Gamma-ray Burst 040319

(All information courtesy of the instrument teams.)

Previous IAU Circulars

none

Results of Observations

GCN/HETE POSITION NOTICE

 
TITLE:          GCN/HETE BURST POSITION NOTICE
NOTICE_DATE:    Fri 19 Mar 04 07:46:02 UT
NOTICE_TYPE:    HETE S/C_Alert 
TRIGGER_NUM:    3128,   Seq_Num: 1
GRB_DATE:       13083 TJD;    79 DOY;   04/03/19
GRB_TIME:       27960.57 SOD {07:46:00.57} UT
TRIGGER_SOURCE: Trigger on the 6-80 keV band.
GAMMA_RATE:     531  [cnts/s]  on a 0.160 [sec] timescale
SC_LONG:        206 [deg East] 
SUN_POSTN:      359.13d {+23h 56m 31s}   -0.38d {-00d 22' 38"}
MOON_POSTN:     342.44d {+22h 49m 46s}  -12.35d {-12d 20' 42"}
MOON_ILLUM:     3 [%]
COMMENTS:       No s/c ACS pointing info available yet.
COMMENTS:       Probable GRB.

GCN/HETE POSITION NOTICE

 
TITLE:          GCN/HETE BURST POSITION NOTICE
NOTICE_DATE:    Fri 19 Mar 04 07:57:47 UT
NOTICE_TYPE:    HETE S/C_Last  
TRIGGER_NUM:    3128,   Seq_Num: 2
GRB_DATE:       13083 TJD;    79 DOY;   04/03/19
GRB_TIME:       27960.57 SOD {07:46:00.57} UT
TRIGGER_SOURCE: Trigger on the 6-80 keV band.
GAMMA_RATE:     531  [cnts/s]  on a 0.160 [sec] timescale
SC_-Z_RA:       179 [deg]
SC_-Z_DEC:        0 [deg]
SC_LONG:        206 [deg East]
WXM_CNTR_RA:    160.471d {+10h 41m 53s} (J2000),
                160.529d {+10h 42m 07s} (current),
                159.778d {+10h 39m 07s} (1950)
WXM_CNTR_DEC:   +28.894d {+28d 53' 38"} (J2000),
                +28.872d {+28d 52' 18"} (current),
                +29.156d {+29d 09' 21"} (1950)
WXM_MAX_SIZE:   60.00 [arcmin] diameter
WXM_LOC_SN:     3 sig/noise (pt src in image)
WXM_IMAGE_SN:   X= 3.7 Y= 1.2 [sig/noise]
WXM_LC_SN:      X= 6.7 Y= 2.5 [sig/noise]
SUN_POSTN:      359.13d {+23h 56m 31s}   -0.38d {-00d 22' 38"}
SUN_DIST:       146.42 [deg]
MOON_POSTN:     342.44d {+22h 49m 46s}  -12.35d {-12d 20' 42"}
MOON_DIST:      163.38 [deg]  
MOON_ILLUM:     3 [%]
GAL_COORDS:     201.73,61.44 [deg] galactic lon,lat of the burst
ECL_COORDS:     150.82,19.08 [deg] ecliptic lon,lat of the burst
COMMENTS:       Probable GRB.
COMMENTS:       WXM error box is circular; not rectangular.

GCN/BACODINE POSITION NOTICE

TITLE:          GCN/HETE BURST POSITION NOTICE
NOTICE_DATE:    Fri 19 Mar 04 09:41:13 UT
NOTICE_TYPE:    HETE Ground Analysis
TRIGGER_NUM:    3128,   Seq_Num: 3
GRB_DATE:       13083 TJD;    79 DOY;   04/03/19
GRB_TIME:       27960.57 SOD {07:46:00.57} UT
TRIGGER_SOURCE: Trigger on the 6-80 keV band.
GAMMA_RATE:     531  [cnts/s]  on a 0.160 [sec] timescale
SC_-Z_RA:       179 [deg]
SC_-Z_DEC:        0 [deg]
SC_LONG:        206 [deg East] 
SUN_POSTN:      359.13d {+23h 56m 31s}   -0.38d {-00d 22' 38"}
MOON_POSTN:     342.44d {+22h 49m 46s}  -12.35d {-12d 20' 42"}
MOON_ILLUM:     3 [%]
COMMENTS:       Possible GRB.
COMMENTS:       There is no position known for this trigger at this time.
COMMENTS:       Burst_Validity flag is true.
COMMENTS:       WXM data refined since S/C_Last Notice.
COMMENTS:       Invalid localization by flight code.

GCN/BACODINE POSITION NOTICE

TITLE:          GCN/HETE BURST POSITION NOTICE
NOTICE_DATE:    Fri 19 Mar 04 09:54:44 UT
NOTICE_TYPE:    HETE Ground Analysis
TRIGGER_NUM:    3128,   Seq_Num: 4
GRB_DATE:       13083 TJD;    79 DOY;   04/03/19
GRB_TIME:       27960.57 SOD {07:46:00.57} UT
TRIGGER_SOURCE: Trigger on the 6-80 keV band.
GAMMA_RATE:     531  [cnts/s]  on a 0.160 [sec] timescale
SC_-Z_RA:       179 [deg]
SC_-Z_DEC:        0 [deg]
SC_LONG:        206 [deg East] 
WXM_CNTR_RA:    160.772d {+10h 43m 05s} (J2000),
                160.822d {+10h 43m 17s} (current),
                160.175d {+10h 40m 42s} (1950)
WXM_CNTR_DEC:   -25.622d {-25d 37' 18"} (J2000),
                -25.644d {-25d 38' 38"} (current),
                -25.360d {-25d 21' 33"} (1950)
WXM_CORNER1:    161.0890 -32.9240 [deg]
WXM_CORNER2:    160.4840 -32.8280 [deg]
WXM_CORNER3:    160.4530 -18.3359 [deg]
WXM_CORNER4:    161.0600 -18.4000 [deg] 
WXM_MAX_SIZE:   873.57 [arcmin] diameter 
WXM_LOC_SN:     11 sig/noise (pt src in image)
WXM_IMAGE_SN:   X= 2.4 Y= 1.2 [sig/noise]
WXM_LC_SN:      X= 9.6 Y= 3.7 [sig/noise]
SUN_POSTN:      359.13d {+23h 56m 31s}   -0.38d {-00d 22' 38"}
SUN_DIST:       148.54 [deg]
MOON_POSTN:     342.44d {+22h 49m 46s}  -12.35d {-12d 20' 42"}
MOON_DIST:      141.98 [deg]
MOON_ILLUM:     3 [%]
GAL_COORDS:     269.78,28.86 [deg] galactic lon,lat of the burst
ECL_COORDS:     173.27,-30.99 [deg] ecliptic lon,lat of the burst
COMMENTS:       Definite GRB.
COMMENTS:       Burst_Validity flag is true.  
COMMENTS:       WXM data refined since S/C_Last Notice.
COMMENTS:       Invalid localization by flight code.

GCN/BACODINE POSITION NOTICE

TITLE:          GCN/HETE BURST POSITION NOTICE
NOTICE_DATE:    Fri 19 Mar 04 21:15:53 UT
NOTICE_TYPE:    HETE Ground Analysis
TRIGGER_NUM:    3128,   Seq_Num: 5
GRB_DATE:       13083 TJD;    79 DOY;   04/03/19
GRB_TIME:       27960.57 SOD {07:46:00.57} UT
TRIGGER_SOURCE: Trigger on the 6-80 keV band.
GAMMA_RATE:     531  [cnts/s]  on a 0.160 [sec] timescale
SC_-Z_RA:       179 [deg]
SC_-Z_DEC:        0 [deg]
SC_LONG:        206 [deg East] 
WXM_CNTR_RA:    160.563d {+10h 42m 15s} (J2000),
                160.614d {+10h 42m 27s} (current),
                159.964d {+10h 39m 51s} (1950)
WXM_CNTR_DEC:   -23.810d {-23d 48' 34"} (J2000),
                -23.832d {-23d 49' 54"} (current),
                -23.548d {-23d 32' 51"} (1950)
WXM_CORNER1:    160.2730 -19.6110 [deg]
WXM_CORNER2:    160.2720 -27.9330 [deg]
WXM_CORNER3:    160.8530 -28.0180 [deg]
WXM_CORNER4:    160.8550 -19.6770 [deg] 
WXM_MAX_SIZE:   504.95 [arcmin] diameter 
WXM_LOC_SN:     3 sig/noise (pt src in image)
WXM_IMAGE_SN:   X= 2.4 Y= 1.2 [sig/noise]
WXM_LC_SN:      X= 9.6 Y= 3.7 [sig/noise]
SXC_CNTR_RA:    160.403d {+10h 41m 37s} (J2000),
                160.454d {+10h 41m 49s} (current),
                159.804d {+10h 39m 13s} (1950)
SXC_CNTR_DEC:   -23.789d {-23d 47' 19"} (J2000),
                -23.811d {-23d 48' 39"} (current),
                -23.527d {-23d 31' 37"} (1950)
SXC_CORNER1:    160.3770 -19.6230 [deg] 
SXC_CORNER2:    160.3820 -27.9490 [deg] 
SXC_CORNER3:    160.4300 -27.9560 [deg] 
SXC_CORNER4:    160.4240 -19.6280 [deg]
SXC_MAX_SIZE:   499.53 [arcmin] diameter
SXC_LOC_SN:     3 sig/noise (pt src in image) 
SUN_POSTN:      359.13d {+23h 56m 31s}   -0.38d {-00d 22' 38"}
SUN_DIST:       149.77 [deg]
MOON_POSTN:     342.44d {+22h 49m 46s}  -12.35d {-12d 20' 42"}
MOON_DIST:      143.79 [deg]
MOON_ILLUM:     3 [%]
GAL_COORDS:     268.30,30.21 [deg] galactic lon,lat of the burst
ECL_COORDS:     172.00,-29.48 [deg] ecliptic lon,lat of the burst
COMMENTS:       Definite GRB.
COMMENTS:       Burst_Validity flag is true.
COMMENTS:       WXM data refined since S/C_Last Notice.
COMMENTS:       SXC data refined since S/C_Last Notice.

GCN notice #2554
R. Sato, G. Ricker, J-L. Atteia, N. Kawai, D. Lamb, and S. Woosley, on behalf of the HETE Science Team;
T. Donaghy, E. Fenimore, M. Galassi, C. Graziani, M. Matsuoka, Y. Nakagawa, T. Sakamoto, Y. Shirasaki, M. Suzuki, T. Tamagawa, K. Torii, Y. Urata, T. Yamazaki, Y. Yamamoto, and A. Yoshida, on behalf of the HETE WXM Team;
R. Vanderspek, N. Butler, G. Crew, J. Doty, A. Dullighan, G. Prigozhin, J. Villasenor, J. G. Jernigan, A. Levine, G. Azzibrouck, J. Braga, R. Manchanda, and G. Pizzichini, on behalf of the HETE Operations and HETE Optical-SXC Teams;
M. Boer, J-F Olive, J-P Dezalay, C. Barraud, and K. Hurley, on behalf of the HETE FREGATE Team;
report:
At 07:46:00.57 UTC (27960.57s UT) on 19 March 2004, the HETE-2 FREGATE, WXM, and SXC instruments detected event H3128, a long GRB.
The burst triggered FREGATE in the 6-80 keV energy band; the time history SNR was 23.3 and T90 is 7.4s. A WXM flight localization was disseminated, but was incorrect due to the low SNR of the burst in the WXM YA-detector. The WXM flight localization was retracted in a GCN Notice at 09:41:13 UT. Ground analysis of the WXM data produced a preliminary localization that was reported in a GCN Notice at 09:54:44 UT. Further ground analysis of the WXM data produced a refined localization that was reported in a GCN Notice at 21:15:53 UT. The refined WXM ground localization SNR was 4.2 in the X-detector and 2.3 in the Y-detector. The refined WXM localization can be expressed as a 90% confidence rectangle whose center is at
WXM-ground: RA = +10h 42m 15s, Dec = -23d 48' 34" (J2000),
and whose corners lie at
```
WXM-ground: RA =  +10h 41m 05.5s, Dec = -19d 36' 40"
            RA =  +10h 41m 05.3s, Dec = -27d 55' 59"
            RA =  +10h 43m 24.7s, Dec = -28d 01' 05"
            RA =  +10h 43m 25.2s, Dec = -19d 40' 37" (J2000).
```
Ground analysis of the SXC data produced a 1-dimensional SXC localization that was also reported in the GCN Notice at 21:15:53 UT. The SXC ground localization SNR was 3 in the X-camera. The SXC 1-dimensional X-camera localization, truncated by the WXM Y-detector localization, can be expressed as a 90% confidence rectangle, whose center is at
SXC/WXM-ground: RA = +10h 41m 37s, Dec = -23d 47' 19" (J2000),
and whose corners lie at
```
SXC/WXM-ground: RA = +10h 41m 30.5s, Dec = -19d 37' 23"
                RA = +10h 41m 31.7s, Dec = -27d 56' 56"
                RA = +10h 41m 43.2s, Dec = -27d 57' 22"
                RA = +10h 41m 41.8s, Dec = -19d 37' 41" (J2000).
```
The width and the length of the rectangle are 2.6 arcminutes and 8.3 degrees, respectively, and the area of the rectangle is 1290 square arcminutes.
The fluence of the burst is 0.56 x 10-6 erg cm-2 in the 2-30 keV energy band and 1.1 x 10-6 erg cm-2 in the 30-400 keV energy band. Thus S(2-30 keV)/S(30-400 keV) = 0.5, making this burst an X-ray-rich GRB.
A light curve and skymaps for GRB 040319 are provided at the following URL:
http://space.mit.edu/HETE/Bursts/GRB040319

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Jochen Greiner, last update: 25-Mar-2004 [Disclaimer]