GCN Circular 10324
Subject
GRB 100111A: PAIRITEL NIR Upper Limits
Date
2010-01-11T22:35:56Z (14 years ago)
From
Adam Morgan at U.C. Berkeley <qmorgan@gmail.com>
A. N. Morgan, S. B. Cenko, J. S. Bloom, (UC Berkeley), report:
We observed the field of GRB 100111A (Vetere et al., GCN 10317) with
the 1.3m PAIRITEL located at Mt. Hopkins, Arizona. Observations began
at 2010-01-11 12:20:11 UT, ~8.12 hours after the Swift trigger.
Observations were taken under good weather conditions but at high
airmass before dawn. In mosaics (effective exposure time of ~2223
seconds) taken simultaneously in the J, H, and Ks filters, we do not
detect the optical afterglow (Vetere et al., GCN 10317; Xu et al., GCN
10318; Hoversten et al., GCN 10323).
The preliminary photometry yields:
post_burst
t_mid(h) exp(s) filt U. Limit (3 sig)
8.60 2223 J > 19.0
8.60 2223 H > 18.5
8.60 2223 Ks > 18.0
All magnitudes given in the Vega system, calibrated to 2MASS. No
correction for Galactic extinction has been made to the above reported
values.