[vsnet-alert 1750] GRB 980425 sequence

[bas@lowell.Lowell.Edu (Brian Skiff)]

     IAUC 6895 contains interesting news about an eruptive object possibly
associated with the recent gamma-ray burst GRB 980425.  The new object appears
in a spiral arm of the small galaxy ESO 184-G82.  A finder chart containing
a VRI photometric sequence has ben provided by Olivier Hainaut and colleagues
at ESO at the following URL:

http://sc6.sc.eso.org:80/~ohainaut/SN

Using their chart and data I have obtained positions from USNO-A1.0 for the
galaxy and comparison stars and show the data below.  If we assume the V-R
colors are correct, a couple of the V-I colors (marked with ?) are either
somewhat in error or cannot apply to ordinary G/K dwarf field stars.
     The new object is presently about mag. 15 and has brightened considerably
in recent days.  It is not visible on the digitized sky survey image of the
field.  Apparently the spectrum is not that of a supernova and remains
indecipherable for the moment.


Name                RA  (2000)  Dec       V    V-R   V-I
ESO 184-G82      19 35 04.0  -52 50 36
suspect          19 35 03.2  -52 50 46

ESO 184-G82 1    19 35 01.9  -52 50 22  18.51  0.29  0.61
ESO 184-G82 2    19 34 59.2  -52 50 13  17.66  0.70  1.25?
ESO 184-G82 3    19 34 57.8  -52 50 18  17.98  0.37  0.90
ESO 184-G82 4    19 34 59.2  -52 51 02  17.82  0.41  0.77
ESO 184-G82 5    19 35 09.3  -52 50 38  19.39  0.35  1.07?
ESO 184-G82 6    19 35 06.5  -52 49 54  17.24  0.39  0.72
ESO 184-G82 7    19 35 07.9  -52 49 22  17.51  0.53  1.00
ESO 184-G82 8    19 35 03.5  -52 51 45  18.61  0.42  0.81
ESO 184-G82 9    19 34 57.2  -52 52 46  17.96  0.48  0.92
ESO 184-G82 10   19 35 11.6  -52 50 44  17.53  0.48  0.89


\Brian

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