[vsnet-grb-info 12860] GRB 130215: ROTSE-III Detection of Optical Counterpart

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  14205
SUBJECT: GRB 130215: ROTSE-III Detection of Optical Counterpart
DATE:    13/02/15 01:54:24 GMT
FROM:    Heather Flewelling at IfA/Hawaii  <flewelling.heather at gmail.com>

W. Zheng (UC Berkeley), H. Flewelling (IfA/Hawaii), report on behalf of the
ROTSE collaboration:

ROTSE-IIIb, located at McDonald Observatory, Texas, responded to GRB 130215
(Swift trigger 548760). The first image was at 01:43:07.3 UT, 697.1 s after
the burst (8.3 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:

     02:54:00.7      +13:23:43.7    (J2000), with positional uncertainty of
1" or better

start UT    	mag     mlim(of image)
----------------------------------
01:43:07.3     14.2     16.2


A jpeg image is available at
http://www.rotse.net/images/gsb548760_3b00_img.jpg Note that the object
marked 8 is the candidate in question.

Continuing observations are in progress.