GCN Circular 31492
Subject
GRB 220117B: z-band limit
Date
2022-01-18T21:55:44Z (2 years ago)
From
Daniele B Malesani at Radboud U <d.malesani@astro.ru.nl>
A. Rossi (INAF/OAS), J. Palmerio (CNRS, GEPI - Paris Observatory), D. B.
Malesani (Radboud Univ. and DAWN/NBI), N. R. Tanvir (Univ. Leicester),
D. A. Kann (IAA/CSIC) report on behalf of the Stargate collaboration:
We observed the field of GRB 220117B (Melandri et al., GCN 31468) using
the acquisition camera of the X-shooter spectrograph, mounted on the ESO
VLT UT3 (Melipal). A single z-band image (120 s exposure time) is
available to us, taken approximately on January 18.2 UT (about 8.3 hr
after the GRB).
Inside the XRT position (Evans et al., GCN 31473), we detect no source
down to a limiting magnitude z > 21.5 mag (AB, 3 sigma limit).
We acknowledge excellent support from the ESO observing staff in
Paranal, in particular Michael Abdul-Masih, Diego Parraguez, and
Jonathan Smoker.