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GCN Circular 14158

Subject

GRB 130131A - Faulkes Telescope North Observations

Date

2013-01-31T16:27:53Z (11 years ago)

From

Francisco Virgili at Liverpool John Moores U <fjv@astro.livjm.ac.uk>

F.J. Virgili (LJMU), C. Guidorzi (U. Ferrara), and A. Melandri 
(INAF-OAB) report:

"The 2-m Faulkes Telescope North robotically followed up GRB 130131A
(Swift trigger 547407, Grupe et al. GCN 14156Not found
 
 
) 2.88 min after the GRB 
trigger time. No optical counterpart is detected
within the XRT error circle to the following conservative limits:

Midtime from GRB    Exposure    Filter    Magnitude
       (min)                        (s)
-------------------------------------------------
       3.4                       3x10s         R        >19.2
       28.9                      720s          R        >20.6
       33.7                      700s          i'        >20.1
-------------------------------------------------

Magnitudes are calibrated with nearby USNOB-1 and SDSS stars."