{
  "submittedHow": "web",
  "eventId": "GRB 230815A",
  "createdOn": 1692290484929,
  "body": "B. Schneider (MIT), A. Chrimes (Radboud), D. B. Malesani (Radboud and DAWN/NBI), \nA. J. Levan (Radboud), N. R. Tanvir (U. Leicester), A. de Ugarte Postigo (OCA/CNRS), \nreport on behalf of the Stargate collaboration:\n\nWe observed the field of GRB 230815A (Klingler et al., GCN 34434; \nMailyan et al. GCN 34440) with the ESO Very Large Telescope, equipped \nwith the HAWK-I near-infrared camera. Observations consisted of two \nepochs of 20 min exposure in the H band at 23:19:53 UT on 2023-08-15 \n(~12.5 hr after trigger) and 23:15:46 UT on 2023-08-16 (~36.4 hr after \ntrigger).\n\nIn both epochs, we clearly detected two sources consistent with the XRT \nerror circle (Beardmore et al., GCN 34437). One of the sources has \nsignificantly faded (~2 mag) between the two epochs, evolving from \nAB mag = 20.11 +/- 0.02 to AB mag = 22.01 +/- 0.08. This corresponds \nto a power-law decay index of 1.65,  similar to the X-ray decay rate, \nsuggesting a small host contribution to the NIR flux. The proposed \nafterglow of the burst is detected at coordinates:\n\nRA (J2000) = 12:18:53.24\nDEC (J2000) = -58:03:09.45\n\nwith an uncertainty of 0.3\".\n\nWe acknowledge the excellent support provided by the Paranal staff, \nin particular Joe Anderson.",
  "subject": "GRB 230815A: VLT/HAWK-I near-infrared afterglow detection",
  "circularId": 34467,
  "bibcode": "2023GCN.34467....1S",
  "submitter": "Benjamin Schneider at MIT <bschn@mit.edu>"
}