GRB 131224A
GCN Circular 15607
Subject
GRB 131224A: A short GRB detected by INTEGRAL
Date
2013-12-24T18:17:19Z (11 years ago)
From
Sandro Mereghetti at IASF/CNR <sandro@iasf-milano.inaf.it>
S.Mereghetti (IASF-Milano), D.Gotz (CEA, Saclay), E.Bozzo, C.Ferrigno,
D.Malishev (ISDC, Versoix), and J.Borkowski (CAMK, Torun) on behalf of the
IBAS Localization Team report:
a short gamma ray burst lasting about 0.8 s has been detected by IBAS in the
IBIS/ISGRI data at 16:54:37 UT of 24 December.
The refined coordinates (J2000) are:
R.A.= 296.8337 deg
DEC.= +31.6677 deg
with an uncertainty of 2 arcmin (90% c.l.).
The burst had a peak flux of about 1 counts/cm2/s (20-200 keV, 0.1-s
integration time) and a fluence in the same energy range of about 3x10e-8
erg/cmq.
A plot of the light curve will be posted at
http://ibas.iasf-milano.inaf.it/IBAS_Results.html
GCN Circular 15608
Subject
GRB 131224A: MASTER-Net early optical observations
Date
2013-12-25T08:14:39Z (11 years ago)
From
Vladimir Lipunov at Moscow State U/Krylov Obs <gcncirc@observ.inetcomm.ru>
E. Gorbovskoy, V. Lipunov, V.Kornilov, D.Kuvshinov, A.Belinski, N.Tyurina,
N.Shatskiy, P.Balanutsa, D.Zimnukhov, A.Kuznetsov, V.V.Chazov,
D.Denisenko, A.Sankovich
Sternberg Astronomical Institute, Moscow State University
A. Tlatov, A.V. Parhomenko, D. Dormidontov, V.Sennik
Kislovodsk Solar Station of the Pulkovo Observatory
V.Yurkov, Yu.Sergienko, D.Varda, E.Sinyakov
Blagoveschensk Educational State University, Blagoveschensk
K.Ivanov, S.Yazev, N.M.Budnev, O.Gres, O.Chuvalaev, V.A.Poleshchuk
Irkutsk State University
V.Krushinski, I.Zalozhnih, A. Popov
Ural Federal University, Kourovka
Hugo Levato and Carlos Saffe
Instituto de Ciencias Astronomicas, de la Tierra y del Espacio (ICATE)
Claudio Mallamaci, Carlos Lopez and Federico Podest
Observatorio Astronomico Felix Aguilar (OAFA)
MASTER II robotic telescope (MASTER-Net: http://observ.pereplet.ru)
located in Kislovodsk was pointed to the GRB131224A 33 sec after notice
time and 39 sec after trigger time at 2013-12-24 16:55:24 UT in two
polarizations.
Observations were made on high (z=75 deg) zenith distance and on the
extremely stars rich field (with galactic latitude b=3 deg).
On our first (10s exposure) set we haven`t found optical transient within
INTEGRAL error-box (S.Mereghetti et. al. GCN 15607).
The 5-sigma upper limit has been about 15.5 mag
The message may be cited.
GCN Circular 15610
Subject
GRB 131224A: Swift-XRT observation
Date
2013-12-25T21:21:07Z (11 years ago)
From
Ben Gompertz at U.of Leicester <bpg6@leicester.ac.uk>
B.P Gompertz, K.L. Page (U. Leicester) and M. De Pasquale (UCL-MSSL)
report on behalf of the Swift-XRT team:
We report on Swift-XRT observations of the field of the INTEGRAL
discovered GRB 131224A (Mereghetti et al. GCN Circ 15607), starting 10.8
ks after the trigger.
XRT began observing the field on 2013-12-24 at 19:53:56 UT (10.8 ks after
trigger), with an exposure time of of 3.96 ks. No source is detected
within the INTEGRAL error circle. The 3-sigma upper limit on the count
rate is 3.5E-03 cts/s, which is 1.4E-13 erg cm^-2 s^-1 using a typical
flux conversion of 4E-11 erg cm^-2 count^-1.
This circular is an official product of the Swift-XRT team.
GCN Circular 15615
Subject
GRB 131224A: Swift/UVOT Upper Limits
Date
2013-12-26T17:44:22Z (11 years ago)
From
Alice Breeveld at MSSL-UCL <a.breeveld@ucl.ac.uk>
A. A. Breeveld (UCL-MSSL) and M. De Pasquale (UCL-MSSL)
report on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 131224A
10748 s after the INTEGRAL trigger (Mereghetti et al., GCN Circ. 15607).
The field is very crowded and no optical afterglow consistent with the
INTEGRAL position is detected in the initial UVOT exposures. Preliminary
3-sigma upper limits using the UVOT photometric system (Breeveld et al.
2011, AIP Conf. Proc. 1358, 373) for the initial exposures are:
Filter T_start(s) T_stop(s) Exp(s) Mag
u 10748 18662 3918 >21.1
The magnitudes in the table are not corrected for the strong Galactic
extinction due to the reddening of E(B-V) = 0.96 in the direction of the
burst (Schlegel et al. 1998).
GCN Circular 15626
Subject
GRB 131224A: 5.8 GHz VLA observations
Date
2013-12-27T23:35:41Z (11 years ago)
From
Wen-fai Fong at CFA <wfong@cfa.harvard.edu>
W. Fong, B. A. Zauderer and E. Berger (Harvard) report:
"We observed the field of the INTEGRAL short-duration GRB 131224A
(Mereghetti et al., GCN 15607) with the Karl G. Jansky Very Large Array
(VLA). We obtained two sets of 1-hour observations beginning on 2013 Dec
24.907 UT and 2013 Dec 26.971 UT (0.202 and 2.267 days post-burst,
respectively) at a mean frequency of 5.8 GHz. We find no evidence for
variability within the INTEGRAL error circle to a 3-sigma limit of 33
microJy at the time of the two observations.
We thank the VLA staff for quickly executing these observations."