Gamma-ray Burst 140305A

(All information courtesy of the instrument teams.)

Previous IAU Circulars

none

Results of Observations

GCN/BACODINE POSITION NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 05 Mar 14 15:00:35 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     590446,   Seg_Num: 0
GRB_RA:          344.533d {+22h 58m 08s} (J2000),
                 344.709d {+22h 58m 50s} (current),
                 343.913d {+22h 55m 39s} (1950)
GRB_DEC:         +15.441d {+15d 26' 29"} (J2000),
                 +15.517d {+15d 31' 03"} (current),
                 +15.173d {+15d 10' 25"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       4373 [cnts]    Image_Peak=163 [image_cnts]
TRIGGER_DUR:     1.024 [sec] 
TRIGGER_INDEX:   146     E_range: 25-100 keV
BKG_INTEN:       28323 [cnts]
BKG_TIME:        54004.27 SOD {15:00:04.27} UT
BKG_DUR:         8 [sec]
GRB_DATE:        16721 TJD;    64 DOY;   14/03/05
GRB_TIME:        54020.66 SOD {15:00:20.66} UT
GRB_PHI:         -84.19 [deg]
GRB_THETA:        27.68 [deg]
SOLN_STATUS:     0x3
RATE_SIGNIF:     11.70 [sigma]
IMAGE_SIGNIF:    7.27 [sigma]
MERIT_PARAMS:     +1  +0  +0  +0  +2  -3 -100  +0 -93  +0 
SUN_POSTN:       346.15d {+23h 04m 35s}   -5.92d {-05d 55' 29"}
SUN_DIST:         21.49 [deg]   Sun_angle= 0.1 [hr] (West of Sun)
MOON_POSTN:       38.96d {+02h 35m 51s}  +14.18d {+14d 10' 35"}
MOON_DIST:        52.32 [deg]
MOON_ILLUM:      22 [%]
GAL_COORDS:       86.69,-39.33 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      352.04, 20.28 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS:        SWIFT-BAT GRB Coordinates.  
COMMENTS:        This is a rate 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 = 343.28,8.43 [deg].

red DSS finding chart ps-file

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 05 Mar 14 15:03:49 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     590446,   Seg_Num: 0
GRB_RA:          344.533d {+22h 58m 08s} (J2000),
                 344.709d {+22h 58m 50s} (current),
                 343.913d {+22h 55m 39s} (1950)
GRB_DEC:         +15.441d {+15d 26' 29"} (J2000),
                 +15.517d {+15d 31' 03"} (current),
                 +15.173d {+15d 10' 25"} (1950)
GRB_DATE:        16721 TJD;    64 DOY;   14/03/05
GRB_TIME:        54020.66 SOD {15:00:20.66} UT
TRIGGER_INDEX:   146
GRB_PHI:         -84.19 [deg]
GRB_THETA:        27.68 [deg]
DELTA_TIME:      -37.00 [sec]
TRIGGER_DUR:     1.024 [sec] 
SOLN_STATUS:     0x3
RATE_SIGNIF:     11.70 [sigma]
IMAGE_SIGNIF:    7.27 [sigma]
LC_URL:          sw00590446000msb.lc
SUN_POSTN:       346.15d {+23h 04m 36s}   -5.92d {-05d 55' 26"}
SUN_DIST:         21.49 [deg]   Sun_angle= 0.1 [hr] (West of Sun)
MOON_POSTN:       38.99d {+02h 35m 58s}  +14.18d {+14d 10' 58"}
MOON_DIST:        52.35 [deg]
MOON_ILLUM:      22 [%]
GAL_COORDS:       86.69,-39.33 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      352.04, 20.28 [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 a rate 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 = 343.28,8.43 [deg].

GCN Circular #15929
A. Maselli (INAF-IASFPA), S. D. Barthelmy (GSFC), P. A. Evans (U Leicester), S. T. Holland (STScI), J. A. Kennea (PSU), H. A. Krimm (CRESST/GSFC/USRA), K. L. Page (U Leicester), P. Romano (INAF-IASFPA) and M. H. Siegel (PSU) report on behalf of the Swift Team:
At 15:00:20 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 140305A (trigger=590446). Swift did not slew to this burst because of the Sun constraint. The BAT on-board calculated location is RA, Dec 344.533, +15.441, which is
```
   RA(J2000)  =  22h 58m 08s
   Dec(J2000) = +15d 26' 29"
```
with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve shows a cluster of peaks with a total duration of about 25 sec. The peak count rate was ~1700 counts/sec (15-350 keV), at ~1 sec after the trigger.
Due to a Sun observing constraint, Swift cannot slew to the BAT position until 16:35 UT on 2014 April 25. There will thus be no XRT or UVOT data for this trigger before this time.
Burst Advocate for this burst is A. Maselli (maselli AT ifc.inaf.it). 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 NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 05 Mar 14 23:22:55 UT
NOTICE_TYPE:     Swift-XRT Image
TRIGGER_NUM:     590503,   Seg_Num: 0
GRB_RA:           59.2684d {+03h 57m 04.4s} (J2000),
                  59.3727d {+03h 57m 29.4s} (current),
                  58.9007d {+03h 55m 36.1s} (1950)
GRB_DEC:         -48.7289d {-48d 43' 44.0"} (J2000),
                 -48.6886d {-48d 41' 19.0"} (current),
                 -48.8719d {-48d 52' 18.9"} (1950)
GRB_ERROR:       5.4 [arcsec, radius, statistical plus systematic]
GRB_INTEN:       20 [cnts]
IMG_START_DATE:  16721 TJD;    64 DOY;   14/03/05
IMG_START_TIME:  84052.79 SOD {23:20:52.79} UT,   135.7 [sec] since BAT Trigger Time
CENTROID_X:      393.09,  raw= 393  [pixels]
CENTROID_Y:      26.29,  raw= 26  [pixels]
ROLL:            279.39 [deg]
GAIN:            1
MODE:            2, Short Image mode
WAVEFORM:        134
EXPO_TIME:       0.10 [sec]
GRB_POS_XRT_Y:   -640.01
GRB_POS_XRT_Z:   206.97
IMAGE_URL:       sw00590503000msxps_rw.img
SUN_POSTN:       346.47d {+23h 05m 53s}   -5.79d {-05d 47' 23"}
SUN_DIST:         74.40 [deg]   Sun_angle= -4.9 [hr] (East of Sun)
MOON_POSTN:       43.58d {+02h 54m 18s}  +15.16d {+15d 09' 18"}
MOON_DIST:        65.37 [deg]
MOON_ILLUM:      25 [%]
GAL_COORDS:      256.94,-48.37 [deg] galactic lon,lat of the burst
ECL_COORDS:       33.28,-66.22 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Image.  
COMMENTS:        WARNING: The centroided position is more than 100 rows or columns from the center of the FOV.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 05 Mar 14 23:23:05 UT
NOTICE_TYPE:     Swift-XRT Processed Image
TRIGGER_NUM:     590503,   Seg_Num: 0
GRB_RA:           59.2684d {+03h 57m 04.4s} (J2000),
                  59.3727d {+03h 57m 29.4s} (current),
                  58.9007d {+03h 55m 36.1s} (1950)
GRB_DEC:         -48.7289d {-48d 43' 44.0"} (J2000),
                 -48.6886d {-48d 41' 19.0"} (current),
                 -48.8719d {-48d 52' 18.9"} (1950)
GRB_ERROR:       5.4 [arcsec, radius, statistical plus systematic]
GRB_INTEN:       20 [cnts]
IMG_START_DATE:  16721 TJD;    64 DOY;   14/03/05
IMG_START_TIME:  84052.79 SOD {23:20:52.79} UT,   135.7 [sec] since BAT Trigger Time
CENTROID_X:      393.09,  raw= 393  [pixels]
CENTROID_Y:      26.29,  raw= 26  [pixels]
ROLL:            279.39 [deg]
GAIN:            1
MODE:            2, Short Image mode
WAVEFORM:        134
EXPO_TIME:       0.10 [sec]
GRB_POS_XRT_Y:   -640.01
GRB_POS_XRT_Z:   206.97
IMAGE_URL:       sw00590503000msxps_rw.img
SUN_POSTN:       346.47d {+23h 05m 53s}   -5.79d {-05d 47' 22"}
SUN_DIST:         74.40 [deg]   Sun_angle= -4.9 [hr] (East of Sun)
MOON_POSTN:       43.58d {+02h 54m 18s}  +15.16d {+15d 09' 19"}
MOON_DIST:        65.37 [deg]
MOON_ILLUM:      25 [%]
GAL_COORDS:      256.94,-48.37 [deg] galactic lon,lat of the burst
ECL_COORDS:       33.28,-66.22 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Processed Image.

GCN Circular #15934
J. R. Cummings (GSFC/UMBC), S. D. Barthelmy (GSFC), W. H. Baumgartner (GSFC/UMBC), N. Gehrels (GSFC), H. A. Krimm (GSFC/USRA), A. Y. Lien (NASA/UMBC), C. B. Markwardt (GSFC), A. Maselli (INAF-IASFPA), D. M. Palmer (LANL), T. Sakamoto (AGU), M. Stamatikos (OSU), J. Tueller (GSFC), T. N. Ukwatta (MSU) (i.e. the Swift-BAT team):
Using the data set from T-60 to T+243 sec from the recent telemetry downlink, we report further analysis of BAT GRB 140305A (trigger #590446) (Maselli, et al., GCN Circ. 15929). The BAT ground-calculated position is RA, Dec = 344.497, 15.448 deg which is
```
  RA(J2000)  =  22h 57m 59.4s 
  Dec(J2000) = +15d 26' 53.3" 
```
with an uncertainty of 1.7 arcmin, (radius, sys+stat, 90% containment). The partial coding was 48%.
The mask-weighted light curve shows a FRED-like peak starting at T-1 sec, peaking at T sec, and ending at T+20 sec. T90 (15-350 keV) is 13.7 +- 1.8 sec (estimated error including systematics).
The time-averaged spectrum from T-1.1 to T+16.3 sec is best fit by a power law with an exponential cutoff. This fit gives a photon index 0.32 +- 0.92, and Epeak of 70 +- 32 keV (chi squared 45.13 for 56 d.o.f.). For this model the total fluence in the 15-150 keV band is 4.7 +- 0.7 x 10^-7 erg/cm2 and the 1-sec peak flux measured from T+0.18 sec in the 15-150 keV band is 1.0 +- 0.2 ph/cm2/sec. A fit to a simple power law gives a photon index of 1.49 +- 0.17 (chi squared 51.59 for 57 d.o.f.). 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/590446/BA/

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Jochen Greiner, last update: 06-Mar-2014 [Disclaimer]