[vsnet-grb-info 9652] GRB 100816A: NOT optical observations

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  11120
SUBJECT: GRB 100816A: NOT optical observations
DATE:    10/08/17 09:24:04 GMT
FROM:    Daniele Malesani at Dark Cosmology Centre, Niels Bohr Inst  <malesani at dark-cosmology.dk>

D. Malesani (DARK/NBI), D. Xu (Weizmann Inst.), J.P.U. Fynbo (DARK/NBI), 
P. Jakobsson (Univ. Iceland), and L. Buchhave (NBI), report on behalf of 
a larger collaboration:

We observed the field of GRB 100816A (Oates et al., GCN 11102) with the 
NOT equipped with ALFOSC. Observations were carried out in the R band. 
The mid point of the observation is August 17.04 UT (24.3 hr after the GRB).

We clearly detect both the optical afterglow (Oates et al., GCN 11102) 
and the putative host galaxy (Im et al., GCN 11108; Tanvir et al., GCN 
11109). We find magnitudes of R = 23.0 +- 0.1 and R = 21.65 +- 0.05 for 
the two objects, respectively, assuming R=17.06 for the nearby USNO star 
1165-0595190. We caution that accurate photometry will have to await for 
late-time templates to isolate the contribution of both objects.