GRB 180824A
GCN Circular 23174
Subject
IPN Triangulation of GRB 180824A (short)
Date
2018-08-25T16:37:39Z (7 years ago)
From
Dmitry Svinkin at Ioffe Institute <svinkin@mail.ioffe.ru>
D. Svinkin, S. Golenetskii, R. Aptekar, D. Frederiks, A. Kozlova,
and T. Cline on behalf of the Konus-Wind team,
K. Hurley, on behalf of the IPN,
A. von Kienlin, X. Zhang, A. Rau, V. Savchenko, E. Bozzo,
and C. Ferrigno, on behalf of the INTEGRAL SPI-ACS GRB team,
and
S. Barthelmy, J. Cummings, H. Krimm, and D. Palmer,
on behalf of the Swift-BAT team, report:
The short-duration GRB 180824A was detected by
Konus-Wind, INTEGRAL (SPI-ACS), and Swift (BAT),
at about 36319 s UT (10:05:19).
The burst was outside the coded field of view of the BAT.
We have triangulated it to a preliminary, 3 sigma error box
whose coordinates are:
---------------------------------------------
RA(2000), deg Dec(2000), deg
---------------------------------------------
Center:
10.060 (00h 40m 14s) +56.619 (+56d 37' 09")
Corners:
357.831 (23h 51m 19s) +60.118 (+60d 07' 04")
6.353 (00h 25m 25s) +58.199 (+58d 11' 58")
18.977 (01h 15m 55s) +52.272 (+52d 16' 18")
13.317 (00h 53m 16s) +54.952 (+54d 57' 07")
---------------------------------------------
The error box area is 3.30 sq. deg, and its maximum
dimension is 14.0 deg (the minimum one is 20.76 arcmin).
The Sun distance was 105 deg.
This box may be improved.
A triangulation map is posted at
http://www.ioffe.ru/LEA/GRBs/GRB180824_T36319/IPN/
The time history and spectrum will be given in forthcoming
GCN Circulars.
GCN Circular 23176
Subject
GRB 180824A: MASTER inspection IPN short GRB error box
Date
2018-08-26T07:28:28Z (7 years ago)
From
Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>
V. Lipunov, E. Gorbovskoy, D. Vlasenko, N.Tiurina,
V.Kornilov, A.Kuznetsov, V.Chazov, I. Gorbunov,
D.Zimnukhov, D.Kuvshinov, P.Balanutsa, V.Vladimirov,
Lomonosov Moscow State University,SAI
A. Tlatov, V.Senik, D. Dormidontov
Kislovodsk Solar Station of the Pulkovo Observatory
D.Svinkin (Ioffe Institute, Sankt Petersburg)
D. Buckley,
South African Astronomical Observatory (SAAO)
R. Rebolo, M. Serra, N. Lodieu, G. Israelian, L. Suarez-Andres
The Instituto de Astrofisica de Canarias (IAC)
R. Podesta, F. Podesta, C. Lopez, C.Francile
Observatorio Astronomico Felix Aguilar (OAFA)
H.Levato,
Instituto de Ciencias Astronomicas, de la Tierra y del Espacio (ICATE)
O. Gres, N.M.Budnev , Yu.Ishmuhametova
Irkutsk State University (ISU)
A. Gabovich, V. Yurkov, Yu. Sergienko
Blagoveschensk Educational State University (BSPU)
MASTER-Kislovodsk robotic telescope (MASTER-Net:
http://observ.pereplet.ru)
located in Kislovodsk Solar Station of the Pulkovo Observatory was
starting survey on the IPN
GRB180824A error-box (Svinkin et al., GCN #23174) 274 sec after
notice time and 35665 sec after trigger time at 2018-08-24 19:59:44 UT.
The 5-sigma upper limit on our first (180s exposure) set is about 18.9
mag .
The galacitc latitude b = 0 deg.
The observations made on zenit distance = 36 deg.The moon (97 % bright
part) is 29 deg. above the horizon. The distance between moon and object
is 87
The sun altitude is -32.9 deg.
The object can be observed till sunrise at 2018-08-25 02:23:27
There are several bright galaxy (d < 100 Mpc) in IPN error box:
Galaxy name | center | b_mag | dist
-----------------------+-----------------------+--------+---------
PGC089890 | (15.7675d , 54.0347d) | 14.178 | 88.7359
2MASS00061177+5916507 | (1.54907d , 59.2808d) | 14.559 | 81.8258
2MASS00095357+5859451 | (2.47322d , 58.9959d) | 14.733 | 32.3946
2MASS00035040+5929552 | (0.96001d , 59.4987d) | 15.373 | 14.6266
The MASTER-Kislovodsk cover map is available at
http://www.pereplet.ru/lipunov/images/master_MAP_GRB180824A.jpg
There is no OT detetcted.
The message may be cited.
GCN Circular 23180
Subject
Konus-Wind observation of GRB 180824A
Date
2018-08-27T14:57:16Z (7 years ago)
From
Anastasia Tsvetkova at Ioffe Institute <tsvetkova@mail.ioffe.ru>
A. Tsvetkova, S. Golenetskii, R.Aptekar, D. Frederiks,
M. Ulanov, D. Svinkin, A. Lysenko, A. Kozlova and T. Cline
on behalf of the Konus-Wind team, report:
The short-duration GRB 180824A
(IPN triangulation: Svinkin et al., GCN 23174)
triggered Konus-Wind at T0=36319.887 s UT (10:05:19.887).
The burst light curve shows a double-peaked structure
with a total duration of ~2 s.
The emission is seen up to ~1.2 MeV.
As observed by Konus-Wind, the burst
had a fluence of 1.02(-0.34,+0.41)x10^-6 erg/cm2,
and a 64-ms peak energy flux, measured from T0+0.012 s,
of 7.15(-3.46,+4.02)x10^-6 erg/cm2/s
(both in the 20 keV - 10 MeV energy range).
The time-integrated spectrum of the main pulse
(measured from T0 to T0+0.256 s)
is best fit in the 20 keV - 16 MeV range
by a power law with exponential cutoff model:
dN/dE ~ (E^alpha)*exp(-E*(2+alpha)/Ep)
with�� alpha = -0.04(-0.85,+1.65),
and Ep = 375(-128,+267) keV (chi2 = 16/18 dof).
The Konus-Wind light curve of this GRB is available at
http://www.ioffe.ru/LEA/GRBs/GRB180824_T36319/
All the quoted errors are at the 90% confidence level.
All the quoted values are preliminary.