[vsnet-sequence 175] BVRI sequence for S5 1803+78

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

     In the July 2002 issue of the AJ, Nesci et al. provide a BVRI photometric
sequence for the variable BL Lac galaxy S5 1803+78 = IRAS 18036+7827
(18 00 45.68 +78 28 04.0 [2000]).  Below I show USNO-A2.0 coordinates for the
stars along with V and BVRI colors (Nesci et al. show separate magnitudes).
The internal consistency of the colors is good, and suggests the photometry
is reliable at the few-percent level.

\Brian

---------------------------

source: 2002AJ....124...53N

Name              RA   (2000)   Dec        GSC       V    B-V   V-R   V-I
S5 1803+78 A   18 01 37.43 +78 26 58.4  4574-0480  14.54  0.85  0.48  0.92
S5 1803+78 B   18 01 38.22 +78 29 27.9  4574-0834  15.30  0.67  0.38  0.77
S5 1803+78 C   18 00 33.90 +78 28 33.9             15.73  0.64  0.37  0.76
S5 1803+78 D   18 00 28.61 +78 28 08.1             16.58        0.50  1.01
S5 1803+78 E   18 00 23.66 +78 29 50.0             16.49        0.39  0.79

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