GCN Circular 10692
Subject
GRB 100424A: NIR Afterglow Confirmation
Date
2010-04-27T00:05:44Z (14 years ago)
From
S. Bradley Cenko at Caltech <cenko@srl.caltech.edu>
S. B. Cenko, J. S. Bloom, D. A. Perley, A. N. Morgan, B. E. Cobb (UC
Berkeley) and A. J. Levan (U. Warwick) report on behalf of a larger
collaboration:
We have obtained a second epoch of K-band imaging of the field of GRB
100424A (Hoversten et al., GCN 10667) with the Near InfraRed Imager and
Spectrometer mounted on the 8 m Gemini North telescope. Observations
began at 11:23 UT on 26 April 2010 (~ 43 hours after the burst).
The previously identified candidate in the XRT error circle (Cenko et al.,
GCN 10682) has faded by 0.9 +/- 0.1 mag, confirming the object is indeed
the NIR afterglow of GRB 100424A. Assuming negligible contribution from
an underlying host galaxy, the inferred power-law decay index, alpha ~
0.7, is relatively shallow.
We wish to thank the staff at Gemini Observatory, in particular Kristin
Chiboucas, for executing these observations.