GCN Circular 15030
Subject
GRB 130719A: Skynet/PROMPT observations
Date
2013-07-25T18:43:14Z (12 years ago)
From
Adam S. Trotter at UNC-Chapel Hill/PROMPT/Skynet <atrotter@physics.unc.edu>
A. Trotter, D. Reichart, A. LaCluyze, J. Haislip, T. Berger, M. Carroll,
H. T. Cromartie, R. Egger, A. Foster, C. Foster, N. Frank, K. Ivarsen,
D. James, M. Maples, J. Moore, M. Nysewander, E. Speckhard, P. Taylor,
and J. A. Crain report
Skynet observed the Swift/BAT localization of GRB 130719A (Marshall et
al., GCN 15012, Swift trigger #562625) with four 16" telescopes of the
PROMPT array at CTIO, Chile. Starting at 2013-07-19, 19:17 UT and
continuing until 09:20 UT (t=3.53-4.84h post-trigger), it took ~28
160-sec exposures in each of the BVRI bands. We did not detect a
credible afterglow candidate within the 3 arcmin radius of the Swift/BAT
error circle, which was centered on RA 05:56:09.4, Dec -11:35:04.
We stacked all the images in each band and obtained 3-sigma limiting
magnitudes on any afterglow at t~4.2h:
Filter B V R I
Mag >21.2 >20.6 >20.7 >20.3
Magnitudes are Vega magnitudes, calibrated to 3 USNO-B1/NOMAD stars in
the field, and have not been corrected for the expected line-of-sight
Milky Way dust extinction E(B-V)~0.7 (Schlegel et al. 1998).
No further Skynet observations are scheduled.