GCN Circular 10017
Subject
GRB 091010: Faulkes Telescope North observations
Date
2009-10-12T13:02:36Z (15 years ago)
From
Cristiano Guidorzi at Ferrara U,Italy <guidorzi@fe.infn.it>
C. Guidorzi (U. Ferrara), A. Gomboc (U. Ljubljana), D. Bersier,
Z. Cano, S. Kobayashi, A. Melandri, C.J. Mottram, C.G. Mundell,
R.J. Smith, I.A. Steele (Liverpool JMU), N.R. Tanvir
(U. Leicester) on behalf of a large collaboration report:
We began observing the SuperAGILE GRB 091010 (Donnarumma
et al. GCN Circ. 10004) with the 2-m Faulkes Telescope North
(FTN) on October 11, 04:54:49 UT (26.2 hours post burst)
with the BVRi' filters.
We clearly detect the GROND afterglow candidate (Rossi
et al. GCN Circ. 10008) with the Ri' filters with the
following magnitudes:
Telescope Mid Time Exposure Filter Mag
(hours) (s)
-------------------------------------------------------
FTN 27.5 7x300 i' 22.11 +- 0.15
FTN 27.6 6x300 R 22.2 +- 0.2
-------------------------------------------------------
Calibration was performed against a nearby USNOB-1 star:
RA(J2000), Dec(J2000)= 19:54:38.242, -22:31:27.11 assuming
R2=14.89 and i'=15.02.
Compared with GROND measurements, we cannot confirm any
fading of the source due to the closeness in time between
our observations.