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GCN Circular 13125

Subject

GRB 120327A: Liverpool Telescope Observations

Date

2012-03-27T04:16:30Z (12 years ago)

From

James Smith at ARI,Liverpool John Moors U <rjs@astro.livjm.ac.uk>

R.J. Smith, Francisco Virgili (Liverpool JMU) report on behalf of the LJMU GRB group:

The 2-m Liverpool Telescope automatically observed Swift GRB 120327A (Sbarufatti et al., GCN Circ. 13123Not found
 
 
) on March 27, from 03:22:59.1 UT, corresponding to 27.7 minutes after the BAT trigger time. Within the XRT error circle we clearly detect an fading optical source at

  16:27:27.46 , -29:24:54.00 J2000

with an uncertainty of 0.6 arcsec, confirming the observations of Klotz et al (GCN 13124Not found
 
 
). We estimate the magnitude of the afterglow as follows:

Mid time from    Exp     Filter    Magnitude
GRB (min)        (s)
---------------------------------------------
34.9             10    R        16.1 +/- 0.3
64.5             60    R        17.0 +/- 0.3
---------------------------------------------

Magnitudes are calibrated against nearby USNOB-1 stars.

Observations are continuing.