[vsnet-grb-info 6426] GRB 080727C: Liverpool Telescope observations

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  8040
SUBJECT: GRB 080727C: Liverpool Telescope observations
DATE:    08/07/28 10:01:03 GMT
FROM:    Cristiano Guidorzi at INAF-OAB  <cristiano.guidorzi at brera.inaf.it>

C. Guidorzi (INAF-OAB), S. Kobayashi, M.J. Burgdorf (Liverpool JMU)
and N. Tanvir (U. Leicester) report on behalf of a larger collaboration:

On 2008 July 28 (01:35:55 UT) we began observing the field of GRB 080727C
(Parsons et al. GCN Circ. 8035) with the Liverpool Telescope.
Observations consisted of 6x300s exposures acquired using the SDSS-i'
filter.

In our coadded frame we do not detect any source inside the refined XRT
error box (Osborne et al. GCN Circ. 8038) down to the limiting magnitude
reported below.

Telescope   Filter  T_mid[s]   Exposure[s]    M_lim (3-sigma)

-------------------------------------------------------------
Liverpool   SDSS-i'  9830        6x300         22.8
-------------------------------------------------------------

The calibration was performed using the I magnitudes of several USNOB-1
catalogue field objects. The value derived by us is consistent with
that given by Bikmaev et al. (GCN Circ. 8036).