{
  "submitter": "Viraj Karambelkar at Indian Inst of Tech,Bombay <karambelkarvraj21197@gmail.com>",
  "createdOn": 1776188691426,
  "submittedHow": "web",
  "subject": "EP260409a: Early NIR limits from MIRAGE on the MDM 1.3m telescope",
  "circularId": 44296,
  "bibcode": "2026GCN.44296....1K",
  "format": "text/plain",
  "body": " V. Karambelkar, K. De (Columbia University), G. Mo (Carnegie/Caltech), S. Ibrahim, D. Schiminovich (Columbia University)\n \n We observed the field of the fast X-ray transient EP260409a (Jiang et al. 2026, GCN 44240) using the MDM InfraRed Astronomy inGaas Explorer (MIRAGE) instrument on the MDM 1.3m telescope in the near-infrared J and Hs bands.  Observations were carried out starting at UTC 2026-04-09T03:10:30 in the J-band and 2026-04-09T03:40:58 in the H-band, approximately three hours after the EP trigger. The exposures lasted for a total of 16 minutes in the J-band and 32 minutes in the H-band.\n\nWe do not detect the counterpart reported by Quirola-Vasquez et al., GCN 44264 to 5-sigma limits of \n\nJ >~ 19.5 mag (AB)\nHs >~ 19.8 mag (AB)\n\nMIRAGE is a new YJHs-band near-infrared imager for the MDM 1.3m telescope. We thank the MDM Observatory staff for supporting the observations. \n",
  "eventId": "EP260409a"
}