GCN Circular 22711
Subject
GRB 180512A: Upper limits from OSN
Date
2018-05-12T23:37:11Z (6 years ago)
From
Alexander Kann at IAA-CSIC <kann@iaa.es>
A. de Ugarte Postigo (HETH/IAA-CSIC, Dark/NBI), L. Izzo, D. A. Kann
(both HETH/IAA-CSIC), and A. Sota (IAA/CSIC) report on behalf of HETH:
We observed the field of GRB 180512A (Deich et al.; GCN Circ. 22710)
with the 1.5-m OSN telescope in Granada, Spain
Observations started at 22:15:35 UT (827 s after the GRB trigger) for
OSN, and we obtained 8x60s images in the Rc band and 6x300s images in
the Ic band. Observations were obtained in inclement conditions (bad
seeing of ~3").
In our stacked images, we find no source inside the Swift-XRT error
circle down to a 3-sigma limit of Ic (Vega) > 21. The calibration was
performed using nearby stars in the SDSS catalog.