[vsnet-chart 198] BV sequence near Cas A

[Brian Skiff <bas@lowell.lowell.edu>]

     Below is some BV photometry in the immediate vicinity of the x-ray source
suggested as a possible counterpart for Cas A.  These should be faint enough
to use as calibration with almost any telescope.  The data are extracted from
van den Bergh's 1971 paper (1971 ApJ 165,259), and include all the reasonably
isolated and reliably-measured stars he observed.

\Brian


Name                  RA  (2000)  Dec    s     GSC       V    B-V
Cas A B            23 23 10.5  +58 48 45 G  4011-1174  11.50  0.64
Cas A a            23 23 15.9  +58 48 55 A             14.08  1.82
Cas A e            23 23 32.2  +58 48 44 A             14.60  1.06
Cas A g            23 23 37.9  +58 48 31 A             14.73  1.13
Cas A h            23 23 36.2  +58 49 02 A             14.99  0.90
Cas A l            23 23 31.3  +58 46 38 A             15.33  1.66
Cas A j            23 23 08.4  +58 48 31 A             15.74  0.99

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