GCN Circular 38627
Subject
EP 241217a: NIR detection with P200/WIRC
Event
Date
2024-12-18T21:10:18Z (a year ago)
From
Viraj Karambelkar at Indian Inst of Tech,Bombay <karambelkarvraj21197@gmail.com>
Via
legacy email
Viraj Karambelkar (Caltech), Tomas Ahumada (Caltech), and Mansi Kasliwal
(Caltech) report:
We observed the location of EP 241217a (Zhou et al., GCN 38586;) in the
NIR J-band and Ks-band with the Wide-Field Infrared Camera (WIRC, Wilson et
al. 2003) on the 200-inch Hale telescope at Palomar Observatory.
Observations began on 2024-12-18 01:40:00 UT (approx. 20 hours after the
EP detection), and comprise a series of 36 x 45 s exposures in the J-band
and 17 x 30 s in the K-band.
We detect a possible source at the Gemini counterpart location (Levan et
al., GCN 38587; Fan et al. GCN 38592; Levan et al. GCN 38593). We measure a
brightness of J ~ 20.7 +/- 0.1 mag (AB) and K ~ 19.3 +/- 0.1 mag (AB). We
thank Héctor Arce and the P200 staff for granting the observations.
We subsequently observed this transient with NIRES (Wilson et al. 2004) on
the Keck II telescope starting 2024-12-18 05:00:00 UT. We thank Michael
Lui, and the Keck staff for facilitating the observations.