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GCN Circular 9726

Subject
GRB 090728A: Faulkes Telescope North Optical Afterglow Candidate
Date
2009-07-28T15:41:48Z (15 years ago)
From
Andrea Melandri at Liverpool John Moores U <axm@astro.livjm.ac.uk>
A. Melandri, C.G. Mundell, Z. Cano, R.J. Smith, I.A. Steele,
S. Kobayashi, C.J. Mottram, D.F. Bersier (Liverpool JMU),A.
Gomboc (Ljubljana), C. Guidorzi (INAF-OAB) report:

"The 2-m Faulkes Telescope North robotically followed up GRB090728
(SWIFT trigger 358574; Mangano et al. GCN 9725) beginning about 9.6
min after the GRB trigger time.

We identify a rapidly fading optical counterpart at:

RA (J2000)=01:58:36.6
Dec(J2000)=+41:37:59.6

This source is not detected in our R-band images, but is detected
in SDSS-I band images with i'=19.55+/-0.3 mag (at a mean time of
13.2 min after the burst) wrt USNO-B1 I-mag.

Spectroscopic followup is encouraged."
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