brian Skiff)
- Subject: [vsnet-chat 1345] Graham E-region standards
- Sender: owner-vsnet-chat@kusastro.kyoto-u.ac.jp
Star-catalogue folks,
I realized in the last few days that Graham's E-region standard stars
(1982PASP...94..244G) ware not available in machine-readable form from the
data centers. I have compiled the data for the 102 stars, a sample of which is
is shown below, and give in addition accurate coordinates for the stars. The
coordinates are not simply those of Graham precessed to equinox 2000, but
obtained mostly from the GSC and USNO-A1.0 if they are not in some astrometric
catalogue. Graham's positions turn out to have numerous errors and well as
being inaccurate because of the use of the Harvard Annals x,y coordinates in
their derivation.
Because they are very useful for analyzing and weighting photometric
reductions, I have included the internal errors (mean errors of the mean) and
number of observations made by Graham. Thus each line is about 113 columns
wide. The complete file (just 12Kb) is copied out to the Lowell ftp area at:
http://ftp.lowell.edu/pub/bas/starcats/graham.stds
\Brian
Name RA (2000) Dec V U-B B-V V-R R-I sigV sigUB sigBV sigVR sigRI n
[CS62] E1 41 1 24 41.9 -44 31 42 6.270 1.084 1.146 0.577 0.517 0.003 0.006 0.002 0.001 0.004 5
[CS62] E1 35 1 22 02.2 -44 25 30 9.471 1.679 1.427 0.777 0.722 0.007 0.008 0.005 0.005 0.005 6
[CS62] E1 20 1 23 16.4 -44 40 18 9.855 0.275 0.736 0.402 0.387 0.008 0.009 0.008 0.004 0.005 5
[CS62] E1 44 1 24 12.3 -44 27 01 10.885 0.146 0.620 0.359 0.334 0.013 0.014 0.012 0.005 0.014 4
[CS62] E1 49 1 24 57.6 -44 38 27 11.640 0.019 0.564 0.332 0.327 0.017 0.009 0.013 0.010 0.014 4
[CS62] E1 a 1 25 19.5 -44 27 02 12.666 0.020 0.615 0.341 0.335 0.010 0.012 0.007 0.005 0.005 4
[CS62] E1 h 1 24 40.0 -44 33 55 13.828 0.235 0.722 0.375 0.373 0.010 0.010 0.011 0.011 0.014 4
[CS62] E1 i 1 24 48.1 -44 38 31 13.759 0.614 0.916 0.514 0.446 0.008 0.017 0.005 0.007 0.013 4
[CS62] E1 p 1 24 04.6 -44 23 42 14.778 0.383 0.799 0.475 0.461 0.009 0.017 0.006 0.006 0.012 4
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