GCN Circular 5424
Subject
GRB 060807: afterglow confirmation
Date
2006-08-08T10:46:49Z (18 years ago)
From
Daniele Malesani at SISSA-ISAS,Trieste,Italy <malesani@sissa.it>
D. Malesani (SISSA), J. Fynbo (DARK/NBI), S. Piranomonte (INAF/OAR), &
A. Djupvik (NOT), report:
We have performed relative photometry between the NOT (Fynbo et al., GCN
5420) and VLT (Malesani et al., GCN 5422) R-band images of GRB 060807
(De Pasquale et al., GCN 5409).
We find that the object indicated by Fynbo et al. (GCN 5420) dimmed by
0.61 +- 0.06 mag between 6.69 and 8.93 hr after the GRB. This confirms
that the object was indeed the optical afterglow of GRB 060807. Assuming
a power-law time dependence F(t) propto t^-alpha, the inferred decay
index is quite steep: alpha = 1.9 +- 0.2.
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