GCN Circular 5807
Subject
GRB 061110B: NOT optical observations
Event
Date
2006-11-11T01:02:28Z (20 years ago)
From
Christina Thoene at Niels Bohr Institute,DARK Cosmo Ctr <cthoene@astro.ku.dk>
Christina C. Thoene, Daniele Malesani, Johan P. U. Fynbo (DARK Cosmology
Centre), Christina Henriksen (DARK, NOT) and Dimitri Sharapov (NOT)
report:
We observed the OT of GRB061110B (GCN 5804) starting Nov. 10, UT 23:20 (1h
after the burst), with ALFOSC at the NOT on La Palma in R and i.
From two sets of 3x300s stacked images, we determined magnitudes of R=22.0
and i=21.5 using preliminary photometric zeropoints from the NOT webpages.
Compared to the R-band magnitude reported in GCN 5804, the OT has faded
with a temporal decay index of alpha~2.3.