GCN Circular 17461
Subject
GRB 150211A: ROTSE-III Upper Optical Limit
Date
2015-02-12T22:49:20Z (9 years ago)
From
Farley V. Ferrante at Southern Methodist U/ROTSE <fferrante@smu.edu>
F. V. Ferrante (SMU), T. Guver (Istanbul U), G. Dhungana (SMU), R. Staten (SMU)
and R. Kehoe (SMU) report on behalf of the ROTSE GRB team:
The 0.45-m ROTSE-IIIb telescope, located at McDonald Observatory, Texas,
responded to GRB 150211A (Swift trigger 630714; Starling, et al.,GCN 17434) with
imaging beginning 3.8 s after the GCN notice time. An automated response recorded
the first image at 11:52:43.8 UT, 30.7 s after the burst, under fair observing conditions.
The unfiltered images are calibrated relative to USNO A2.0 (R). We do not detect an
optical source within the refined Swift-XRT error circle (Starling et al., GCN 17442).
We set the following upper limit:
start UT end UT t_exp(s) mlim t_start-tGRB(s) Coadd?
-----------------------------------------------------------------------------------------------
11:52:43.8 11:53:43.8 60 17.6 30.7 N