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GCN Circular 15740

GRB 140114A: ROTSE-III Optical Limits
2014-01-15T01:07:06Z (10 years ago)
Farley V. Ferrante at Southern Methodist U/ROTSE <>
T. Guver (Istanbul Univ.), F. V. Ferrante (SMU), R. Kehoe (SMU), G. Dhungana
(SMU), and W. Zheng (UC Berkely) report on behalf of the ROTSE GRB team:

ROTSE-IIIb, located at McDonald Observatory, Texas, responded to GRB
140114A (Swift trigger 583861; Troja et al, GCN 14728), producing images
beginning 22.4 s after the GCN notice time. An automated response took the
first image at 11:59:20.4 UT, 98.1 s after the burst, under fair conditions.
We took 10 5-sec, 10 20-sec and 9 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; the field is not crowded.
Individual images have limiting magnitudes ranging from 14.0-15.1; we set
the following specific limits.

start UT       end UT      t_exp(s)   mlim   t_start-t_GRB(s)  Coadd?
11:59:20.4   11:59:25.4         5      14.0           98.1            N
11:59:20.4   11:60:20.4        60     15.0           98.1            N
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