GCN Circular 23276
Subject
GRB 180925A: VLT optical observations
Date
2018-09-27T19:52:07Z (6 years ago)
From
Daniele Malesani at Dark Cosmology Centre, Niels Bohr Inst <malesani@dark-cosmology.dk>
D. B. Malesani (DAWN/NBI and DARK/NBI), P. Schady (Univ. Bath), C. C.
Thoene (HETH/IAA-CSIC), D. A. Kann (HETH/IAA-CSIC), and N. R. Tanvir
(Univ. Leicester) report on behalf of the Stargate collaboration:
We observed the optical counterpart of GRB 180925A (Gropp et al., GCN
23268; Emery & Gropp, GCN 23274) using the ESO VLT UT2 (Kueyen) equipped
with the X-shooter instrument. A 60-seconds image in the SDSS r filter
was taken with the acquisition camera, at approximate time 2018
September 26.17 UT (0.56 days after the GRB).
At a location consistent with that of the UVOT afterglow (Emery & Gropp,
GCN 23274), a faint source is marginally visible. Forced photometry,
calibrated against nearby USNO-B1 stars, yields R = 22.9 +- 0.4 (Vega).
No further observations are planned.
We acknowledge support from the ESO staff at Paranal, in particular Joe
Anderson and Jorge Lillo-Box.