[vsnet-grb-info 17961] GRB 160509A: optical observations

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  19409
SUBJECT: GRB 160509A: optical observations
DATE:    16/05/09 16:52:26 GMT
FROM:    Luca Izzo at ICRA  <Luca.Izzo at ICRA.it>

L.Izzo (IAA-CSIC), A. de Ugarte Postigo (IAA-CSIC, DARK/NBI), C. Thoene
(IAA-CSIC) report:

We observed the field of GRB 160509A (Longo et al., GCN 19403; Ono et al.,
GCN 19404) with the iTelescope.Net <http://itelescope.net> (
http://www.itelescope.net)
T11 (Planewave CDK 0.51m) telescope located at the Mayhill observatory
(NM).
A single image of 300 s was obtained in the R filter, starting at 10:32:32
UT, 1.56 hr
after the GRB trigger. We do not detect any optical afterglow candidate at
the refined Swift-XRT position (Kennea et al. GCN 19408). We estimate an
upper limit magnitude of R = 19.5 mag (3-sigma), using the USNO-B1 catalog
as reference. We note that our image covers also the complete error box of
the MAXI (Ono et al., GCN 19404). Data are available on request.

An image of the field of view can be seen at http://goo.gl/dKTki3