[vsnet-grb-info 17201] GRB 151029A: FRAM optical afterglow detection

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  18554
SUBJECT: GRB 151029A: FRAM optical afterglow detection
DATE:    15/11/03 13:42:46 GMT
FROM:    Martin Jelinek at Astro.Inst.ASU-AVCR,Ondrejov  <martin.jelinek at asu.cas.cz>

Martin Jelinek (Astronomical Institute ASU-AVCR Ondrejov),
Michael Prouza, Jan Ebr, Petr Janecek, Martin Masek
(Institute of Physics FZU-CAS Praha) and
Samantha Oates (IAA CSIC Granada + UCL MSSL)

"The 0.30m robotic telescope FRAM located in Malargue,
Argentina, observed the reported location of GRB 151029A
(Ukwatta GCNC 18522) starting 884s after the corrected
trigger time (Barthelmy GCNC 18535), 8.9s after receiving
the trigger.

The telescope obtained a 30 minute set of unfiltered
exposures. The optical afterglow (Oates GCNC 18531,
Knust GCNC 18523, Tanvir GCNC 18524) can be detected
on combined exposures.

In the first combined image, with the mean time of individual
exposures 08:07:27 UT (1068s post trigger), we measure
magnitude 17.7 +/- 0.2. The calibration was done with three
nearby USNO-B2.0 stars."