{
  "bibcode": "2015GCN.17706....1M",
  "body": "G. Masi and P. L. Catalano, the Virtual Telescope Project - Italy, report:\n\nWe started time-series observations of GRB 150413A (C. B. Markwardt et al., GCN \n17688) with the 17\" robotic unit part of the Virtual Telescope (Ceccano, Italy) \nat 21:25:00 UT, that is 7.5 hours after the burst.\n\nAn optical source is visible where described by K.Ivanov et al. (GCN 117689) on \n60s and 120s exposures, unfiltered. The position of the source is RA: 12 41 \n41.97 Decl.: +71 50 27.7 (J2000.0, mean residuals of 0.2\") and the magnitude was \nestimated to be 18.0, assuming R mags for the reference stars from UCAC-4.\n\nWe covered the source for about one hour, detecting a fadind of about 0.4 mags \nfrom the start to the end of the series.\n\nDetails are available on the page:\nhttp://goo.gl/8jCkhs\n\nThis message can be cited.",
  "circularId": 17706,
  "createdOn": 1429093355000,
  "email": "gianluca@bellatrixobservatory.org",
  "subject": "GRB 150413A : Virtual Telescope optical observations",
  "submitter": "Gianluca Masi at Bellatrix Astronomical Obs  <gianluca@bellatrixobservatory.org>",
  "eventId": "GRB 150413A"
}