GRB 140719B
GCN Circular 16609
Subject
GRB 140719B: Swift detection of a burst
Date
2014-07-19T21:03:42Z (11 years ago)
From
Rhaana Starling at U of Leicester <rlcs1@star.le.ac.uk>
R. L. C. Starling (U Leicester), W. H. Baumgartner (GSFC/UMBC),
S. B. Cenko (GSFC), L. M. Z. Hagen (PSU),
C. J. Mountford (U Leicester), D. M. Palmer (LANL) and
T. Sakamoto (AGU) report on behalf of the Swift Team:
At 20:49:35.68 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 140719B (trigger=605700). Due to a Moon constraint, Swift
could not slew to the burst.
The BAT on-board calculated location is
RA, Dec 39.738d, -2.378d which is
RA(J2000) = 02h 38m 57s
Dec(J2000) = -02d 22' 39"
with an uncertainty of 3 arcmin (radius, 90% containment, including
systematic uncertainty). The BAT light curve showed a complex
structure with a duration of about 50 sec. The peak count rate
was ~900 counts/sec (15-350 keV), at ~2 sec after the trigger.
Due to a Moon observing constraint, Swift cannot slew to the BAT
position until 06:44 UT on 2014 July 21. There will thus be no XRT or
UVOT data for this trigger before this time.
Burst Advocate for this burst is R. L. C. Starling (rlcs1 AT star.le.ac.uk).
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.)
GCN Circular 16610
Subject
GRB 140719B: Zadko observatory - Gingin optical observations
Date
2014-07-20T00:16:00Z (11 years ago)
From
Alain Klotz at IRAP-CNRS-OMP <Alain.Klotz@free.fr>
A. Klotz, D. Turpin (IRAP-CNRS-OMP), D. Macpherson (UWA/ICRAR), D.
Coward (UWA),
M. Boer, B. Gendre, K. Siellez, H. Dereli, O. Bardho (UNS-CNRS-OCA),
A. Williams (PO-UWA), R. Martin (PO-UWA)
report:
We imaged the field of GRB 140719B detected by SWIFT
(trigger 605700) with the Zadko robotic telescope (D=100cm)
located at the observatory - Gingin, Australia.
The observations started 85s after the GRB trigger
(33s after the notice). The elevation of the field increased from
46 degrees above horizon and weather conditions
were good.
The first image is trailed with a duration of 60.0s
(see the description in Klotz et al., 2006, A&A 451, L39).
We do not detect any OT with a limiting magnitude of:
t0+85s to t0+145s : R > 16.5
The second image is 30.0s exposure in tracking mode:
t0+163s to t0+193s : R > 18.5
We co-added a series of exposures:
t0+163s to t0+446s : R > 19.0
Magnitudes were estimated with the nearby USNO-B1 stars
and are not corrected for galactic dust extinction.
GCN Circular 16615
Subject
GRB 140719B, Swift-BAT refined analysis
Date
2014-07-21T06:18:24Z (11 years ago)
From
Amy Lien at GSFC <amy.y.lien@nasa.gov>
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), D. M. Palmer (LANL),
T. Sakamoto (AGU), G. Sato (ISAS), M. Stamatikos (OSU), R. L. C. Starling (U Leicester),
J. Tueller (GSFC), T. N. Ukwatta (MSU)
(i.e. the Swift-BAT team):
Using the data set from T-240 to T+962 sec from the recent telemetry downlink,
we report further analysis of BAT GRB 140719B (trigger #605700)
(Starling, et al., GCN Circ. 16609). The BAT ground-calculated position is
RA, Dec = 39.731, -2.384 deg which is
RA(J2000) = 02h 38m 55.4s
Dec(J2000) = -02d 23' 03.5"
with an uncertainty of 1.7 arcmin, (radius, sys+stat, 90% containment).
The partial coding was 42%.
The mask-weighted light curve shows a single peak starting at ~T-18 s sec,
peaking at ~T+2 sec, and ending at ~T+60 sec.
T90 (15-350 keV) is 53.0 +- 13.5 sec (estimated error including systematics).
The time-averaged spectrum from T-17 to T+49 sec is best fit by a simple
power-law model. The power law index of the time-averaged spectrum is
1.8 +- 0.2. The fluence in the 15-150 keV band is 1.3 +- 0.1 x 10^-6 erg/cm2.
The 1-sec peak photon flux measured from T-4.97 sec in the 15-150 keV band
is 0.7 +- 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/605700/BA/
GCN Circular 16619
Subject
GRB 140719B: Swift XRT observation
Date
2014-07-22T06:09:24Z (11 years ago)
From
Rhaana Starling at U of Leicester <rlcs1@star.le.ac.uk>
R. L. C. Starling (U. Leicester) reports on behalf of the Swift-XRT team:
Swift slewed to GRB 140719B (trigger=605700, Starling et al. GCN Circ. 16609) on 2014-07-21,
delayed due to a moon constraint.
Observations with the XRT began at 07:59:24UT and comprised a total of 6.87 ks in photon counting
mode spanning 126.6 - 140.1 ks after the BAT trigger. We do not detect any X-ray sources within the
BAT refined error circle (Barthelmy et al. GCN Circ. 16615), and place a 3-sigma upper limit on the
count rate at the BAT position of 0.003 count s^-1.
This circular is an official product of the Swift-XRT team.