GCN Circular 20075
Subject
GRB 161017A: Lomonosov Gamma Ray and MASTER Optical prompt observations
Date
2016-10-18T16:23:33Z (8 years ago)
From
Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>
V.A.Sadovnichy,
Lomonosov Moscow State University
M.I.Panasyuk, S.I.Svertilov, A.V.Bogomolov,
V.V.Bogomolov, N.L.Dzhioeva, A.M.Amelushkin, V.O.Barinova, A.F.Iyudin,
V.V.Kalegaev, D.Nguen, V.L. Petrov, I.V.Yashin, P.S.Kazarian
Physics Department, Skobel`tsyn Institute of Nuclear Physics, Moscow State
V. Lipunov, E.S. Gorbovskoy, N.Tyurina, D.Kuvshinov, M.Panchenko,
A.Kuznetsov, V.G.Kornilov, P. Balanutsa, E.Popova
Lomonosov Moscow State University, Sternberg Astronomical Institute
V.Yurkov, A.Gabovich, Yu.Sergienko
Blagoveschensk Educational State University, Blagoveschensk
N.M.Budnev, K.Ivanov, O.Gres, O.Chuvalaev, V.A.Poleshchuk, S.Yazev
Irkutsk State University
R. Rebolo, M. Serra, N. Lodieu, G. Israelian, L. Suarez-Andres
The Instituto de Astrofisica de Canarias
I. Park, J. Lee, S. Jeong
Department of Physics, Sungkyunkwan University, Seobu-ro, Jangangu, Suwonsi,
Korea
At 17:52:17 UT on 17 Sep 2016, the Lomonosov BDRG Gamma-ray Burst
Monitor (http://lomonosov.sinp.msu.ru/en/scientific-equipment-2/bdrg )
triggered GRB 161017A (E. Troja et al.,, GCN 20064).
GRB 161017A has several peaks LC, total duration ~100s,the energy range
70-300 keV.
The light curve is available at
http://master.sai.msu.ru/static/Lomonosov/GRB161017A_BDRG2.png
More information will be available at:
http://lomonosov.sinp.msu.ru/category/results/observation-gamma-ray-bursts
MASTER-Amur robotic telescope (MASTER-Net: http://observ.pereplet.ru)
located in Blagoveschensk was pointed to the GRB161017A 21 sec after
notice time and 47 sec after Swift trigger time at 2016-10-17 17:52:38 UT
in two polarizations.
On our first (10s exposure) set we marginally found optical transient
at Yurkov et al. (GCN 20063) and Troja et al. (GCN 20064) position.
The 5-sigma upper limit has been about 14.5 mag .
The OT was became brighter up to maximum at 3-4 set .
The observations made on zenit distance = 53 degrees, galaxy latitude b =
47 degree.
The moon (96 % bright part) is 50 degrees above the horizon. The distance
between moon and object is 87
The sun altitude is -37.8 degree.
MASTER-Tunka robotic telescope (MASTER-Net: http://observ.pereplet.ru)
located in Tunka (Baykal lake) was pointed to the GRB161017.74 75 sec
after notice time
and 103 sec after trigger time at 2016-10-17 17:53:34 UT. On our second
(20s exposure) set we haven`t found optical transient within SWIFT
error-box (ra=09 31 03 dec=+43 08 31 r=0.050000).
The 5-sigma upper limit has been about 12.5 mag.
The observations made on zenit distance = 65 degrees, galaxy latitude b =
47 degree.
The moon (96 % bright part) is 50 degrees above the horizon. The distance
between moon and object is 87 degrees.
The sun altitude is -45.9 degrees.
The low mahnitude limit because dense fog due to Irkut (Famost Sibirian
river) evaporation.
We imaged OT late.
MASTER-IAC robotic telescope (MASTER-Net: http://observ.pereplet.ru)
located at Teide Observatory (Tenerife, Canary, Spain) was pointed to the
GRB161017A 32942 sec after trigger time at 2016-10-18 03:00:53 UT. On our
first (180s exposure) set we found optical transient on coaded images.
The 5-sigma upper limit has been about 17.8 mag
The observations made on zenit distance = 69 degrees, galaxy latitude b =
47 degrees. The moon (94 % bright part) is 75 degrees above the horizon.
The distance between moon and object is 82 degrees.
The sun altitude is -54.1 degree.
Our preliminary photometry is next:
Time Tstart Tmid Expt Site Filter Mag eMag Filter Mag eMag
17:52:38 47 52 10 MASTER-Amur P/ 15.69 1.0 P\ 15.46 1.0
17:53:07 71 76 10 MASTER-Amur P/ 14.05 0.3 P\ 13.99 0.3
17:53:03 96 106 20 MASTER-Amur P/ 13.87 0.2 P\ 13.63 0.2
17:54:03 131 146 30 MASTER-Amur P/ 13.90 0.3 P\ 13.80 0.3
17:54:46 175 195 40 MASTER-Amur P/ 14.34 0.3 P\ 14.34 0.3
17:55:41 229 254 50 MASTER-Amur P/ 15.03 0.4 P\
17:56:46 295 325 60 MASTER-Amur P/ 14.91 0.4 P\ 14.91 0.4
17:58:12 381 540 240 MASTER-Amur P/ 15.88 0.4 P\ 16.03 0.4
18:05:20 809 889 160 MASTER-Tunka P| 15.64 0.2
03:00:53 32942 33464 900 MASTER-IAC C 18.62 0.2
03:19:17 34046 34587 900 MASTER-IAC C 18.60 0.2
03:38:01 35170 35726 900 MASTER-IAC C 18.62 0.2
03:57:26 36335 36885 900 MASTER-IAC C 18.68 0.2
Preliminary OT light curve is available at
http://master.sai.msu.ru/static/GRB161017A.png
The message may be cited.
