{
  "bibcode": "2022GCN.32383....1N",
  "body": "A. Nicuesa Guelbenzu, S. Klose (both TLS Tautenburg), and A. Rau (MPE\nGarching) report:\n\nWe observed the field of GRB 220711B (D'Ai et al., GCN 32366;\nBeardmore et al. GCN 32370) with GROND mounted at the 2.2m MPG\ntelescope at La Silla Observatory (Chile).\n\nObservations started at 01:53 UT on July 13, 2022, about 32 hr after\nthe GRB trigger and were on target for  40 minutes. They were performed\nat an average seeing of 1.0 arcsec and at an airmass of 1.7.\n\nThe fading source discovered by Malesani et al. (GCN 32377) is\ndetected in the combined JHK images. For the individual bands we can\nonly provide the following preliminary upper limits (midtime of 2:20\nUT):\n\n  g' > 23.0,\n  r' > 23.5,\n  i' > 23.2,\n  z' > 19.8,\n  J  > 21.7,\n  H  > 21.1,\n  K  > 20.1  (AB mag; 3 sigma).\n\nThe given limits are derived based on calibrating the optical images\nagainst the SDSS catalog and the JHK data against 2MASS stars.\nWe thank Sam Kim and Regis Lachaume for excellent support and for\nperforming the observations.",
  "circularId": 32383,
  "createdOn": 1657723965000,
  "email": "ana@tls-tautenburg.de",
  "subject": "GRB 220711B, GROND observations",
  "submitter": "Ana Nicuesa at TLS Tautenburg  <ana@tls-tautenburg.de>",
  "eventId": "GRB 220711B"
}