Comparison of star list magnitudes of Droege S31T0493.669 image
Herb Johnson March 9 1997

Image is V band. GSC catalog stars from E plates of Paliomar Sky
Survey plates. SAO is ??

SAO
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SAO catalog for RA 117.4 to 117.999, dec 0.X to -2.4999

Richmond .AST stars for same area, by Richmond number and .AST magnitude
  (Radius R of 3.5 pixels).
Gutzwiller stars for same area, by magnitude
Gombert stars for same area, found via Richmond .AST and .PHT lists only,
   by Gombert number and magnitude

  SAO    RA      dec    mag   Richmond  Gutzwiller Gombert (via Richmond)
135145 117.4584 -2.0664 8.5  30  8.343      7.992   59  8.4326
135150 117.4934 -1.4697 9.0  46  9.608      9.232   90  9.6976
135154 117.5285 -1.6822 8.0
135157 117.5583 -1.4593 8.2  76  8.062      7.725  146  8.1444
135161 117.6426 -1.6099 8.5 107  8.075      7.698  226  8.1587
135171 117.7191 -2.4953 8.3 142  8.329             267  8.5695
116019 117.7222  0.0792 6.6
135175 117.8137 -0.4750 9.0                 8.850
135176 117.8221 -0.4620 9.1                 8.896
116031 117.8242 -0.1050 9.0 195  9.213      8.850  350  9.3497
135178 117.8348 -2.0626 8.6 199  8.256      7.906  366  8.3489
116040 117.8938  0.3830 8.7 222  8.215      7.878  400  8.3967

GSC
---

GSC stars RA 117.4 to 117.999, decl -0.0 to -2.4999

Richmond .AST stars for same area, by Richmond number and .AST magnitude
  (Radius R of 3.5 pixels).
Gutzwiller stars for same area, by magnitude
Gombert stars for same area, found via Richmond .AST and .PHT lists only,
   by Gombert number and magnitude

        GSC     RA          dec      mag    Richmond  Gutzwiller Gombert (via Richmond)
GSC0483201258  117.5306   -0.3429    10.74  62 10.304   9.947   109 10.3989
GSC0483601452  117.5929   -2.2431    10.77  90 10.571  10.171   162 10.7619
GSC0483200773  117.6202   -1.3077    11.62 100 11.681  11.316   175 11.7486
GSC0483600053  117.6446   -2.0127    11.23 108 11.245  10.930   203 11.2856
GSC0483200475  117.6488   -1.6444     9.37 110  9.426   9.066   227  9.0574
GSC0483200400  117.6892   -0.0030    11.69 125 10.982  10.624   234 11.1109
GSC0483201504  117.7124   -0.9779    10.95 140 10.638  10.302   263 10.7166
GSC0483200700  117.7204   -0.6528    10.76 145  9.995   9.645   269 10.1181
GSC0483200544  117.9566   -0.6752    11.94 256 11.519  11.213   448 11.6452
GSC0483201812  117.9848   -0.3181    11.98             11.223
GSC0483600017  117.9922   -2.0378    10.00 268 10.362  10.012   476 10.4492

Other stats:
-----------
Richmond's list: 1400 stars (to #268 identified on GSC; #222 id'ed on SAO)
Gutzwiller's list: 2182 stars (to #388 identified on GSC; #322 id'ed on SAO)
Gombert's list: 2207 stars (to #476 identified on GSC; #400 id'ed on SAO)
No overlap for the 12 SAO and 11 GSC stars in this range of .6 degree RA
  and 2.5 degrees in dec (1.5 degrees square).

Methods
-------

All files sorted by RA.
Catlog file (SAO, GSC) edited for stars of RA 117.X, stars out of dec
   range removed from list.
Richmond .AST file manually searched for matching RA and dec to about +/- .02.
Gutzwiller file manually searched for matching RA and dec to about +/- .02.
   (In most cases, the most adjacent stars are off by much more than this.)
Matching stars in Richmond .AST list found in Richmond .PHT list by
  Richmond number; pixel address converted to Gombert pixel coordinates;
  (add 1 to Richmond row address; add 15 to Richmond column address)
  corresponding Gombert star found.