{
  "bibcode": "2020GCN.28382....1D",
  "body": "A. de Ugarte Postigo (HETH/IAA-CSIC, DARK/NBI), D. A. Kann, \nC. C. Thoene, M. Blazek, J. F. Agui Fernandez (all HETH/IAA-CSIC), \nD. Reverte Paya (GTC) report:\n\nWe observed the field of GRB 200906A (Page et al., GCN #28371; \nGBM detection: Fermi GBM Team, GCN #28370; Hamburg et al., \nGCN #28374) with EMIR on the 10.4m GTC telescope, at the Roque \nde los Muchachos Observatory (La Palma, Spain). The observation \nconsisted of H-band imaging with a total integration time of 955 s, and \na mean epoch on the 6th of September at 23:57:35 UT (10.5753 hr \nafter the Swift trigger).\n\nNo source is detected within the refined XRT error circle (Beardmore \net al., GCN #28373) down to a 3-sigma limit of \n\nH(AB) > 23.5 mag \n\nThis non detection is consistent with the previously reported limits \n(Fu et al., GCN#28372; Kann et al., GCN#28376; Kumar et al., \nGCN#28377; Gropp et al., GCN#28379; Rossi et al. GCN#28381)\nand confirms the dark nature of the burst.",
  "circularId": 28382,
  "createdOn": 1599503174000,
  "email": "deugarte@iaa.es",
  "subject": "GRB 200906A: EMIR/GTC NIR upper limit",
  "submitter": "Antonio de Ugarte Postigo at IAA-CSIC  <deugarte@iaa.es>",
  "eventId": "GRB 200906A"
}