[vsnet-grb-info 20614] GRB 180512A: OASDG optical observations

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  22712
SUBJECT: GRB 180512A: OASDG optical observations
DATE:    18/05/12 23:39:22 GMT
FROM:    Luca Izzo at IAA-CSIC  <Luca.Izzo at ICRA.it>

L. Izzo (HETH/IAA-CSIC) reports:

We observed the field of GRB 180512A (Deich et al., GCN Circ. 22710) with the 0.5m telescope of the Osservatorio Astronomico S. Di Giacomo located in Agerola, Italy ( http://acgo.it/oa )

We began observing at 22:31:54 UT (~30 min after the GRB trigger), and obtained 7x180s images in the Rc band. In our stacked image, we find no source inside the Swift-XRT error box down to a 3-sigma limit of Rc (Vega) > 20.2. The calibration was performed using nearby stars in the USNO B1 catalog.