[vsnet-grb-info 15174] GRB 140619B: Magellan near-infrared observations

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  16466
SUBJECT: GRB 140619B: Magellan near-infrared observations
DATE:    14/06/27 21:33:59 GMT
FROM:    Wen-fai Fong at CFA  <wfong at cfa.harvard.edu>

W. Fong (Harvard), A. Monson (OCIW), M. Bayliss (Harvard), A. Stark
(Harvard), E. Berger (Harvard), B. Stalder (Harvard), and M. Florian (U.
Chicago) report:

"We observed the location of the short-duration GRB 140619B, detected by
Fermi/GBM (Connaughton et al., GCN 16419), Fermi/LAT (Kocevski et al., GCN
16420), and Suzaku/WAM (Iwakiri et al., GCN 16457) with the FourStar
Infrared Camera mounted on the Magellan/Baade 6.5-m telescope to cover the
Fermi/LAT position (90% containment; Kocevski et al., GCN 16420). We
obtained 770 sec of J-band observations on 2014 Jun 20.96 UT (1.48 days
post-burst). To check for the presence of a fading near-infrared source, we
re-observed the field (2300 sec) on 2014 Jun 21.97 UT, 2.49 days post-burst
and 1.01 days after the first set of observations.

Digital image subtraction of the two epochs using the ISIS software package
reveals no residuals in or around the Fermi/LAT position. We therefore
place a 3-sigma limit of J>22.9 AB mag on the brightness of the
near-infrared afterglow of GRB 140619B at 1.48 days after the burst."