Gamma-ray Burst 130419A

(All information courtesy of the instrument teams.)

Previous IAU Circulars

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Results of Observations

GCN/BACODINE POSITION NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 19 Apr 13 13:32:35 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     553918,   Seg_Num: 0
GRB_RA:          355.271d {+23h 41m 05s} (J2000),
                 355.440d {+23h 41m 46s} (current),
                 354.634d {+23h 38m 32s} (1950)
GRB_DEC:          +9.977d {+09d 58' 38"} (J2000),
                 +10.051d {+10d 03' 03"} (current),
                  +9.700d {+09d 41' 59"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       0 [cnts]    Image_Peak=1589 [image_cnts]
TRIGGER_DUR:     112.000 [sec] 
TRIGGER_INDEX:   20000     E_range: 15-50 keV
BKG_INTEN:       0 [cnts]
BKG_TIME:        0.00 SOD {00:00:00.00} UT
BKG_DUR:         0 [sec]
GRB_DATE:        16401 TJD;   109 DOY;   13/04/19
GRB_TIME:        48629.54 SOD {13:30:29.54} UT
GRB_PHI:         -133.28 [deg]
GRB_THETA:        23.28 [deg]
SOLN_STATUS:     0x13
RATE_SIGNIF:     0.00 [sigma]
IMAGE_SIGNIF:    7.58 [sigma]
MERIT_PARAMS:     +1  +0  +0  +7  +1  -2 -100  +0 -85  +0 
SUN_POSTN:        27.58d {+01h 50m 20s}  +11.35d {+11d 20' 59"}
SUN_DIST:         31.59 [deg]   Sun_angle= 2.1 [hr] (West of Sun)
MOON_POSTN:      132.22d {+08h 48m 52s}  +12.35d {+12d 20' 57"}
MOON_DIST:       131.57 [deg]
MOON_ILLUM:      60 [%]
GAL_COORDS:       95.86,-49.16 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      359.67, 11.03 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS:        SWIFT-BAT GRB Coordinates.  
COMMENTS:        This is an image trigger.  (The RATE_SIGNIF & BKG_{INTEN, TIME, DUR} are undefined.)  
COMMENTS:        A point_source was found.  
COMMENTS:        This does not match any source in the on-board catalog.  
COMMENTS:        This does not match any source in the ground catalog.  
COMMENTS:        This is a GRB.  
COMMENTS:        This trigger occurred at longitude,latitude = 357.27,13.71 [deg].

red DSS finding chart ps-file

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 19 Apr 13 13:35:14 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     553918,   Seg_Num: 0
GRB_RA:          355.271d {+23h 41m 05s} (J2000),
                 355.440d {+23h 41m 46s} (current),
                 354.634d {+23h 38m 32s} (1950)
GRB_DEC:          +9.977d {+09d 58' 38"} (J2000),
                 +10.051d {+10d 03' 03"} (current),
                  +9.700d {+09d 41' 59"} (1950)
GRB_DATE:        16401 TJD;   109 DOY;   13/04/19
GRB_TIME:        48629.54 SOD {13:30:29.54} UT
TRIGGER_INDEX:   20000
GRB_PHI:         -133.28 [deg]
GRB_THETA:        23.28 [deg]
DELTA_TIME:      0.00 [sec]
TRIGGER_DUR:     112.000 [sec] 
SOLN_STATUS:     0x13
RATE_SIGNIF:     0.00 [sigma]
IMAGE_SIGNIF:    7.58 [sigma]
LC_URL:          sw00553918000msb.lc
SUN_POSTN:        27.58d {+01h 50m 20s}  +11.35d {+11d 21' 01"}
SUN_DIST:         31.60 [deg]   Sun_angle= 2.1 [hr] (West of Sun)
MOON_POSTN:      132.24d {+08h 48m 57s}  +12.34d {+12d 20' 35"}
MOON_DIST:       131.60 [deg]
MOON_ILLUM:      60 [%]
GAL_COORDS:       95.86,-49.16 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      359.67, 11.03 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS:        SWIFT-BAT GRB Lightcurve.  
COMMENTS:           
COMMENTS:        The next comments were copied from the BAT_POS Notice:  
COMMENTS:        This is an image trigger.  
COMMENTS:        A point_source was found.  
COMMENTS:        This does not match any source in the on-board catalog.  
COMMENTS:        This does not match any source in the ground catalog.  
COMMENTS:        This is a GRB.  
COMMENTS:        This trigger occurred at longitude,latitude = 357.27,13.71 [deg].

GCN Circular #14391
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 slewed immediately to the burst. 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 Circular #14399
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/

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Jochen Greiner, last update: 19-Apr-2013 [Disclaimer]