[vsnet-grb-info 9102] GRB 100413A: Faulkes Telescope South observations

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  10589
SUBJECT: GRB 100413A: Faulkes Telescope South observations
DATE:    10/04/14 12:39:48 GMT
FROM:    Cristiano Guidorzi at Ferrara U,Italy  <guidorzi at fe.infn.it>

C. Guidorzi (U. Ferrara), R.J. Smith (Liverpool JMU),
N. Tanvir (U. Leicester), I.A. Steele, S. Kobayashi,
C.G. Mundell, D. Bersier, Z. Cano, N.R. Clay, A. Melandri,
C.J. Mottram (Liverpool JMU), A. Gomboc (U. Ljubljana)
report on behalf of a large collaboration:

On 2010 April 13 at 17:37:19 UT the 2-m Faulkes Telescope South
automatically began observing the Swift GRB 100413A
(Holland et al., GCN Circ. 10581) using the BVR, i' filters,
corresponding to 231 s after the burst trigger time.

Inside the XRT error circle (Goad et al. GCN Circ. 10584)
we do not detect any source at the following limiting
magnitudes:

Mid time from    Total Exp   Filter    Magnitude
trigger (min)    (s)
------------------------------------------------
04.52            3x10        R         > 19.8
28.6              540        R         > 22.2
33.2              520        i         > 21.3
------------------------------------------------

Magnitudes have been calibrated from nearby USNOB-1
stars, using the R2 and I magnitudes.