GCN Circular 16120
Subject
GRB 140419A: ROTSE-III Detection of Optical Counterpart
Event
Date
2014-04-19T04:40:43Z (12 years ago)
From
Tolga Guver at UA <tolga@physics.arizona.edu>
GRB 140419A: ROTSE-III Detection of Optical Counterpart
T. Guver (Istanbul Univ.), F. V. Ferrante (SMU), H. Flewelling
(IfA/Hawaii), R. Kehoe (SMU), G. Dhungana (SMU) report on behalf of
the ROTSE collaboration:
ROTSE-IIIb, located at McDonald Observatory, Texas, responded to GRB
140419A (Swift trigger 596426, GCN 16118). The first image was at
04:07:18.7 UT, 27.3 s after the burst (8.7 s after the GCN notice
time). The unfiltered images are calibrated relative to USNO A2.0. We
detect a new object, not visible in the DSS (second epoch), with
coordinates:
08:27:57.7 +46:14:25.9 (J2000), with positional uncertainty of 1' or better
start UT mag mlim(of image)
----------------------------------
04:07:18.7 13.5 15.0
The object first detected with a magnitude of ~13.5, brightened to
12.5 magnitudes in ~70 seconds then the brightness decayed fast to
~14.3 magnitudes at about 350 seconds.
A jpeg image is available at
http://www.rotse.net/images/gsq596426_3b01_img.jpg Note that the
object marked 8 is the candidate in question.
Continuing observations are in progress.
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