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GCN Circular 14510

Subject
GRB 130427A: Continued Skynet/PROMPT Observations
Date
2013-04-30T01:26:11Z (11 years ago)
From
Adam S. Trotter at UNC-Chapel Hill/PROMPT/Skynet <atrotter@physics.unc.edu>
A. Trotter, D. Reichart, J. Haislip, A. LaCluyze, T. Berger, H. T. 
Cromartie, R. Egger, A. Foster, N. Frank, K. Ivarsen, M. Maples, J. 
Moore, M. Nysewander, E. Speckhard, and J. A. Crain report:

Skynet continued observing the Swift/XRT localization of GRB 130427A 
(Maselli et al., GCN 14448, Swift trigger #554620) with four 16" 
telescopes of the PROMPT array at CTIO, Chile, starting at 2013-04-28, 
23:06 UT, and continuing until 04-29, 3:51 UT (t=39.28h-44.03h 
post-trigger). It took ~110 160-s exposures, simultaneously in each of 
the BVRI bands. We performed photometry on each exposure, calibrated to 
two SDSS stars in the field. B-band photometry was performed on stacks 
of 3-4 images in order to provide at least 3sigma detections.

A preliminary light curve of the second's data is at:
http://skynet.unc.edu/grb/grb130427a_2.png

A light curve of both the first and second nights' data is at:
http://skynet.unc.edu/grb/grb130427a_1_2.png

See Trotter et al. (GCN 14497) for a description of the first night's 
observations.  Further Skynet observations are ongoing.
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