{
  "bibcode": "2005GCN..4206....1L",
  "body": "V. Lipunov, V.Kornilov, D.Kuvshinov, N.Tyurina, A.Belinski, E.Gorbovskoy,\nA.Krylov, G.Borisov, A.Sankovich, G.Antipov, V.Vladimirov\n\nSternberg Astronomical Institute, Moscow Union 'Optic'\nMASTER  robotic system (http://observ.pereplet.ru) responded to \nGRB051103.4 (GRB_TIME is 2005-11-03 09:25:43.785, S. Golenetskii et  al., \nGCN4197) at several  minutes after GCN Circ4197 time (GCN4198).\nThe first image (6 square degrees) was at 2005-11-05 19:55:47 UT, 2 days \n10:30:03.215  after the GRB time.\nWe have  36  images with total exposition 1080 s between 19:55:47 - \n21:45:17 on 6 square degrees area. The robot not find\nOT-candidate in IPN error box.\nOur upper limit of the sum is about  18.5 m (the wether was not very \ngood).\n\nThe unfiltered images are calibrated \nrelative to USNO A2.0 (0.8 R + 0.2 B).\n\nThere are 4 galaxies overlaps and inside IPN error box (see image):\n\n   Name         Type   Coordinates (J2000)     Magnitude  Redchift  Diameter\n                                               B  MASTER            25isophot\n\nNGC3031 (M81)  Sab           -               7.8    -    0.000376   big\nNGC3034 (M82)  S?            -               9.2    -    0.000677   big\nPGC2719634     ?    09 51 32.25 +68 31 23.4 17.8  16.7      ?       16\".9\nPGC028505      E    09 53 10.17 +69 00 02.1   ?   14.8      ?        6\".0\n\n\nM81 as candidate  (S. Golenetskii et  al., GCN4197) for SGR host\ngalaxy is  high probable, but we note that\nerror box placed outside spiral arms region, where the progenitor of high \nmagnetized Neutron Star formated. However structure of the galaxy is \ndistorted by tidal intaractions. For example there is Ultraluminous X-ray source\nM81 X-9 (see Wang, 2002, http://arxiv.org/abs/astro-ph/0201230 ) on same \ndistance from M81 center (this source is not in error box and belong to \nhigh mass binary population). There is now known SN remnants in error \nbox  (see for example D.Matonick and R.Fessen, ApJ SS 112,49,1997 which \nnot investigated IPN error box region).\n\nWe stress on elliptical galaxy PGC028505.\nThis galaxy close to center of the IPN error box.\nThe distance to PGC028505 can be  estimated as about 80 Mpc.\nAssuming this burst originated from a source PGC028505,\nthe isotrpoic energy release of this GRB is ~2x10^49 erg.\nThis energy is about 1 order more than GRB050509b one associated with \nelliptical galaxy (Barthelmy et al., GCN3385).\nIn any case X-ray and optical observations (for search SNR) highly needed.\n\nThe sum JPG-image is  available at\nhttp://observ.pereplet.ru/images/GRB051103.4/sum36.jpg .\nThe IPN error box and galaxies are presented.\n\nThis work is supported by RFFI  04-02-16411 grant.\nThis message can be cited.\nMailto: lipunov@sai.msu.ru",
  "circularId": 4206,
  "createdOn": 1131374085000,
  "email": "gcncirc@observ.inetcomm.ru",
  "subject": "GRB051103: MASTER: OT limit and host galaxy candidates",
  "submitter": "Vladimir Lipunov at Moscow State U/Krylov Obs  <gcncirc@observ.inetcomm.ru>",
  "eventId": "GRB 051103"
}