Circular_text |
TITLE: GCN CIRCULAR
NUMBER: 15030
SUBJECT: GRB 130719A: Skynet/PROMPT observations
DATE: 13/07/25 18:43:14 GMT
FROM: Adam S. Trotter at UNC-Chapel Hill/PROMPT/Skynet
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.
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