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TITLE:   GCN CIRCULAR
NUMBER:  14391
SUBJECT: GRB 130419A: Swift detection of a burst
DATE:    13/04/19 13:39:56 GMT
FROM:    David Palmer at LANL  <palmer@lanl.gov>

N. P. M. Kuin (UCL-MSSL), D. N. Burrows (PSU), V. D'Elia (ASDC),
P. A. Evans (U Leicester), S. T. Holland (STScI), J. A. Kennea (PSU),
F. E. Marshall (NASA/GSFC), K. L. Page (U Leicester),
D. M. Palmer (LANL), P. Romano (INAF-IASFPA), M. H. Siegel (PSU) and
R. L. C. Starling (U Leicester) report on behalf of the Swift Team:

At 13:30:29 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 130419A (trigger=553918).  Swift did not slew due to Sun constraint.
The BAT on-board calculated location is 
RA, Dec 355.271, +9.977 which is 
   RA(J2000) = 23h 41m 05s
   Dec(J2000) = +09d 58' 38"
with an uncertainty of 3 arcmin (radius, 90% containment, including 
systematic uncertainty).  As is usual for image triggers, there is no
obvious variation in BAT's immediately-avaialble lightcurve. 

Due to a Sun observing constraint, Swift cannot slew to the BAT
position until 00:33 UT on 2013 May 06. There will thus be no XRT or
UVOT data for this trigger before this time. 

Burst Advocate for this burst is N. P. M. Kuin (n.kuin AT ucl.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 OPS NOTE(05dec14):  By author's request, the "Swift slewed immediately"
sentence in the first paragraph was changed.]

////////////////////////////////////////////////////////////////////////
TITLE:   GCN CIRCULAR
NUMBER:  14399
SUBJECT: GRB 130419A, Swift-BAT refined analysis
DATE:    13/04/19 20:22:04 GMT
FROM:    Hans Krimm at NASA-GSFC  <hans.a.krimm@nasa.gov>

H. A. Krimm (GSFC/USRA),S. D. Barthelmy (GSFC),
W. H. Baumgartner (GSFC/UMBC),J. R. Cummings (GSFC/UMBC),
N. Gehrels (GSFC),N. P. M. Kuin (UCL-MSSL),A. Y. Lien (NASA/GSFC/ORAU),
C. B. Markwardt (GSFC),D. M. Palmer (LANL),T. Sakamoto (AGU),
M. Stamatikos (OSU),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 130419A (trigger #553918)
(Kuin, et al., GCN Circ. 14391). The BAT ground-calculated position is
RA, Dec = 355.278, 9.900 deg which is
    RA(J2000)  =  23h 41m 06.7s
    Dec(J2000) = +09d 54' 00.6"
with an uncertainty of 2.6 arcmin, (radius, sys+stat, 90% containment).
The partial coding was 82%.

The mask-weighted light curve shows a single long period of emission starting
about T+30 sec, peaking at T+60 sec and declining until T+140 sec.  There is
weak secondary peak at T+120 sec superimposed on the main declining emission.
A slew took the source out of the BAT field of view around T+280 sec.
T90 (15-350 keV) is 75.7 +- 49.6 sec (estimated error including systematics).

The time-averaged spectrum from T+40.09 to T+169.51 sec is best fit by a simple
power-law model.  The power law index of the time-averaged spectrum is
1.43 +- 0.28.  The fluence in the 15-150 keV band is 7.8 +- 1.4 x 10^-7 erg/cm2.
The 1-sec peak photon flux measured from T+55.43 sec in the 15-150 keV band
is 0.3 +- 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/553918/BA/