Gamma-ray Burst 021104

(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 04 Nov 02 07:01:08 UT 
NOTICE_TYPE:    HETE S/C_Alert 
TRIGGER_NUM:    2434,   Seq_Num: 1
GRB_DATE:       12582 TJD;   308 DOY;   02/11/04
GRB_TIME:       25262.94 SOD {07:01:02.94} UT
TRIGGER_SOURCE: Trigger on the 6-120 keV band.
GAMMA_RATE:     376  [cnts/s]  on a 1.300 [sec] timescale
SC_LONG:        184 [deg East] 
SUN_POSTN:      219.25d {+14h 37m 00s}  -15.34d {-15d 20' 22"}
MOON_POSTN:     212.35d {+14h 09m 25s}   -9.92d {-09d 55' 03"}
MOON_ILLUM:     1 [%]
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 04 Nov 02 09:47:15 UT 
NOTICE_TYPE:    HETE Ground Analysis
TRIGGER_NUM:    2434,   Seq_Num: 3
GRB_DATE:       12582 TJD;   308 DOY;   02/11/04
GRB_TIME:       25262.93 SOD {07:01:02.93} UT
TRIGGER_SOURCE: Trigger on the 6-120 keV band.
GAMMA_RATE:     376  [cnts/s]  on a 1.300 [sec] timescale
SC_-Z_RA:        36 [deg]      
SC_-Z_DEC:       14 [deg]
SC_LONG:        184 [deg East] 
WXM_CNTR_RA:     58.452d {+03h 53m 48s} (J2000), 
                 58.499d {+03h 53m 60s} (current),
                 57.627d {+03h 50m 31s} (1950)
WXM_CNTR_DEC:   +37.953d {+37d 57' 12"} (J2000),
                +37.962d {+37d 57' 41"} (current),
                +37.806d {+37d 48' 21"} (1950)
WXM_CORNER1:     58.1680  38.3240 [deg]
WXM_CORNER2:     58.6860  38.2860 [deg]
WXM_CORNER3:     58.7340  37.5830 [deg]
WXM_CORNER4:     58.2190  37.6200 [deg] 
WXM_MAX_SIZE:   51.90 [arcmin] diameter   
WXM_LOC_SN:     5 sig/noise (pt src in image)
WXM_IMAGE_SN:   X= 3.8 Y= 4.1 [sig/noise]
WXM_LC_SN:      X= 4.4 Y= 3.2 [sig/noise]
SUN_POSTN:      219.25d {+14h 37m 00s}  -15.34d {-15d 20' 22"}
SUN_DIST:       151.71 [deg]
MOON_POSTN:     212.35d {+14h 09m 25s}   -9.92d {-09d 55' 03"}
MOON_DIST:      143.43 [deg]   
MOON_ILLUM:     1 [%]
GAL_COORDS:     158.12,-12.16 [deg] galactic lon,lat of the burst
ECL_COORDS:     64.40,17.28 [deg] ecliptic lon,lat of the burst
COMMENTS:       Probable GRB.
COMMENTS:       Burst_Validity flag is true.  
COMMENTS:       WXM data refined since S/C_Last Notice.

GCN notice #1668
Weidong Li, R. Chornock, S. Jha, and A. V. Filippenko (UCB) report:
"We have observed the localization of GRB021104 (HETE Trigger #2434) with the Katzman Automatic Imaging Telescope (KAIT) for several images (with exposure time 20s to 300s unfiltered) starting at 3 Nov 2002 09:47 UT, about 167 minutes after the trigger. Inspection of the images reveals a new object that is not present in DSS II red image of the region. The coordinates of the object are:
RA 03:53:47.89 +37:54:28.2 (J2000)
The magnitude of the object is about 19.9. We suggest that this object is the possible afterglow of GRB020813."
GCN notice #1669
D.W. Fox and P.A. Price (Caltech) report on behalf of a larger collaboration:
We note that the candidate optical afterglow reported by Li et al. (GCN #1668) is visible on the DSS 2 N-emulsion plate. Hence we do not consider it a likely candidate for the afterglow of the GRB.
This message may be cited.
GCN notice #1670
Weidong Li, R. Chornock, S. Jha, and A. V. Filippenko (UCB) report:
"Analyses of the images of the GRB021104 field taken by KAIT from 4 Nov 2002 09:47 UT to 11:18 UT showed that the possible afterglow reported in GCN #1668 did not vary in brightness, thus confirmed the finding by Fox and Price in GCN #1669.
Corrigendum: in GCN #1668, the observation time should be "4 Nov 2002", also, the last sentence 'GRB020813' should be 'GRB021104'. Thanks to Jean-Luc Atteia of LAOMP, Observatoire Midi-Pyrenees (France) for the quick alert to these mistakes."
GCN notice #1671
D.W. Fox and P.A. Price (Caltech) report:
"We have observed the full WXM error box of the GRB021104 (HETE #2434) with the Oschin 48-inch telescope + unfiltered NEAT camera, with our first observations occurring at 09:49 UT, 2:48 after the burst. Visual comparison of our earliest individual exposures with archival (DSS-2) images reveals several asteroids but no new stationary objects within the error box.
Image-differencing analysis of the summed image from two sets of (3x120s) triplet exposures, the first with mean epoch 10:12 UT and the second with mean epoch 12:37 UT, also fails to reveal any variable sources that are not present in archival images.
We estimate the limiting R-band magnitude of each of these two unfiltered searches to be R >~ 21 mag."
GCN notice #1675
T. Tamagawa, Y. Shirasaki, C. Graziani, M. Matsuoka, K. Torii, T. Sakamoto, A. Yoshida, E. Fenimore, M. Galassi, T. Tavenner, T. Donaghy, Y. Nakagawa, D. Takahashi, M. Suzuki, R. Satoh, and Y. Urata, on behalf of the HETE WXM Team;
G. Ricker, J-L Atteia, N. Kawai, D. Lamb, and S. Woosley on behalf of the HETE Science Team;
N. Butler, G. Crew, J. Doty, G. Prigozhin, R. Vanderspek, J. Villasenor, T. Cline, J. G. Jernigan, A. Levine, F. Martel, E. Morgan, 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;
write:
At 07:01:02.93 UTC (25262.93 s UT) on 4 Nov 2002, the HETE FREGATE and WXM instruments detected event H2434, a long, X-ray-rich GRB.
Ground analysis of the WXM data for the burst produced a location, which was reported in a GCN Position Notice at 9:47 UT, 166 minutes after the burst. The WXM localization SNR was 5. The WXM location can be expressed as a 90% confidence rectangle that is approximately 24 arcminutes in width and 42 arcminutes in length. The corners of the rectangle lie at the following J2000 coordinates:
```
RA = 3h 52m 40.3s, Dec = 38o 19' 26"
RA = 3h 54m 44.6s, Dec = 38o 17' 10"
RA = 3h 54m 56.2s, Dec = 37o 34' 59"
RA = 3h 52m 52.6s, Dec = 37o 37' 12".
```
The burst duration in the 8-40 keV band was ~26s. A total of 2120 counts were detected during that interval, corresponding to a fluence of ~4 x 10-7 ergs cm-2 . The peak flux was >3 x 10-8 ergs cm-2 s-1 (i.e., >1 x Crab flux).
A light curve for GRB021104 is provided at the following URL:
http://space.mit.edu/HETE/Bursts/GRB021104/
This message is citable.
GCN notice #1677
M. Bradshaw, G. Williams (Steward Observatory), D. Hartmann (Clemson University) and H.S. Park report on behalf of the Super-LOTIS collaboration:
Starting on Nov 4.456 UT the Super-LOTIS automated telescope imaged the entire error box for GRB021104 (GCNC #1675; HETE trigger #2434) in the R-band. Observations started 3.93 hours after the burst. A total of 57 images at 60 second integration were analyzed. We find no optical transients to the DSS limit in the coadded image. We also coadded three sets of 19 images and find no fading sources which are not present in the DSS.
This report may be cited.
GCN notice #1724
Julie McEnery on behalf of the Milagro collaboration reports:
Milagro searched for GeV/TeV gamma-ray emission from GRB 021104 (GCN 1675), GRB 021112 (GCN 1682) and GRB 021113 (GCN 1686) during the burst durations reported by the HETE WXM (26, 5 and 20 seconds respectively). No evidence for prompt GeV/TeV emission was found from any of these bursts. A preliminary analysis (assuming a differential photon spectral index of -2.4) gives an upper limit on the fluence at the 99.9% confidence level of:
```
J(E 0.2-20 TeV) < 3.4 * 10^(-6) erg cm^(-2) for GRB 021104 and,
J(E 0.2-20 TeV) < 2.6 * 10^(-6) erg cm^(-2) for GRB 021112 and,
J(E 0.2-20 TeV) < 2.8 * 10^(-6) erg cm^(-2) for GRB 021113
```

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Jochen Greiner, last update: 6-Dec-2002 [Disclaimer]