{
  "bibcode": "2022GCN.32217....1O",
  "body": "B. O���Connor (UMD/GWU), E. Troja (U Tor Vergata/ASU) , S. Dichiara (PSU),\nand S. B. Cenko (NASA/GSFC) report on behalf of a larger collaboration:\n\nWe carried out additional target of opportunity observations of GRB220611A\n(Cenko et al.\nGCN 32191) with the Gemini Multi Object Spectrograph (GMOS) mounted on the\nGemini-South\ntelescope. The observations began 5.7 d after the GRB trigger, and were\nperformed in\ni-band for a total exposure of 540 s.\n\nWe detect the source reported by O���Connor et al. (GCN 32203) with magnitude\ni~21 AB.\nThis source is not detected in archival images from the Dark Energy Survey\n(Abbott et\nal. 2021), and is likely the GRB afterglow. We determine that the X-ray,\noptical,\nand infrared data (O���Connor et al. GCN 32203, Rastinejad et al. GCN 32208)\ncan be\nmodeled by a power-law with spectral index beta~1.\n\nFurther observations are planned.\n\nWe thank the Gemini staff for rapid scheduling of these observations.",
  "circularId": 32217,
  "createdOn": 1655558641000,
  "email": "eleonora.troja@nasa.gov",
  "subject": "GRB220611A: Gemini Optical Afterglow Confirmation",
  "submitter": "Eleonora Troja at GSFC  <eleonora.troja@nasa.gov>",
  "eventId": "GRB 220611A"
}