[vsnet-grb-info 13720] GRB 130725A - Faulkes Telescope South Observations

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  15035
SUBJECT: GRB 130725A - Faulkes Telescope South Observations
DATE:    13/07/26 08:43:47 GMT
FROM:    Andrea Melandri at Liverpool John Moores U  <axm at astro.livjm.ac.uk>

F.J. Virgili (LJMU), C. Guidorzi (U. Ferrara),  J. Japelj, D. Kopac  
(U. Ljubljana), A. Melandri (INAF-OAB) report:

"The 2-m Faulkes Telescope South robotically followed up GRB 130725A  
(SWIFT trigger 563980; Zhang et al. GCN 15028) beginning 111.9 min  
after the GRB trigger time. No optical counterpart is detected within  
the XRT error circle to the following conservative limits:

Midtime from GRB    Exposure    Filter    Magnitude
      (min)                        (s)
-------------------------------------------------------------------------
      112.2                  3x10s           r'         > 18.9
      117.1                  1x10s           i'         > 17
-------------------------------------------------------------------------

Values are calibrated against nearby SDSS field stars.