GCN Circular 5858
Subject
GRB 061126: Early Detection of the IR Afterglow
Date
2006-11-26T11:44:30Z (18 years ago)
From
Josh Bloom at UC Berkeley <jbloom@astron.berkeley.edu>
GRB 061126: Early Detection of the IR Afterglow
J. S. Bloom (UC Berkeley), on behalf of a larger collaboration, reports:
"We began observing the field of GRB 061126 (GCN 5854) with the
Peters Automated Infrared Imaging Telescope (PAIRITEL) starting at
2006-11-26 08:48:54.3 UTC, after an automated trigger. This is 58
seconds after the GRB trigger and 42 seconds after the BAT Position
Notice was issued. In individual 7.8 sec exposures, we detect a
transient source simultaneously in JHKs at position of (J2000):
RA 05:46:24.475
DEC +64:12:38.46
(+- 250 mas), consistent with the position of the X-ray transient
(GCN 5855) and optical transient (GCN 5866). In a stack of 39
exposures ending at 08:57:11.3 UTC, we find the preliminary
magnitudes of the afterglow of:
J = 14.12 +/- 0.03
H = 13.26 +/- 0.03
Ks = 12.65 +- 0.06
Imaging has continued since the trigger."
A false-color composite image of the field may be found at:
http://lyra.berkeley.edu/~jbloom/grb061126.ps.gz
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