GCN Circular 22989
Subject
GRB 180706A: OSN detection
Event
Date
2018-07-21T05:26:20Z (8 years ago)
From
Alexander Kann at IAA-CSIC <kann@iaa.es>
D. A. Kann, L. Izzo (both HETH/IAA-CSIC) and A. Sota (IAA-CSIC) report
on behalf of HETH:
We observed the position of the Swift GRB 180706A (Stamatikos et al.,
GCN #22909) with the T150 telescope of the Observatorio Sierra Nevada
(OSN) near Granada, Spain.
We obtained 6 x 300 s Ic images (mean time after trigger 0.546615 days)
and further 5 x 300 s Ic images a night later (mean time after trigger
1.57231 days).
The afterglow (Stamatikos et al., GCN #22909; Watson et al., GCN #22910;
Oates et al., GCN #22922; Volnova et al., GCN #22923) is clearly
detected in the first night, and we derive Ic = 20.56 +/- 0.06 mag. It
is not detected anymore in the second night to a limit of Ic > 22.5. The
detection magnitude is in good agreement with the earlier measurement of
Volnova et al. when typical Rc-Ic colors of GRBs are taken into account.
The lead author is sorry for the long vacation this data took.