GCN Circular 10127
Subject
GRB 091102 : Faulkes Telescope South Upper Limits
Date
2009-11-03T12:07:11Z (15 years ago)
From
Zach Cano at ARI/John Moores Liverpool <zec@astro.livjm.ac.uk>
Z. Cano (Liverpool JMU), C. Guidorzi (U. Ferrara), A. Melandri, C.G.
Mundell, D.Bersier, N.R. Clay, S. Kobayashi, C.J. Mottram, R.J. Smith,
I.A. Steele (Liverpool JMU), A. Gomboc (U. Ljubljana)on behalf of a larger
collaboration report:
Following Swift detection of GRB 091102 (Hoversten et al. GCN Circ.
10117), Faulkes Telescope South (Australia) reacted automatically and
began observing at 14:37:06 UT in BVRi. We detect no new source within
the XRT error circle (Baumgartner et al., GCN 10121).
In our first R-band image, which is contemporaneous with the images taken
by A. de Ugarte Postigo et al. (GCN 10122), we do not detect their
afterglow candidate.
We have attached a finder chart of the GCN field (taken at T-To=186s):
http://www.fe.infn.it/u/guidorzi/GRB091102/091102_FTS_DM.jpg
We find the following upper limits, as calibrated against nearby USNO
object 0174-0110239:
T_exp T-T0(mid exposure) mag_limit
-----------------------------------------
30s 186 s R2 > 19.7
120s 2.07 hrs B2 > 18.7
120s 2.18 hrs I2 > 20.7
120s 2.12 hrs R2 > 20.2
