GCN Circular 19964
Subject
GRB 160927A: Magellan imaging
Date
2016-09-28T18:36:06Z (8 years ago)
From
Wen-fai Fong at U of Arizona <wfong@email.arizona.edu>
W. Fong (Univ. of Arizona), S. Sheppard (Carnegie DTM) and E. Berger
(Harvard) report:
We imaged the location of the short-duration GRB 160927A (Gibson et al.,
GCN 19952) with the Inamori-Magellan Areal Camera and Spectrograph (IMACS)
mounted on the Magellan/Baade 6.5-m telescope at a mid-time of 2016 Sep
28.00 UT (5.94 hr post-burst). We obtained 4x200-sec of r-band exposures in
0.75" seeing at an airmass of 1.9. We clearly detect the optical afterglow
(Tkachenko et al., GCN 19954; D'Avanzo et al., GCN 19956; Wiseman et al.,
GCN 19959; Xu et al., GCN 19960). Tied to 10 SDSS stars in the field, we
calculate a magnitude of r_AB=23.84 +/- 0.21, not corrected for Galactic
extinction in the direction of the burst.