{
  "bibcode": "2013GCN.15614....1G",
  "body": "E. Gorbovskoy, D.Denisenko, V. Lipunov, V.Kornilov, D.Kuvshinov, \nA.Belinski, N.Tyurina, N.Shatskiy, P.Balanutsa, D.Zimnukhov, A.Kuznetsov,\nV.V.Chazov, A.Sankovich\nSternberg Astronomical Institute, Moscow State University\n\nA. Tlatov, A.V. Parhomenko, D. Dormidontov, V.Sennik\nKislovodsk Solar Station of the Pulkovo Observatory\n\nV.Yurkov, Yu.Sergienko, D.Varda, E.Sinyakov\nBlagoveschensk Educational State University, Blagoveschensk\n\nK.Ivanov, S.Yazev, N.M.Budnev, O.Gres, O.Chuvalaev, V.A.Poleshchuk\nIrkutsk State University\n\nV.Krushinski, I.Zalozhnih,  A. Popov\nUral Federal University, Kourovka\n\nHugo Levato and Carlos Saffe\nInstituto de Ciencias Astronomicas, de la Tierra y del Espacio (ICATE)\n\nClaudio Mallamaci, Carlos Lopez and Federico Podest\nObservatorio Astronomico Felix Aguilar (OAFA)\n\n\nMASTER II  robotic telescope (MASTER-Net: http://observ.pereplet.ru) \nlocated in Kislovodsk was pointed to the  GRB131225A 6 hours after trigger \ntime at 2013-12-25 15:53:40 UT.\nWe cover full MAXI error box (A. Kawagoe et al GCN 15609) using MASTER II \ntwin telescope in parallel mode with FOV 4 sq. degrees.\nObservations were made in the extremely  rich field (with galactic \nlatitude b=-4 deg).\nThe  5-sigma upper limit has been about 19.0 mag on our first (180s \nexposure) image. On coadd of first 19 images with total exposure 3420 sec \nand middle time 2013-12-25 16:30:25 UT the  5-sigma upper limit has been \n20.5 mag.\n\nInside MAXI field of view we have detected two objects not present in\nUSNO-B1.0 catalog with the following coordinates and unfiltered\nmagnitudes:\n\nID #1191735: 06 19 43.71 +04 47 37.6  (20.13m)\nID #1191736: 06 17 51.08 +04 57 19.8  (20.26m)\n\nWe have identified both objects with the red stars on the digitized\nPalomar IR plates, as well as in WISE and UKIDSS catalogs.\n\nWISE J061943.55+044738.8 (W1=14.33 W2=14.14)\nUGPS J061943.55+044739.1 (J=15.42 H=14.88 K=14.47)\n\nWISE J061751.09+045719.6 (W1=15.79 W2=15.46)\nUGPS J061751.05+045719.7 (J=18.24 H=17.40 K=17.17)\n\nAlso, in error box we found 2 known minor planets (Groom and 2004 OZ). The \ntotal number of known asteroids in our FOV is 11. There is no new minor \nplanet found in error box.\n\nThe combined optical image is available here\nhttp://master.sai.msu.ru/static/GRB/GRB131225A_MAXI/GRB131225A.jpeg\n\nThe message may be cited.",
  "circularId": 15614,
  "createdOn": 1388075355000,
  "email": "gcncirc@observ.inetcomm.ru",
  "subject": "GRB 131225A: MASTER-Net optical observations",
  "submitter": "Vladimir Lipunov at Moscow State U/Krylov Obs  <gcncirc@observ.inetcomm.ru>",
  "eventId": "GRB 131225A"
}