GRB 130719A

F. E. Marshall (NASA/GSFC), J. R. Cummings (NASA/UMBC),
V. D'Elia (ASDC), C. Gronwall (PSU), P. T. O'Brien (U Leicester) and
D. M. Palmer (LANL) report on behalf of the Swift Team:

At 05:47:49 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 130719A (trigger=562625).  Swift could not slew to the burst
due to a Sun constraint. 
The BAT on-board calculated location is 
RA, Dec 89.039, -11.585 which is 
   RA(J2000) = 05h 56m 09s
   Dec(J2000) = -11d 35' 03"
with an uncertainty of 3 arcmin (radius, 90% containment, including 
systematic uncertainty).  The BAT light curve is dominated by
variation from Vela X-1, which is also in the FOV, so nothing
can be stated about the burst light curve for this image
trigger at this time. 

Due to the Sun constraint, XRT and UVOT will not be able to
observe the burst location until July 26. 

Burst Advocate for this burst is F. E. Marshall (marshall AT milkyway.gsfc.nasa.gov). 
Please contact the BA by email if you require additional information
regarding Swift followup of this burst. In extremely urgent cases, after
trying the Burst Advocate, you can contact the Swift PI by phone (see
Swift TOO web site for information: http://www.swift.psu.edu/too.html.)

M. Stamatikos (OSU), S. D. Barthelmy (GSFC), W. H. Baumgartner (GSFC/UMBC),
J. R. Cummings (GSFC/UMBC),E. E. Fenimore (LANL), N. Gehrels (GSFC),
H. A. Krimm (GSFC/USRA), A. Y. Lien (NASA/GSFC/ORAU), C. B. Markwardt (GSFC),
F. E. Marshall (NASA/GSFC), D. M. Palmer (LANL), T. Sakamoto (AGU),
G. Sato (ISAS), J. Tueller (GSFC), T. N. Ukwatta (MSU)
(i.e. the Swift-BAT team):
  
Using the data set from T-239 to T+963 sec from the recent telemetry downlink,
we report further analysis of BAT GRB 130719A (trigger #562625) (Marshall,
et al., GCN Circ. 15012
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 ).  The BAT ground-calculated position is
RA, Dec = 89.038, -11.591 deg which is
    RA(J2000)  =  05h 56m 09.2s
    Dec(J2000) = -11d 35' 29.0"
with an uncertainty of 1.9 arcmin, (radius, sys+stat, 90% containment).
The partial coding was 50%.
  
The mask-weighted light curve shows a single weak approximately FRED peak.
T90 (15-350 keV) is 177.7 +- 20.5 sec (estimated error including systematics).
  
The time-averaged spectrum from T+6.2 to T+205.2 sec is best fit by a simple
power-law model.  The power law index of the time-averaged spectrum is
1.63 +- 0.17.  The fluence in the 15-150 keV band is 2.3 +- 0.2 x 10^-06 erg/cm2.
The 1-sec peak photon flux measured from T+82.68 sec in the 15-150 keV band
is 0.6 +- 0.2 ph/cm2/sec.  All the quoted errors are at the 90% confidence
level.
  
The results of the batgrbproduct analysis are available at
http://gcn.gsfc.nasa.gov/notices_s/562625/BA/

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
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 , 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.