GCN Circular 13893
Subject
GRB 121024A: PAIRITEL NIR Detection
Date
2012-10-24T19:52:45Z (12 years ago)
From
Adam Morgan at U.C. Berkeley <qmorgan@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.