{
  "bibcode": "2017GCN.20903....1T",
  "body": "N.V.Tyurina, V.M. Lipunov,  E.S. Gorbovskoy, A.S.Kuznetsov,\nP.Balanutsa, V.V.Vladimirov, V.V.Chazov, D.Kuvshinov\nLomonosov Moscow State University, Sternberg Astronomical Institute\n\nD.Buckley, S. Potter, A.Kniazev, M.Kotze,\nSouth African Astronomical Observatory\n\nR. Rebolo, M. Serra-Ricart, N. Lodieu, G. Israelian, L. Suarez-Andres\nThe Instituto de Astrofisica de Canarias\n\nK.Ivanov, O.Gress, N.M.Budnev, S.Yazev, O.Chuvalaev, V.A.Poleshchuk,\nIrkutsk State University\n\nA. Tlatov,  V.Senik, D. Dormidontov,\nKislovodsk Solar Station of the Pulkovo Observatory\n\nH. Levato, C. Saffe,\nInstituto de Ciencias Astronomicas, de la Tierra y del Espacio (ICATE)\n\nR. Podesta, C. Lopez,  F.Podest\nObservatorio Astronomico Felix Aguilar (OAFA)\n\nA.Gabovich, V.Yurkov, Yu.Sergienko\nBlagoveschensk Educational State University, Blagoveschensk\n\nMASTER Global Robotic Net was starting inspection of IceCube HESE neutrino \nalert  IceCube-170312A  (Blaufuss et al. GCN #20857: RA(2000)= 305.15 \n-26.61, Triggertime= 2017-03-12 13:49:39.83 UT)\non 2017-03-13 02:06:34UT at MASTER-SAAO (Object: Altitude: 20.35, Sun: \nAltitude: -30.72,Dist. to Moon: 123.282677, Moon disk: 0.997328)\nand on 2017-03-14 08:38:51UT at MASTER-OAFA (Object: Altitude: 27.61, Sun: \nAltitude: -25.02,Dist. to Moon: 107.465652, Moon disk: 0.968195).\nMASTER-II is 2x4sq.degrees (Lipunov et al., 2010, Advances in Astronomy, \n2010, 30L)\n\nAt alert time the state at MASTER observatories are:\nMASTER-Amur            Object: Altitude: -61.72 Sun: Altitude: -37.55\nMASTER-Tunka           Object: Altitude: -64.60 Sun: Altitude: -25.23\nMASTER-Kislovodsk      Object: Altitude: -35.78 Sun: Altitude:  13.57\nMASTER-SAAO            Object: Altitude:  11.19 Sun: Altitude:  37.97, \ninspect on13 Mar, mlim=19.2, 20 images\nMASTEC-IAC(Tenerife)   Object: Altitude:  13.06 Sun: Altitude:  57.41\nMASTER-OAFA(Argentina) Object: Altitude:  84.05 Sun: Altitude:  39.69, \ninspect on 13,19 Mar, mlim=18.5-19.1, 16 images\n\nMASTER auto-detection software doesn't detect optical transient, that can \nbe connected with IC alert.\n\nWe analized SWIFT Xray sources (Keivani et al., GCN#20890)\n\n1) 20 21 21.41 -26 01 32.3\nThere is no optical sources up to unfiltered mlim=19.2 during MASTER-SAAO \ninspection of this IC170312 alert on 2017-03-13 02:37:14UT, and mlim=18.5 \n(2017-03-14 08:38:51UT), mlim=18.7(2017-03-18 07:38:23UT) in MASTER-OAFA .\nThere is a faint MASTER optical detection with m<< (unfiltered mlim=19.9) \nin MASTER-IAC database on 2016-07-28 00:13:46UT.\nThe nearest optical source in VIZIER database is in 5.5\", also GALEX \nsource(offset is 6.7\").\n\n2)20 21 54.52 -26 04 12.0\nThere is a variable optical source in MASTER database (17.5-18.7 \nMASTER-IAC, MASTER-SAAO) with m_OT=18.3 on 2017-03-13 02:59:57.059UT \n(MASTER-SAAO)\n\nThere is a GALEX source in 2.6\", also optical (USNO,etc) and possible AGN \n(Secrest+, 2015).\nhttp://vizier.u-strasbg.fr/viz-bin/VizieR?-source=&-out.add=_r&-out.add=_RAJ%2C_DEJ&-sort=_r&-to=&-out.max=20&-meta.ucd=2&-meta.foot=1&-c=305.47716666667+-26.07&-c.rs=5\n\n3) 20 18 26.4s -26 50 24.6\nVariable optical source in MASTER database :\nm_OT=18.7 on 2017-03-13 02:59:57.059UT (MASTER-SAAO)\n17.8(2016-10-21 00:34:28.062UT) - 18.8 (2017-03-18 07:34:39.474) \nMASTER-OAFA\n\n4) 20 16 34.69 -26 38 56.6\nThere is no optical sources brighter then unfiltered mlim=19.2 during \nMASTER-SAAO inspection on 2017-03-13 02:24:33UT,\nand in archive images in MASTER-IAC on 2016-07-11 01:42:30UT with \nmlim=20.2\nThere is no sources in VIZIER\n\n5) 20 19 25.94 -26 06 09.9\nThere is an optical source in MASTER-SAAO with m_OT~19.3 (mlim=19.5)\n\nThere is USNO-B1 star with R1=19.20, B2=20.44 in 1.6\", also candidate to \nAGN (Secrest+, 2015).\nhttp://vizier.u-strasbg.fr/viz-bin/VizieR?-source=&-out.add=_r&-out.add=_RAJ%2C_DEJ&-sort=_r&-to=&-out.max=20&-meta.ucd=2&-meta.foot=1&-c=304.85808333333+-26.10275&-c.rs=5\n\n\nThe message may be cited.",
  "circularId": 20903,
  "createdOn": 1489831947000,
  "email": "lipunov@xray.sai.msu.ru",
  "subject": "IceCube-170312A: MASTER follow-up observations",
  "submitter": "Vladimir Lipunov at Moscow State U/Krylov Obs  <lipunov@xray.sai.msu.ru>",
  "eventId": "IceCube-170312A"
}