GRB 021104
GCN Circular 1668
Subject
GRB021104: possible optical afterglow
Date
2002-11-04T11:00:27Z (23 years ago)
From
Weidong Li at UC Berkeley KAIT/LOSS <weidong@astron.berkeley.edu>
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 Circular 1669
Subject
GRB021104: Candidate present in DSS
Date
2002-11-04T11:16:47Z (23 years ago)
From
Paul Price at RSAA, ANU at CIT <pap@srl.caltech.edu>
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 Circular 1670
Subject
GRB021104: optical observations
Date
2002-11-04T11:53:14Z (23 years ago)
From
Weidong Li at UC Berkeley KAIT/LOSS <weidong@astron.berkeley.edu>
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 Circular 1671
Subject
GRB021104: Optical observations
Date
2002-11-04T14:46:54Z (23 years ago)
From
Derek Fox at CIT <derekfox@astro.caltech.edu>
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 Circular 1675
Subject
GRB021104(=H2434): A Long, X-Ray-Rich GRB Localized by HETE
Date
2002-11-05T03:59:54Z (23 years ago)
From
Don Lamb at U.Chicago <lamb@oddjob.uchicago.edu>
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 Circular 1676
Subject
IPN triangulation of GRB021104 (annulus)
Date
2002-11-06T00:34:34Z (23 years ago)
From
Kevin Hurley at UCBerkeley/SSL <khurley@sunspot.ssl.berkeley.edu>
K. Hurley and T. Cline, on behalf of the Ulysses and HETE teams, and
G. Ricker, J-L Atteia, N. Kawai, D. Lamb, S. Woosley, J. Doty, R.
Vanderspek, J. Villasenor, G. Crew, G. Monnelly, N. Butler, J.G.
Jernigan, A. Levine, F. Martel, E. Morgan, G. Prigozhin, J. Braga, R.
Manchanda, G. Pizzichini, Y. Shirasaki, C. Graziani, M. Matsuoka, T.
Tamagawa, K. Torii, T. Sakamoto, A. Yoshida, E. Fenimore, M. Galassi,
T. Tavenner, T. Donaghy, M. Boer, J-F Olive, and J-P Dezalay, on behalf
of the HETE GRB team, report:
Ulysses and HETE-FREGATE (H2436) observed this GRB at 32792 seconds. As
observed by Ulysses, it had a duration of approximately 10 seconds and
a 25-100 keV fluence of approximately 1.0E-06 erg/cm2.
We have triangulated it to a preliminary annulus centered at RA,
Decl(2000) = 0.042, -35.331 degrees, whose radius is 84.393 +/- 0.083
degrees (3 sigma ).
This annulus may be constrained and/or improved, but as the event was
not observed by Mars Odyssey, a small error box cannot be derived for
it.
GCN Circular 1677
Subject
GRB021104: Optical Observations
Date
2002-11-06T23:37:49Z (23 years ago)
From
Michael Bradshaw at SuperLOTIS <mbradshaw@as.arizona.edu>
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 Circular 1724
Subject
GRB 021104, GRB 021112 and GRB 021113 - Milagro GeV/TeV Observations
Date
2002-12-06T18:41:04Z (22 years ago)
From
Julie McEnery at UMBC/GSFC <mcenery@milkyway.gsfc.nasa.gov>
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