{
  "bibcode": "2019GCN.26066....1B",
  "body": "J. Bolmer (MPE Garching), and P. Schady (Univ. of Bath),  report:\n\nWe observed the field of GRB 191024A (Swift trigger 931242; Page et al., GCN #26063)\nsimultaneously in g'r'i'z'JHK with GROND (Greiner et al. 2008, PASP 120, 405) mounted\nat the 2.2 m MPG telescope at ESO La Silla Observatory (Chile).\n\nObservations started at 04:45:40 UT on 24th October, 3 minutes after the GRB trigger.\nThey were performed at an average seeing of 1.2\" and at an average airmass of 1.4.\n\nWe do not detect a source at the enhanced position of the Swift-XRT afterglow\n(Beardmore et al., GCN #26064) ��� down to the following 3-sigma limits (all AB magnitude) ��� \nin the stacked images of observations taken between 168 and 5906 seconds post trigger\n(total integration time of 95 min).\n\ng' > 25.5 mag\nr' > 25.6 mag\ni' > 24.8 mag\nz' > 23.4 mag\nJ > 21.9 mag\nH > 21.4 mag\nK > 20.2 mag\n\n\nGiven limits are calibrated against Sky-Mapper and 2MASS field stars and are not\ncorrected for the Galactic foreground extinction corresponding to a reddening of\nE_(B-V)= 0.01 in the direction of the burst (Schlafly & Finkbeiner 2011).",
  "circularId": 26066,
  "createdOn": 1571924869000,
  "email": "jan@bolmer.de",
  "subject": "GRB 191024A: GROND early upper limits",
  "submitter": "Jan Bolmer at MPE/Garching  <jan@bolmer.de>",
  "eventId": "GRB 191024A"
}