Gamma-ray Burst 040802

(All information courtesy of the instrument teams.)

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Results of Observations

GCN/BACODINE POSITION NOTICE

TITLE:          GCN/HETE BURST POSITION NOTICE
NOTICE_DATE:    Mon 02 Aug 04 18:02:24 UT
NOTICE_TYPE:    HETE S/C_Alert
TRIGGER_NUM:    3485,   Seq_Num: 1
GRB_DATE:       13219 TJD;   215 DOY;   04/08/02
GRB_TIME:       64941.03 SOD {18:02:21.03} UT
TRIGGER_SOURCE: Trigger on the 25-400 keV band.
GAMMA_RATE:     193  [cnts/s]  on a 0.160 [sec] timescale
SC_LONG:         72 [deg East]
SUN_POSTN:      133.22d {+08h 52m 53s}  +17.53d {+17d 31' 60"}
MOON_POSTN:     341.26d {+22h 45m 02s}  -12.51d {-12d 30' 28"}
MOON_ILLUM:     95 [%]
COMMENTS:       No s/c ACS pointing info available yet.
COMMENTS:       Probable GRB.

GCN/BACODINE POSITION NOTICE

TITLE:          GCN/HETE BURST POSITION NOTICE
NOTICE_DATE:    Mon 02 Aug 04 18:04:20 UT
NOTICE_TYPE:    HETE S/C_Update
TRIGGER_NUM:    3485,   Seq_Num: 2
GRB_DATE:       13219 TJD;   215 DOY;   04/08/02
GRB_TIME:       64941.03 SOD {18:02:21.03} UT
TRIGGER_SOURCE: Trigger on the 25-400 keV band.
GAMMA_RATE:     193  [cnts/s]  on a 0.160 [sec] timescale
SC_-Z_RA:       291 [deg]
SC_-Z_DEC:      -10 [deg]
SC_LONG:         72 [deg East]
WXM_CNTR_RA:    288.680d {+19h 14m 43s} (J2000),
                288.734d {+19h 14m 56s} (current),
                288.090d {+19h 12m 22s} (1950)
WXM_CNTR_DEC:   +10.835d {+10d 50' 07"} (J2000),
                +10.843d {+10d 50' 37"} (current),
                +10.747d {+10d 44' 51"} (1950)
WXM_MAX_SIZE:   60.00 [arcmin] diameter
WXM_LOC_SN:     4 sig/noise (pt src in image)
WXM_IMAGE_SN:   X= 4.0 Y= 2.7 [sig/noise]
WXM_LC_SN:      X= 5.7 Y= 4.5 [sig/noise]
SUN_POSTN:      133.22d {+08h 52m 53s}  +17.53d {+17d 31' 60"}
SUN_DIST:       142.71 [deg]
MOON_POSTN:     341.26d {+22h 45m 02s}  -12.51d {-12d 30' 28"}
MOON_DIST:       57.14 [deg]
MOON_ILLUM:     95 [%]
GAL_COORDS:     45.21,-0.17 [deg] galactic lon,lat of the burst
ECL_COORDS:     291.99,32.86 [deg] ecliptic lon,lat of the burst
COMMENTS:       Possible GRB.
COMMENTS:       Probable XRB.
COMMENTS:       WXM error box is circular; not rectangular.
COMMENTS:       This position matches a known X-ray source.

GCN/BACODINE POSITION NOTICE

TITLE:          GCN/HETE BURST POSITION NOTICE
NOTICE_DATE:    Mon 02 Aug 04 18:04:35 UT
NOTICE_TYPE:    HETE S/C_Update
TRIGGER_NUM:    3485,   Seq_Num: 3
GRB_DATE:       13219 TJD;   215 DOY;   04/08/02
GRB_TIME:       64941.03 SOD {18:02:21.03} UT
TRIGGER_SOURCE: Trigger on the 25-400 keV band.
GAMMA_RATE:     193  [cnts/s]  on a 0.160 [sec] timescale
SC_-Z_RA:       291 [deg]
SC_-Z_DEC:      -10 [deg]
SC_LONG:         72 [deg East]
WXM_CNTR_RA:    288.680d {+19h 14m 43s} (J2000),
                288.734d {+19h 14m 56s} (current),
                288.090d {+19h 12m 22s} (1950)
WXM_CNTR_DEC:   +10.835d {+10d 50' 07"} (J2000),
                +10.843d {+10d 50' 37"} (current),
                +10.747d {+10d 44' 51"} (1950)
WXM_MAX_SIZE:   60.00 [arcmin] diameter
WXM_LOC_SN:     4 sig/noise (pt src in image)
WXM_IMAGE_SN:   X= 4.0 Y= 2.5 [sig/noise]
WXM_LC_SN:      X= 5.7 Y= 4.5 [sig/noise]
SUN_POSTN:      133.22d {+08h 52m 53s}  +17.53d {+17d 31' 60"}
SUN_DIST:       142.71 [deg]
MOON_POSTN:     341.26d {+22h 45m 02s}  -12.51d {-12d 30' 28"}
MOON_DIST:       57.14 [deg]
MOON_ILLUM:     95 [%]
GAL_COORDS:     45.21,-0.17 [deg] galactic lon,lat of the burst
ECL_COORDS:     291.99,32.86 [deg] ecliptic lon,lat of the burst
COMMENTS:       Possible GRB.
COMMENTS:       Probable XRB.
COMMENTS:       WXM error box is circular; not rectangular.
COMMENTS:       This position matches a known X-ray source.

GCN/BACODINE POSITION NOTICE

TITLE:          GCN/HETE BURST POSITION NOTICE
NOTICE_DATE:    Mon 02 Aug 04 18:06:36 UT
NOTICE_TYPE:    HETE S/C_Update
TRIGGER_NUM:    3485,   Seq_Num: 4
GRB_DATE:       13219 TJD;   215 DOY;   04/08/02
GRB_TIME:       64941.03 SOD {18:02:21.03} UT
TRIGGER_SOURCE: Trigger on the 25-400 keV band.
GAMMA_RATE:     193  [cnts/s]  on a 0.160 [sec] timescale
SC_-Z_RA:       291 [deg]
SC_-Z_DEC:      -10 [deg]
SC_LONG:         72 [deg East]
WXM_CNTR_RA:    291.738d {+19h 26m 57s} (J2000),
                291.789d {+19h 27m 09s} (current),
                291.189d {+19h 24m 45s} (1950)
WXM_CNTR_DEC:   +19.420d {+19d 25' 11"} (J2000),
                +19.429d {+19d 25' 45"} (current),
                +19.318d {+19d 19' 05"} (1950)
WXM_MAX_SIZE:   60.00 [arcmin] diameter
WXM_LOC_SN:     4 sig/noise (pt src in image)
WXM_IMAGE_SN:   X= 3.7 Y= 2.0 [sig/noise]
WXM_LC_SN:      X= 5.7 Y= 2.0 [sig/noise]
SUN_POSTN:      133.22d {+08h 52m 53s}  +17.53d {+17d 31' 60"}
SUN_DIST:       137.46 [deg]
MOON_POSTN:     341.26d {+22h 45m 02s}  -12.51d {-12d 30' 28"}
MOON_DIST:       58.25 [deg]
MOON_ILLUM:     95 [%]
GAL_COORDS:     54.18,1.26 [deg] galactic lon,lat of the burst
ECL_COORDS:     297.48,40.81 [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:    Mon 02 Aug 04 18:08:07 UT
NOTICE_TYPE:    HETE S/C_Last
TRIGGER_NUM:    3485,   Seq_Num: 5
GRB_DATE:       13219 TJD;   215 DOY;   04/08/02
GRB_TIME:       64941.03 SOD {18:02:21.03} UT
TRIGGER_SOURCE: Trigger on the 25-400 keV band.
GAMMA_RATE:     193  [cnts/s]  on a 0.160 [sec] timescale
SC_-Z_RA:       291 [deg]
SC_-Z_DEC:      -10 [deg]
SC_LONG:         72 [deg East]
WXM_CNTR_RA:    291.738d {+19h 26m 57s} (J2000),
                291.789d {+19h 27m 09s} (current),
                291.189d {+19h 24m 45s} (1950)
WXM_CNTR_DEC:   +19.420d {+19d 25' 11"} (J2000),
                +19.429d {+19d 25' 45"} (current),
                +19.318d {+19d 19' 05"} (1950)
WXM_MAX_SIZE:   60.00 [arcmin] diameter
WXM_LOC_SN:     4 sig/noise (pt src in image)
WXM_IMAGE_SN:   X= 3.7 Y= 2.0 [sig/noise]
WXM_LC_SN:      X= 5.7 Y= 2.0 [sig/noise]
SUN_POSTN:      133.22d {+08h 52m 53s}  +17.53d {+17d 31' 60"}
SUN_DIST:       137.46 [deg]
MOON_POSTN:     341.26d {+22h 45m 02s}  -12.51d {-12d 30' 28"}
MOON_DIST:       58.25 [deg]
MOON_ILLUM:     95 [%]
GAL_COORDS:     54.18,1.26 [deg] galactic lon,lat of the burst
ECL_COORDS:     297.48,40.81 [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:    Mon 02 Aug 04 18:22:26 UT
NOTICE_TYPE:    HETE Ground Analysis
TRIGGER_NUM:    3485,   Seq_Num: 6
GRB_DATE:       13219 TJD;   215 DOY;   04/08/02
GRB_TIME:       64941.03 SOD {18:02:21.03} UT
TRIGGER_SOURCE: Trigger on the 25-400 keV band.
GAMMA_RATE:     193  [cnts/s]  on a 0.160 [sec] timescale
SC_-Z_RA:       290 [deg]
SC_-Z_DEC:      -10 [deg]
SC_LONG:         72 [deg East]
SUN_POSTN:      133.22d {+08h 52m 53s}  +17.53d {+17d 31' 60"}
MOON_POSTN:     341.26d {+22h 45m 02s}  -12.51d {-12d 30' 28"}
MOON_ILLUM:     95 [%]
COMMENTS:       Definitely not a GRB.
COMMENTS:       This position matches a known X-ray source.
COMMENTS:       There is no position known for this trigger at this time.
COMMENTS:       Burst_Invalidity flag is true.

GCN/BACODINE POSITION NOTICE

TITLE:          GCN/HETE BURST POSITION NOTICE
NOTICE_DATE:    Tue 03 Aug 04 11:30:53 UT
NOTICE_TYPE:    HETE Ground Analysis
TRIGGER_NUM:    3485,   Seq_Num: 7
GRB_DATE:       13219 TJD;   215 DOY;   04/08/02
GRB_TIME:       64941.03 SOD {18:02:21.03} UT
TRIGGER_SOURCE: Trigger on the 25-400 keV band.
GAMMA_RATE:     193  [cnts/s]  on a 0.160 [sec] timescale
SC_-Z_RA:       289 [deg]
SC_-Z_DEC:      -10 [deg]
SC_LONG:         72 [deg East]
WXM_CNTR_RA:    279.200d {+18h 36m 48s} (J2000),
                279.288d {+18h 37m 09s} (current),
                278.247d {+18h 32m 59s} (1950)
WXM_CNTR_DEC:   -48.605d {-48d 36' 19"} (J2000),
                -48.601d {-48d 36' 04"} (current),
                -48.648d {-48d 38' 51"} (1950)
WXM_CORNER1:    276.5150 -52.7410 [deg]
WXM_CORNER2:    276.1540 -52.6390 [deg]
WXM_CORNER3:    281.8860 -44.4720 [deg]
WXM_CORNER4:    282.2460 -44.5700 [deg]
WXM_MAX_SIZE:   540.10 [arcmin] diameter
WXM_LOC_SN:     5 sig/noise (pt src in image)
WXM_IMAGE_SN:   X= 5.7 Y= 2.0 [sig/noise]
WXM_LC_SN:      X= 5.1 Y= 0.0 [sig/noise]
SUN_POSTN:      133.22d {+08h 52m 53s}  +17.53d {+17d 31' 60"}
SUN_DIST:       138.52 [deg]
MOON_POSTN:     341.26d {+22h 45m 02s}  -12.51d {-12d 30' 28"}
MOON_DIST:       62.24 [deg]
MOON_ILLUM:     95 [%]
GAL_COORDS:     346.78,-17.73 [deg] galactic lon,lat of the burst
ECL_COORDS:     276.72,-25.38 [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.

GCN/BACODINE POSITION NOTICE

TITLE:          GCN/HETE BURST POSITION NOTICE
NOTICE_DATE:    Wed 04 Aug 04 17:18:58 UT
NOTICE_TYPE:    HETE Ground Analysis
TRIGGER_NUM:    3485,   Seq_Num: 8
GRB_DATE:       13219 TJD;   215 DOY;   04/08/02
GRB_TIME:       64941.03 SOD {18:02:21.03} UT
TRIGGER_SOURCE: Trigger on the 25-400 keV band.
GAMMA_RATE:     193  [cnts/s]  on a 0.160 [sec] timescale
SC_-Z_RA:       288 [deg]
SC_-Z_DEC:      -10 [deg]
SC_LONG:         72 [deg East]
WXM_CNTR_RA:    281.849d {+18h 47m 24s} (J2000),
                281.932d {+18h 47m 44s} (current),
                280.940d {+18h 43m 46s} (1950)
WXM_CNTR_DEC:   -44.489d {-44d 29' 20"} (J2000),
                -44.484d {-44d 29' 01"} (current),
                -44.544d {-44d 32' 38"} (1950)
WXM_CORNER1:    279.2950 -49.1440 [deg]
WXM_CORNER2:    278.9330 -49.0439 [deg]
WXM_CORNER3:    284.4049 -39.8360 [deg]
WXM_CORNER4:    284.7620 -39.9330 [deg]
WXM_MAX_SIZE:   599.68 [arcmin] diameter
WXM_LOC_SN:     5 sig/noise (pt src in image)
WXM_IMAGE_SN:   X= 5.7 Y= 2.0 [sig/noise]
WXM_LC_SN:      X= 5.1 Y= 0.0 [sig/noise]
SUN_POSTN:      133.22d {+08h 52m 53s}  +17.53d {+17d 31' 60"}
SUN_DIST:       142.42 [deg]
MOON_POSTN:     341.26d {+22h 45m 02s}  -12.51d {-12d 30' 28"}
MOON_DIST:       59.53 [deg]
MOON_ILLUM:     95 [%]
GAL_COORDS:     351.51,-17.96 [deg] galactic lon,lat of the burst
ECL_COORDS:     279.05,-21.42 [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.

GCN notice #2637
K. Hurley and T. Cline, on behalf of the Ulysses, HETE, Mars Odyssey, and Konus GRB teams,
I. Mitrofanov, S. Charyshnikov, V. Grinkov, A. Kozyrev, M. Litvak, and A. Sanin, on behalf of the HEND-Odyssey GRB team,
W. Boynton, C. Fellows, K. Harshman, C. Shinohara and R. Starr, on behalf of the GRS-Odyssey GRB team,
E. Mazets and S. Golenetskii, on behalf of the Konus-Wind GRB team,
G. Ricker, J-L Atteia, N. Kawai, D. Lamb, S. Woosley, J. Doty, R. Vanderspek, J. Villasenor, G. Crew, N. Butler, J.G. Jernigan, F. Martel, G. Prigozhin, A. Dullighan, J. Braga, R. Manchanda, G. Pizzichini, Y. Shirasaki, C. Graziani, M. Matsuoka, T. Tamagawa, T. Sakamoto, A. Yoshida, E. Fenimore, M. Galassi, T. Donaghy, C. Barraud, M. Boer, J-F Olive, and J-P Dezalay, on behalf of the HETE GRB team, and
A. von Kienlin, G. Lichti, and A. Rau, on behalf of the INTEGRAL SPI-ACS GRB team, report:
On 2004 August 02, HETE (FREGATE and WXM), Mars Odyssey (HEND), Konus-Wind, and INTEGRAL (SPI-ACS) detected H3485, a 2.9 s long (T90) gamma-ray burst. Ulysses was off. The Earth-crossing time was 64901.03 s. The HETE localization was sent out in a series of 8 GCN notices. Triangulation using the IPN spacecraft resulted in an annulus centered at RA, Decl (2000)= 327.8358, -14.1907 degrees, whose radius is 47.7170 +/- 0.0315 degrees (3 sigma). This annulus intersects the WXM error box given in GCN Notice Sequence 8 to form an ~80 square arcminute error box whose corners are at
```
RA(2000)    Decl(2000)
282.997     -42.516781
283.043     -42.433411
283.208     -42.884371
283.253     -42.801818
```
The fluences in the 7-30, 30-400, and 2-30 keV ranges were 0.49, 2.04, and 0.56 x 10^-6 erg/cm^2. The ratio of the X-ray to gamma-ray fluences was ~0.24, making this a classical GRB. The pseudo-redshift was 1.7.
HETE detected this burst during a flare from GRS1915+105, making the localization unusually difficult. We apologize for any confusion.
astro-ph/0605570 from 22 May 2006
Donaghy: HETE-2 Localizations and Observations of Four Short Gamma-Ray Bursts: GRBs 010326B, 040802, 051211 and 060121
Here we report the localizations and properties of four short-duration GRBs localized by the High Energy Transient Explorer 2 satellite (HETE-2): GRBs 010326B, 040802, 051211 and 060121, all of which were detected by the French Gamma Telescope (Fregate) and localized with the Wide-field X-ray Monitor (WXM) and/or Soft X-ray Camera (SXC) instruments. We discuss eight possible criteria for determining whether these GRBs are "short population bursts" (SPBs) or "long population bursts" (LPBs). These criteria are (1) duration, (2) pulse widths, (3) spectral hardness, (4) spectral lag, (5) energy Egamma radiated in gamma rays (or equivalently, the kinetic energy E_KE of the GRB jet), (6) existence of a long, soft bump following the burst, (7) location of the burst in the host galaxy, and (8) type of host galaxy. In particular, we have developed a likelihood method for determining the probability that a burst is an SPB or a LPB on the basis of its T90 duration alone. A striking feature of the resulting probability distribution is that the T90 duration at which a burst has an equal probability of being a SPB or a LPB is T90 = 5 s, not T90 = 2 s, as is often used. All four short-duration bursts discussed in detail in this paper have T90 durations in the Fregate 30-400 keV energy band of 1.90, 2.31, 4.25, and 1.97 sec, respectively, yielding probabilities P(S|T90) = 0.97, 0.91, 0.60, and 0.95 that these bursts are SPBs on the basis of their T90 durations alone. All four bursts also have spectral lags consistent with zero. These results provide strong evidence that all four GRBs are SPBs.

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Jochen Greiner, last update: 29-May-2006 [Disclaimer]