{
  "bibcode": "2016GCN.20075....1S",
  "body": "V.A.Sadovnichy,\nLomonosov Moscow State University\n\nM.I.Panasyuk,  S.I.Svertilov, A.V.Bogomolov, \nV.V.Bogomolov, N.L.Dzhioeva, A.M.Amelushkin, V.O.Barinova, A.F.Iyudin, \nV.V.Kalegaev, D.Nguen,  V.L. Petrov, I.V.Yashin, P.S.Kazarian\nPhysics Department, Skobel`tsyn Institute of Nuclear Physics, Moscow State\n\nV. Lipunov, E.S. Gorbovskoy, N.Tyurina, D.Kuvshinov, M.Panchenko, \nA.Kuznetsov, V.G.Kornilov, P. Balanutsa, E.Popova \nLomonosov Moscow State University, Sternberg Astronomical Institute\n\nV.Yurkov, A.Gabovich, Yu.Sergienko \nBlagoveschensk Educational State University, Blagoveschensk\n\nN.M.Budnev, K.Ivanov, O.Gres, O.Chuvalaev, V.A.Poleshchuk, S.Yazev\nIrkutsk State University\n\nR. Rebolo, M. Serra, N. Lodieu, G. Israelian, L. Suarez-Andres\nThe Instituto de Astrofisica de Canarias\n\nI. Park, J. Lee, S. Jeong\nDepartment of Physics, Sungkyunkwan University, Seobu-ro, Jangangu, Suwonsi, \nKorea\n\nAt 17:52:17 UT on 17 Sep 2016, the Lomonosov BDRG  Gamma-ray Burst\nMonitor  (http://lomonosov.sinp.msu.ru/en/scientific-equipment-2/bdrg )\ntriggered GRB 161017A (E. Troja et al.,, GCN 20064).\nGRB 161017A has several peaks LC, total duration ~100s,the energy range\n70-300 keV.\n\nThe light curve is available at\nhttp://master.sai.msu.ru/static/Lomonosov/GRB161017A_BDRG2.png\n\nMore information will be available at:\nhttp://lomonosov.sinp.msu.ru/category/results/observation-gamma-ray-bursts\n\nMASTER-Amur  robotic telescope (MASTER-Net: http://observ.pereplet.ru) \nlocated in Blagoveschensk was pointed to the  GRB161017A 21 sec after \nnotice time and 47 sec after Swift trigger time at 2016-10-17 17:52:38 UT \nin two polarizations. \nOn  our first (10s exposure)  set we  marginally found  optical transient \nat  Yurkov et al. (GCN 20063) and Troja et al. (GCN 20064) position.\nThe 5-sigma upper limit has been about 14.5 mag .\nThe OT was became brighter up to maximum at 3-4  set .\n\nThe observations made on zenit distance = 53 degrees, galaxy latitude b = \n47 degree.\nThe moon (96 % bright part) is 50 degrees above the horizon. The distance \nbetween  moon and  object is 87\nThe sun  altitude  is -37.8 degree.\n\n\nMASTER-Tunka  robotic telescope (MASTER-Net: http://observ.pereplet.ru) \nlocated in Tunka (Baykal lake) was pointed to the  GRB161017.74 75 sec \nafter notice time \nand 103 sec after trigger time at 2016-10-17 17:53:34 UT. On our second \n(20s exposure)  set we haven`t found optical transient  within SWIFT \nerror-box (ra=09 31 03 dec=+43 08 31 r=0.050000).\nThe 5-sigma upper limit has been about 12.5 mag.\n\nThe observations made on zenit distance = 65 degrees, galaxy latitude b = \n47 degree.\nThe moon (96 % bright part) is 50 degrees above the horizon. The distance \nbetween  moon and  object is 87 degrees.\nThe sun  altitude  is -45.9 degrees.\nThe low mahnitude limit because dense fog due to Irkut (Famost Sibirian \nriver) evaporation.\n\nWe imaged OT late.\n\nMASTER-IAC  robotic telescope (MASTER-Net: http://observ.pereplet.ru) \nlocated at Teide Observatory (Tenerife, Canary, Spain) was pointed to the \nGRB161017A  32942 sec after trigger time at 2016-10-18 03:00:53 UT. On our \nfirst (180s exposure)  set we found optical transient  on coaded images.\nThe 5-sigma upper limit has been about 17.8 mag\n\nThe observations made on zenit distance = 69 degrees, galaxy latitude b = \n47 degrees. The moon (94 % bright part) is 75 degrees above the horizon. \nThe distance  between  moon and  object is 82 degrees.\nThe sun  altitude  is -54.1 degree.\n\nOur preliminary photometry is next:\n\nTime     Tstart  Tmid Expt    Site      Filter  Mag   eMag Filter  Mag   eMag\n\n17:52:38    47    52   10   MASTER-Amur   P/   15.69   1.0  P\\   15.46   1.0\n17:53:07    71    76   10   MASTER-Amur   P/   14.05   0.3  P\\   13.99   0.3\n17:53:03    96   106   20   MASTER-Amur   P/   13.87   0.2  P\\   13.63   0.2\n17:54:03   131   146   30   MASTER-Amur   P/   13.90   0.3  P\\   13.80   0.3\n17:54:46   175   195   40   MASTER-Amur   P/   14.34   0.3  P\\   14.34   0.3\n17:55:41   229   254   50   MASTER-Amur   P/   15.03   0.4  P\\\n17:56:46   295   325   60   MASTER-Amur   P/   14.91   0.4  P\\   14.91   0.4\n17:58:12   381   540  240   MASTER-Amur   P/   15.88   0.4  P\\   16.03   0.4\n18:05:20   809   889  160   MASTER-Tunka  P|   15.64   0.2\n03:00:53 32942 33464  900   MASTER-IAC    C    18.62   0.2\n03:19:17 34046 34587  900   MASTER-IAC    C    18.60   0.2\n03:38:01 35170 35726  900   MASTER-IAC    C    18.62   0.2\n03:57:26 36335 36885  900   MASTER-IAC    C    18.68   0.2\n\nPreliminary OT light curve is available at\nhttp://master.sai.msu.ru/static/GRB161017A.png\n\n\nThe message may be cited.",
  "circularId": 20075,
  "createdOn": 1476807813000,
  "email": "lipunov@xray.sai.msu.ru",
  "subject": "GRB 161017A: Lomonosov Gamma Ray and MASTER Optical  prompt observations",
  "submitter": "Vladimir Lipunov at Moscow State U/Krylov Obs  <lipunov@xray.sai.msu.ru>",
  "eventId": "GRB 161017A"
}