[vsnet-chat 4439] Comp stars near NGC 2608

[Brian Skiff <bas@lowell.edu>]

     Here are some photometric reference stars in the field of NGC 2608.
Comparing these with GSC shows that the GSC is systematically close to V in
this area (+/- 0.1 mag. or so), and that USNO-A2.0 'mr' magnitudes are also
fairly close to standard R.  USNO-A2.0 'mb' are too bright by several tenths.
(As usual, these comments do not apply to USNO-A1.0.)  Be sure to use several
such stars to make your magnitude zero-point adjustment.
     The two stars with asterisks by their V magnitudes were observed on
several nights by Landolt, and constitute secondary BVRI standards.

\Brian


Name            RA   (2000)   Dec       GSC       V     B-V    V-R    V-I
P311-C        8 32 01.1   +29 37 16  1947-0501  10.70   0.57
SA 52-B       8 31 50.4   +29 37 59  1947-0529  10.93   1.04
[AKS95] 392   8 35 08.3   +28 23 51  1948-1672  11.48   0.49
[AKS95] 394   8 35 32.7   +28 42 23  1948-1634  11.53   0.45
P311-D        8 30 30.0   +29 28 28  1947-0133  11.66   0.41
[AKS95] 397   8 36 12.2   +28 41 29  1948-1582  12.04   0.96
SA 52-193     8 30 46.8   +29 20 31  1947-0619 *12.41   0.45   0.27   0.58
[AKS95] 396   8 36 12.0   +28 39 05  1948-1521  12.61   0.69
SA 52-56      8 30 51.1   +29 14 02  1947-0150 *13.19   0.64   0.38   0.78
P311-G        8 30 30.5   +29 16 08  1947-1367  13.54   0.62
SA 52-C       8 31 47.2   +29 39 52  1947-0736  13.81   0.41
P311-H        8 30 41.0   +29 21 32  1947-0641  13.94   0.57               
P311-I        8 30 42.0   +29 17 47             14.44   0.72
SA 52-E       8 31 37.2   +29 39 04             15.31   0.48
SA 52-D       8 31 43.8   +29 39 53             15.95   0.61

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