[vsnet-grb-info 5981] GRB 080413A: Liverpool Telescope and Faulkes Telescope South optical observations

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  7625
SUBJECT: GRB 080413A: Liverpool Telescope and Faulkes Telescope South optical observations
DATE:    08/04/16 17:23:09 GMT
FROM:    Andreja Gomboc at LT,ARI,Liverpool JMU  <ag at astro.livjm.ac.uk>

A. Gomboc (Ljubljana), C. Guidorzi (U. Bicocca/INAF-OAB), A. Melandri, I.A.
Steele, C.G. Mundell, D.F. Bersier, M.F. Bode, M.J. Burgdorf, S.N. Fraser,
S. Kobayashi, C.J. Mottram, R.J. Smith (Liverpool JMU), P. O'Brien, N.
Bannister, N. Tanvir (U. Leicester) report on behalf of larger GRB 
collaboration:

The Liverpool Telescope observed the field of GRB 080413A (trigger=309096,
Beardmore et al. GCN 7594) under poor weather conditions starting 2-hr after
the trigger. Observations continued with the Faulkes Telescope South.

In our coadded frames we do not detect any source at the position of the
optical afterglow (Beardmore et al. GCN 7594, Rykoff & Rujopakarn GCN 
7593) down to the limiting magnitudes reported below.


Telescope     Filter  Tstart(hr)  Tstop(hr)    Exposure(s)    M_lim
----------------------------------------------------------------------
Liverpool        R      2.0          2.5          760         15.7
Faulkes South    R     12.2         12.2           30         19.2
                  I     12.2         13.1         2080         21.7
----------------------------------------------------------------------

Magnitudes were calibrated with respect to USNOB1 R2 and I.