GCN Circular 13655
Subject
GRB 120816A: ROTSE-III Optical Limits
Date
2012-08-16T20:18:36Z (12 years ago)
From
Weikang Zheng at U.of Michigan <zwk@umich.edu>
W. Zheng (U Mich), W. Rujopakarn (Steward), T. Guver (Sabanci
University), report on behalf of the ROTSE collaboration:
ROTSE-IIId, located at the Turkish National Observatory at Bakirlitepe,
Turkey, automatically responded to GRB 120816A (Swift trigger 531223;
Page et al., GCN 13654). An automated response took the first image at
19:23:18.6 UT, 285 s after the burst, under fair conditions. We took 10
5-sec, 10 20-sec and 50 60-sec exposures. These unfiltered images are
calibrated relative to USNO A2.0 (R). Imaging is on going.
Comparison to the DSS (second epoch) reveals no new sources within the
3-sigma Swift/BAT error circle or the XRT error circle; however, we are
limited as the field is severely crowded. Individual images have
limiting magnitudes ranging from 13.9-15.1; we set the following
specific limits.
start UT end UT t_exp(s) mlim Coadd?
----------------------------------------------------
19:23:18.6 19:23:23.6 5 13.9 N
19:23:45.6 19:23:50.6 5 14.2 N
19:24:13.1 19:24:18.1 5 14.3 N
19:25:34.5 19:25:54.5 20 14.8 N
19:35:05.4 19:40:22.7 600 15.1 Y