{
  "bibcode": "2015GCN.17903....1P",
  "body": "A. Pozanenko (IKI), E. Mazaeva (IKI),  A. Sergeev (IRA NASU, IAKhNU), I. \nReva (Fesenkov Astrophysical Institute), A. Volnova (IKI),  E. Klunko \n(ISTP), I. Korobtsev (ISTP), report on behalf of larger GRB follow-up \ncollaboration:\n\nWe observed the field of the MAXI/GSC GRB 150518A (Kawamuro, et al., GCN \n17825) with AZT-33IK telescope of Sayan observatory (Mondy), Zeiss-1000 \n(East) 1-m telescope of Tien Shan Astronomical\nObservatory and AZT-22 telescope of Maidanak observatory.\nObservations are continuing in R-filter. The SDSS J153648.25+161946.9 \ngalaxy which coincides with the optical afterglow (Xu et al., GCN 17829) \nis  detected in all observations. The light curve of the host \ngalaxy+afterglow are suggesting re-brightening with a possible maximum \nbrightness on June 2-5.  We suggest that this re-brightening can be \nattributed to Supernova associated with GRB 150518A.  Preliminary light \ncurve of the possible SN+host can be found in \nhttp://grb.rssi.ru/GRB150518A/GRB150518A_lc.png\n\nPhotometry of the host galaxy+SN at the possible maximum brightness  are \nfollowing\n\nDate       UT start   t-T0     Filter     OT    Err.  Observatory\n                       (mid, days)\n\n2015-06-02 17:43:30   14.8605  R          20.89 0.13  TSHAO\n2015-06-03 20:33:20   15.8862  R          20.82 0.10  Maidanak\n2015-06-05 18:11:19   17.8535  R          20.90 0.07  Maidanak\n\nPhotometry is based on SDSS DR9 stars:\n\nSDSS9_id            R(Lupton)\nJ153646.11+161904.1    17.65\nJ153638.21+162002.8    18.41\nJ153637.55+162040.3    17.10\nJ153645.59+162055.5    16.35\n\nThe maximum brightness of a the possible Supernova is an agreement with \nthe brightness predicted for the SN at redshift z = 0.256 (Xu et al., \nGCN 17832).",
  "circularId": 17903,
  "createdOn": 1433603955000,
  "email": "apozanen@iki.rssi.ru",
  "subject": "GRB 150518A: possible SN observations",
  "submitter": "Alexei Pozanenko at IKI, Moscow  <apozanen@iki.rssi.ru>",
  "eventId": "GRB 150518A"
}