GRB 041224
GCN Circular 2908
Subject
GRB041224: Swift-BAT detection of a soft burst
Date
2004-12-24T22:48:18Z (20 years ago)
From
Scott Barthelmy at NASA/GSFC <Scott@lheamail.gsfc.nasa.gov>
S. Barthelmy (GSFC), C. Markwardt (GSFC/UMD), T. Sakamoto (),
L. Barbier, J. Cummings (GSFC), E. Fenimore (LANL), N. Gehrels (GSFC),
D. Hullinger (GSFC/UMD), S. Hunsberger (PSU), H. Krimm (GSFC/USRA),
K. McLean, D. Palmer (LANL), A. Parsons (GSFC), G. Sato (ISAS),
M. Still (GSFC/USRA), M. Suzuki (Saitama), G. Tagliaferri (OAB) J. Tueller,
on behalf of the Swift-BAT team:
At 20:20:57 UT, the Swift Burst Alert Telescope (BAT) triggered and
located on-board GRB041224. The spacecraft did not autonomously slew
to the burst since automated slewing was not yet enabled.
The BAT ground-calculated location is RA,Dec 56.200,-6.656 (J2000)
with an uncertainty of 7 arcmin (radius, 3-sigma, including our
preliminary bore sight alignment correction). This is 40 degrees off
the BAT bore sight (33% partially encoded). The lightcurve is
multi-peaked with a total duration of ~50 sec in the 15-350 keV band.
The burst is soft with a power-law photon index of ~1.7-1.8.
GCN Circular 2911
Subject
GRB 041224: near-infrared observations with REM
Date
2004-12-25T02:55:34Z (20 years ago)
From
Daniele Malesani at SISSA-ISAS,Trieste,Italy <malesani@sissa.it>
P. D'Avanzo, S. Covino, D. Malesani, F.M. Zerbi, G. Chincarini, G.
Tagliaferri, E. Molinari, V. Testa, G. Tosti, A. Monfardini, A. Di
Paola, M. Rodono', L.A. Antonelli, P. Conconi, G. Cutispoto, L.
Nicastro, E. Palazzi, on behalf of the REM/ROSS team, report:
We imaged the field of GRB041224 (Barthelmy et al., GCN 2908) with the
60cm REM robotic telescope located in La Silla (Chile). Observations
were carried out in the J, H and K filters, while the bright and close
Moon (<40 deg away) prevented observations in the optical.
Only the central 10'x10' region of BAT error circle was imaged
(approximately 60%), under good seeing conditions (1"), starting on 2004
Dec 25, at 1:06 UT, and ending at 1:39 UT (approximately 5 hours after
the burst).
Visual inspection of the NIR frames didn't reveal any new object when
compared with the 2MASS catalog. Our frames are deeper than this survey,
therefore further observations are in progress to search for variable
sources.
This message can be cited.
GCN Circular 2912
Subject
GRB041224: ROTSE-III Optical Observations
Date
2004-12-25T03:32:43Z (20 years ago)
From
Eli Rykoff at Univ. of Michigan/ROTSE <erykoff@umich.edu>
E. Rykoff, T. McKay, H. Swan (U. Michigan) report on behalf of the ROTSE
collaboration:
ROTSE-IIIc, located at the H.E.S.S. sit at Mt. Gamsberg, Namibia,
responded to Swift GRB041224 (GCN#2908). A manual response was
initiated at 23:20:41 UT, 3 hours after the burst. We took 10 5-s
exposures followed by 250 20-s exposures. All the images were taken
with >95% moon illumination. The unfiltered images were calibrated
relative to USNO A2.0. Individual images have limiting magnitudes
around 17.2. Comparison to DSS (second epoch) reveals no new sources
within the 3-sigma error circle to a limiting magnitude of 18.5 for
stacks of 10 images taken during the first hour of observation.
GCN Circular 2961
Subject
GRB 041224 and GRB 041226: BOOTES-2 simultaneous observations
Date
2005-01-18T19:01:22Z (20 years ago)
Edited On
2024-11-18T09:51:17Z (6 months ago)
From
Alberto Castro-Tirado at Inst.de Astro. de Andalucia <ajct@iaa.es>
Edited By
Judith Racusin at NASA/GSFC <judith.racusin@nasa.gov> on behalf of Leo P. Singer at NASA/GSFC <leo.p.singer@nasa.gov>
A. J. Castro-Tirado, M. Jelínek, A. de Ugarte Postigo,
(IAA-CSIC Granada), S. Vitek (Czech Technical University,
Prague), P. Kubanek (Astronomical Institute of the Academy
of Sciences, Ondrejov), T. J. Mateo Sanguino (Universidad
de Huelva), J. M. Castro Cerón (U. Copenhagen), T. Soria
(EELM-CSIC, Málaga) and J. Fabregat (Universidad de Valencia)
report:
The BOOTES-2 very wide field camera, located at the Estación
Experimental de La Mayora (EELM-CSIC) in Málaga, observed
the two regions of the sky containing the SWIFT/BAT error
boxes for GRB 041224 (Barthelmy et al. GCN 2908) and GRB
041226 (Krimm et al. GCN 2914) as part of its routine
observing schedule. For GRB 041224 a 30 s exposure started
at 20:21:00 UT (3 s after the onset of the 50 s long burst),
with the following frame starting at 20:22:00 UT. For GRB
041226 the 30 s exposure started at 20:34:00 (19 s prior to
the onset of the 20 s main emission peak). Limiting (unfiltered)
magnitudes of 8.5 and 7.0 respectively (due to the presence
of the full moon) are derived for any promt optical flash
arising from either of these two events.
This message can be quoted.