{
  "bibcode": "2019GCN.24341....1L",
  "body": "V. Lipunov, N.Tyurina, E. Gorbovskoy, V.Kornilov, D.Vlasenko, V.Vladimirov, D.Zimnukhov, A.Kuznetsov,\nP.Balanutsa, I.Gorbunov, A. Chasovnikov, V.Grinshpun, F.Balakin, T.Pogrosheva (Lomonosov Moscow State University, SAI, Physics Department),\n\nR. Rebolo, M. Serra, N. Lodieu, G. Israelian, L. Suarez-Andres (The Instituto de Astrofisica de Canarias),\n\nR. Podesta, C. Lopez, C.Francile, F. Podesta (Observatorio Astronomico  Felix Aguilar OAFA, San Juan National University),\n\nH.Levato (Instituto de Ciencias Astronomicas, de la Tierra y del Espacio ICATE,SJNU)\n\nD. Buckley (South African Astronomical Observatory),\n\nO. Gress, N.M. Budnev, O.Ershova (Applied Physics Institute, Irkutsk Stat University),\n\nV. Yurkov, A. Gabovich, Yu. Sergienko, D. Kobcev (Blagoveschensk EducationState University),\n\nA. Tlatov, V.Senik, A.V. Parhomenko, D. Dormidontov (Kislovodsk Solar  Station of the Pulkovo Observatory),\n\nMASTER Global Robotic Net (http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)\nstarted inspect of GW190426 /  LIGO/Virgo S190426c errorbox (Chatterjee et al. GCN 24237 https://gcn.gsfc.nasa.gov/other/S190426c.gcn3 )\nat 2019-04-26 16:15:47 UT  (Lipunov et al. GCN 24236) and continuied  several nights.\n\nThere is no OTs at GRAWITA positions ( Izzo et al. GCN 24340 ) several hours befor\n\n1) 21 57 16.26 +83 22 39.4\nDate_UT             unfiltmlim    MASTER_observatory\n2019-04-26 20:38:02      19.6     MASTER-Kislovodsk\n2019-04-26 18:38:53      19.6     MASTER-Tavrida\n2019-04-26 16:41:15      19.2\t  MASTER-Tunka\n\nThere is variable star in 5\", presented in GSC2.3.2 (red fmag=19.9 in 1996), PanSTARR source with rmag=20.73(2010Dec30). It's not presented in \nUSNO-B1, it means 22mPOSS limit in history.\n\n2)  22:01:04.54    +83:48:36.9\nDate_UT            unfiltmlim   MASTER_observatory\n2019-04-26 20:38:02    19.6    MASTER-Kislovodsk\n2019-04-26 18:38:53    19.6    MASTER-Tavrida\n2019-04-26 16:25:18    19.6    MASTER-Tunka\n2019-04-27 11:59:22    16.5    MASTER-Amur\n\nthere is also a star in 6.9\" in PanSTARR catalogue with imag=21.14 (no  g,r)\n\n3) 22 00 50.38 +84 44 36.5\nDate_UT              unfiltmlim        MASTER_observatory\n2019-04-26 20:56:51   20.0             MASTER-Tavrida\n2019-04-26 20:38:02   19.7             MASTER-Kislovodsk\n2019-04-26 16:25:18   19.5             MASTER-Tunka\n\nThere is a star in 4.3\" in USNO-B1 (B1=20.77,R1=19.08) with proper motion .\n\n\n\nThe message may be cited.",
  "circularId": 24341,
  "createdOn": 1556538421000,
  "email": "lipunov@xray.sai.msu.ru",
  "subject": "LIGO/Virgo S190426c: MASTER analysys of GRAWITA transients",
  "submitter": "Vladimir Lipunov at Moscow State U/Krylov Obs  <lipunov@xray.sai.msu.ru>",
  "eventId": "LIGO/Virgo S190426c"
}