[vsnet-grb-info 12527] GRB 121024A: PAIRITEL NIR Detection
GCN Circulars
gcncirc at capella2.gsfc.nasa.gov
Thu Oct 25 04:52:53 JST 2012
TITLE: GCN CIRCULAR
NUMBER: 13893
SUBJECT: GRB 121024A: PAIRITEL NIR Detection
DATE: 12/10/24 19:52:45 GMT
FROM: Adam Morgan at U.C. Berkeley <qmorgan at gmail.com>
A. N. Morgan, and J. S. Bloom (UC Berkeley) report:
We observed the field of GRB 121024A (Pagani et al., GCN 13886) with
the 1.3m PAIRITEL located at Mt. Hopkins, Arizona. Observations began
at 2012-Oct-24 07h31m47s UT, ~4.6 hours after the Swift Trigger. In
mosaics (effective exposure time of 0.46 hours) taken simultaneously
in the J, H, and K filters, we detect a source at the optical
afterglow location (Pagani et al., GCN 13886; Klotz et al., GCN 13887;
Jelinek et al., GCN 13888; LaCluyze et al., GCN 13889; Knust et al.
GCN 13891).
The preliminary photometry yields:
post burst
t_mid (hr) exp.(hr) filt mag m_err
6.06 0.46 J >18.4 3sig
6.06 0.46 H 17.1 0.2
6.06 0.46 Ks >16.2 3sig
All magnitudes are given in the Vega system, calibrated to 2MASS. No
correction for Galactic extinction has been made to the above reported
values.
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