GCN Circular 44296

Subject

EP260409a: Early NIR limits from MIRAGE on the MDM 1.3m telescope

Event

EP260409a

Date

2026-04-14T17:44:51Z (a day ago)

From

Viraj Karambelkar at Indian Inst of Tech,Bombay <karambelkarvraj21197@gmail.com>

Via

Web form

 V. Karambelkar, K. De (Columbia University), G. Mo (Carnegie/Caltech), S. Ibrahim, D. Schiminovich (Columbia University)
 
 We observed the field of the fast X-ray transient EP260409a (Jiang et al. 2026, GCN 44240Loading...
 
 ) 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.

We do not detect the counterpart reported by Quirola-Vasquez et al., GCN 44264Loading...
 
  to 5-sigma limits of 

J >~ 19.5 mag (AB)
Hs >~ 19.8 mag (AB)

MIRAGE is a new YJHs-band near-infrared imager for the MDM 1.3m telescope. We thank the MDM Observatory staff for supporting the observations.