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GCN Circular 4035

GRB050925: Faulkes Telescope North R-band limit
2005-09-25T12:02:02Z (19 years ago)
Carole Mundell at ARI, JMU,Liverpool <>
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."
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