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GCN Circular 3100

GRB 050315: Optical afterglow identification
2005-03-16T09:41:52Z (19 years ago)
Edo Berger at Carnegie Obs <>
Dan Kelson and Edo Berger (Carnegie Observatories) report:

"On 2005, March 16.347 UT we imaged the XRT error circle of GRB 050315
(GCN 3097) with the newly-comissioned LDSS3 instrument on Magellan/Clay in
the r-band filter.  Within the 6" radius error circle we find a single
bright object which is not present in the DSS at coordinates (J2000):

        RA  =  20:25:54.1
        DEC = -42:36:02.2

with an uncertainty of about 0.5" in each coordinate.  We consider this
object to be the optical afterglow of GRB 050315."
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