{
  "bibcode": "2020GCN.28615....1J",
  "body": "Martin Jelinek and Jan Strobl (ASU CAS Ondrejov, CZ),\nSergey Karpov, Martin Masek, Petr Janecek, Jakub Jurysek,\nJan Ebr, Ronan Cunniffe, Petr Travnicek and Michael Prouza\n(Institute of Physics, Prague, CZ)\n\nreport:\n\nThe 25cm robotic telescope FRAM-ORM at La Palma (Spain) reacted robotically\nto the alert of GRB201013A (Page et al GCNC 28607), obtaining a series of\n20 s unfiltered images starting at 03:47:01.3 UT, i.e. 31.3s post trigger.\n\nThere is a relatively bright star (R~16.3) within the errorbox of the XRT\nlocalization. With the relatively coarse resolution of the 25 cm telescope,\ndirect detection of a faint object within the XRT errorbox is impossible.\n\nWe performed aperture photometry of the star. There seems to be an excess\nflux of ~3.5 sigma by ~ 570 s post trigger. This is when optical afterglows\noften show maxima in their\nlightcurves.\n\nWe also performed image subtraction of a sum of four images obtained at the\ntime of the detected peak and twelve latest images of the series. The\nresulting frame contains a very\nweak residual towards the position of the X-ray afterglow from the star\ncenter.\n\nWe therefore conclude that there is a slight possibility of an afterglow\npeaking at R~17.0, which was outshined by a nearby star of R~16.3.",
  "circularId": 28615,
  "createdOn": 1602629235000,
  "email": "martin.jelinek@asu.cas.cz",
  "subject": "GRB 201013A: FRAM-ORM possible afterglow candidate",
  "submitter": "Martin Jelinek at Astro.Inst-AVCR,Ondrejov  <martin.jelinek@asu.cas.cz>",
  "eventId": "GRB 201013A"
}