GCN Circular 20169
Subject
GRB 161109A: Swift/UVOT Upper Limits
Date
2016-11-11T15:34:35Z (8 years ago)
From
Sam Emery at MSSL-UCL <samuel.emery.15@ucl.ac.uk>
S. W. K Emery (MSSL-UCL) and A. D'Ai (INAF-IASFPA) report on behalf
of the Swift/UVOT team:
Swift-UVOT performed follow-up observations of the Fermi/LAT-detected
burst GRB 161109A (Desiante et al. GCN Circ. 20155) in a series of
observations tiled on the sky. Observations were taken in the u band
filter between T0+40.4 ks and T0+63.3 ks after the Fermi trigger.
Swift/UVOT did not find any new optical counterpart. The 3 sigma
upper limits at the position of each of the uncatalogued X-ray sources (Gibson et
al. GCN Circ. 20164) are:
Source T_start (s) T_end (s) Exposure Time (s) filter 3s UL
Source 2 40425 57980 1152 u 20.11
Source 3 40425 57980 1152 u 20.08
Source 6 41245 63272 1121 u 19.22
The magnitudes in the table are not corrected for the Galactic
extinction due to the reddening of E(B-V) = 0.01 in the direction of
the burst (Schlegel et al. 1998).