{
  "bibcode": "2019GCN.25908....1L",
  "body": "V. Lipunov, E. Gorbovskoy, V.Kornilov, N.Tiurina,F.Balakin,P.Balanutsa,A.Kuznetsov, V.Vladimirov, D. Vlasenko, I.Gorbunov,\nD.Zimnukhov,V.Senik, T.Pogrosheva, K.Pozdnyakov, A.Chasovnikov,V.Topolev,V.Shumkov, D.Kuvshinov(Lomonosov Moscow State University, SAI, Phys.Dep.),\nR. Podesta, C.Lopez, F. Podesta, C.Francile(Observatorio Astronomico Felix Aguilar of San Juan Natioal Univeristy, OAFA Argentina ),\nH.Levato(Instituto de Ciencias Astronomicas, de la Tierra y del Espacio ICATE SJNU),\nR. Rebolo, M. Serra(The Instituto de Astrofisica de Canarias),\nD. Buckley(South African Astronomical Observatory),\nO.A. Gres, N.M. Budnev, O.Ershova(Irkutsk State University, API),\nA. Tlatov, D. Dormidontov(Kislovodsk Solar Station of the Pulkovo Observatory),\nV. Yurkov, A. Gabovich, Yu. Sergienko(Blagoveschensk Educational State  University)\n\n  MASTER OT J205329.99+224421.2 (GCN 25900) - optical transient discovered \nat 2019-09-30 21:38:47UT in anonymous edge-on galaxy\nis located in the center of LVC S190930s error-box (mass gap event at 752 +- 223 Mpc, Ttrig=2019-09-30 14:34:07 UT\nLVC GCN #25871, Lipunov et al. GCN 25870; Lipunov et al.GCN 25900, Balanutsa et al., ATel 13151)\nand also\ninside LIGO/Virgo NS+BH S190930t (108 +-37Mpc, Ttrig=2019-09-30 13:35:41 UT\nLVC GCN #25871, Lipunov et al. GCN #25870).\n\nMASTER inspects both LVC error-boxes (PSN location is marked by *): \nLIGO/Virgo S190930t real-time cover map https://master.sai.msu.ru/site/master2/ligo_1.php?id=10866\nLIGO/Virgo S190930s cover map https://master.sai.msu.ru/site/master2/ligo_1.php?id=10856\n\nWe reobserved MASTER OT J205529.78+220725.5 in MASTER-Tavrida,\nit became brighter  on 6 images 2019-10-01 16:51:37- 18:15:11UT, m_OT~17.8.\n\nIn accordance with the distances for gavitational-wave alerts, we obtain \nthe following distance modulus and absolute magnitudes\n\nLVC_alert       Dist,Mpc   Dist.modulus   Mag (absolute) \nS190930t (min)    71       34.3          -15.5\nS190930t (max)    145      35.8          -17.0\nS190930s (min)    528      38.6          -19.8 \nS190930s (max)    976      39.9          -21.2",
  "circularId": 25908,
  "createdOn": 1569958208000,
  "email": "lipunov@xray.sai.msu.ru",
  "subject": "LIGO/Virgo S190930t and S190930s: MASTER OT J205529.78+220725.5/AT2019rpr further analysis",
  "submitter": "Vladimir Lipunov at Moscow State U/Krylov Obs  <lipunov@xray.sai.msu.ru>",
  "eventId": "LIGO/Virgo S190930t"
}