GCN Circular 19884
Subject
GRB 160824B: Lomonosov BDRG gamma ray detection and MASTER limit
Date
2016-08-31T16:28:04Z (9 years ago)
From
Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>
N.L.Dzhioeva, A.M.Amelushkin, V.O.Barinova, A.V.Bogomolov, V.V.Bogomolov,
A.F.Iyudin, V.V.Kalegaev, M.I.Panasyuk, V.L. Petrov, S.I.Svertilov,
I.V.Yashin
Physics Department, Skobel`tsyn Institute of Nuclear Physics, Moscow State
University.
I. Park, J. Lee, S. Jeong
Department of Physics, Sungkyunkwan University, Seobu-ro, Jangangu, Suwonsi,
Korea
V. Lipunov, E.S. Gorbovskoy, N.Tyurina,
P.Balanutsa, A.Kuznetsov, D.Kuvshinov,
Lomonosov Moscow State University, Sternberg Astronomical Institute
K.Ivanov, S.Yazev, N.M.Budnev, O.Gres, O.Chuvalaev, V.A.Poleshchuk
Irkutsk State University
V.Yurkov, Yu.Sergienko, A.Gabovich
Blagoveschensk Educational State University, Blagoveschensk
Fermi GRB 160824B (Hamburg, GCN 19856; Yoshida et al., GCN 19873) was
observed by Lomonosov on 16/08/24 around Fermi/CALET trigger time.
It was visible by all 3 detectors of BDRG in energy range up to 1 MeV.
The parameters of GRB are:
Total duration ~3s.
Peak intensity in the range 20-1000 keV >6 photons/cm2*s in the range 20-1000 keV
Peak intensity in the range 250-1000 keV >2 photons/cm2*s
The Gamma Ray light curve is available at
http://master.sai.msu.ru/static/GRB160824B_Lomonosov_BDRG.png
MASTER II robotic telescope (MASTER-Net: http://observ.pereplet.ru)
located in Tunka was pointed to the GRB160824B (Hamburg et al, GCN
19856) 62 sec after notice time and 107 sec after trigger time at
2016-08-24 14:23:00 UT. On our first (20s exposure) set we found 56
optical transient within FERMI error-box (ra=08 21 12 dec=+46 14 00
r=3.833300) brighter then 15.83, but first alert have a too large
coordinate error and this region is outside final error box. We cover
part of final error box 619 sec after trigger time at 2016-08-24 14:31:32
UT by 3-th alert message. The 5-sigma upper limit has been about 18 mag on
120 s exposure image. No OT was found.
MASTER II robotic telescope located in Blagoveschensk was starded
inspect inside the GRB160824B (Hamburg et al, GCN 19856, Yoshida et al,
GCN 19873) error box 1165 sec after trigger time at 2016-08-24 14:40:38
UT. We cover full 1 sigma + 3 degree systematic error box with 5-sigma
upper limit about 18 mag.
No OT was found.
The cover map is available at
http://master.sai.msu.ru/static/GRB160824B_MASTER_Cover.png .
The message may be cited.