[AAVSO-HEN] GRB080517: Liverpool Telescope Optical Observations

[grb at aavso.org]

The following is a GCN Circular circulated via the AAVSO network.
For an archive and more information on circulars visit:
http://lheawww.gsfc.nasa.gov/docs/gamcosray/legr/bacodine/gcn3_archive.html

TITLE:   GCN CIRCULAR
NUMBER:  7743
SUBJECT: GRB080517: Liverpool Telescope Optical Observations
DATE:    08/05/17 23:09:10 GMT
FROM:    James Smith at ARI,Liverpool John Moors U  <rjs at astro.livjm.ac.uk>

R.J. Smith (Liverpool JMU), A. Gomboc (Univ. of Ljubljana, Slovenia),
A. Melandri, C. Guidorzi, M. Burgdorf, C.G. Mundell, I.A. Steele, D. 
Carter, A. Monfardini, C.J. Mottram, S. Kobayashi, D. Bersier (Liverpool 
JMU) report:

The 2-m Liverpool Telescope started observing the field of GRB 080517 
(Parsons et al. GCN 7742) at 3 min after the trigger time.

No optical transient has been located in our images to the following 
magnitude limits:

Filter      t_mid (min from GRB)    Exp (s)       Lim
------------------------------------------------------------------
R             16.08                  120          19.6
I             18.93                  120          19.2
------------------------------------------------------------------
Magnitudes were calibrated vs the USNOB1 catalogue.

In particular, comparison with Digitized Sky Survey images shows no 
obvious additional optical source in the vicinity of the known, 
moderately bright object noted to be within the XRT error circle.

Observations stopped one hour after the burst time. No further 
observations are currently planned.