TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  4035
SUBJECT: GRB050925: Faulkes Telescope North R-band limit
DATE:    05/09/25 12:02:02 GMT
FROM:    Carole Mundell at ARI, JMU,Liverpool  <cgm@astro.livjm.ac.uk>

C. Guidorzi, C.G. Mundell, A. Gomboc, I. A. Steele, C.J. Mottram,
A. Monfardini, R.J. Smith, D. Carter, M.F. Bode (Liverpool JMU),
E. Rol, P. O'Brien, N. Bannister (Leicester) report:

"The 2-m Faulkes North Telescope robotically followed up Swift burst
GRB050925 3.3 min after the GRB trigger time. The automatic "detection
mode" procedure did not detect any obvious candidate brighter than about
R=19 mag from 3x10-s images (mean epoch of 3.7 min after the GRB), with
FOV of 4.6'x4.6' centred on the BAT in-flight location. The field is
crowded and the extinction in V is about 6.3 mag (Schlegel et al. maps).
Visual inspection of the images confirms the reported non-detection.
 
The limiting magnitude is automatically calculated with respect to the
USNOB1.0 'R2' values of the field objects."