{
  "bibcode": "2020GCN.26903....1L",
  "body": "V. Lipunov, E. Gorbovskoy, V.Kornilov, N.Tyurina, P.Balanutsa, A.Kuznetsov, F.Balakin, \nV.Vladimirov, D. Vlasenko, I.Gorbunov, D.Zimnukhov, V.Senik, T.Pogrosheva,\nD.Kuvshinov,  D. Cheryasov\n(Lomonosov Moscow State University, SAI, Physics Department),\n\nR. Podesta, C.Lopez, F. Podesta, C.Francile \n(Observatorio Astronomico Felix Aguilar OAFA),\n\nH.Levato \n(Instituto de Ciencias Astronomicas, de la Tierra y del Espacio ICATE),\n\nR. Rebolo, M. Serra \n(The Instituto de Astrofisica de Canarias),\n\nD. Buckley \n(South African Astronomical Observatory),\n\nO.A. Gres, N.M. Budnev, O.Ershova \n(Irkutsk State University, API),\n\nA. Tlatov, D. Dormidontov \n(Kislovodsk Solar Station of the Pulkovo Observatory),\n\nV. Yurkov, A. Gabovich, Yu. Sergienko \n(Blagoveschensk Educational State University)\n\n\n\n\nMASTER-SAAO robotic telescope  (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)  located in South Africa (South African Astronomical Observatory) started inspect of the LIGO/Virgo S200128d errorbox  37 sec after notice time and 322 sec after trigger time at 2020-01-28 02:25:33 UT, with upper limit up to  18.4 mag. The observations began at zenith distance = 41 deg. The sun  altitude  is -18.1 deg. \n\nMASTER-IAC robotic telescope  located in Spain (IAC Teide Observatory) started inspect of the LIGO/Virgo S200128d errorbox  71 sec after notice time and 356 sec after trigger time at 2020-01-28 02:26:07 UT, with upper limit up to  18.1 mag. The observations began at zenith distance = 68 deg. The sun  altitude  is -71.2 deg. \n\nThe galactic latitude b = 11 deg., longitude l = 332 deg.\n\n\nReal time updated cover map and OT discovered available here: \nhttps://master.sai.msu.ru/site/master2/ligo_1.php?id=11283\n\nWe obtain a following upper limits.  \n\nTmid-T0  |      Date Time      |          Site       |             Coord (J2000)          |Filt.| Expt. | Limit| Comment\n_________|_____________________|_____________________|____________________________________|_____|_______|_______|________\n\n     353 | 2020-01-28 02:25:33 |         MASTER-SAAO | (15h 32m 49.48s , -42d 18m 49.4s) |   C |    60 | 18.4 |        \n     392 | 2020-01-28 02:26:07 |          MASTER-IAC | (04h 23m 02.77s , +35d 36m 33.1s) |  P| |    70 | 18.1 |        \nFilter C is a clear (unfiltred) band. \n\n\nThe observation and reduction will continue. \nThe message may be cited.",
  "circularId": 26903,
  "createdOn": 1580178896000,
  "email": "lipunov@xray.sai.msu.ru",
  "subject": "LIGO/Virgo S200128d: Global MASTER-Net observations report",
  "submitter": "Vladimir Lipunov at Moscow State U/Krylov Obs  <lipunov@xray.sai.msu.ru>",
  "eventId": "LIGO/Virgo S200128d"
}