GCN Circular 36452

Geoffrey Mo (MIT), Viraj Karambelkar (Caltech), Danielle Frostig (MIT), Benjamin Schneider (MIT), Robert Stein (Caltech), Nathan Lourie (MIT), Tomas Ahumada (Caltech), Robert Simcoe (MIT), and Mansi Kasliwal (Caltech) report:

We observed the field of GRB 240511A (Fermi GBM team, GCN 36428
Not found
 
 
; Laha et al., GCN 36430
Not found
 
 
) in the near-infrared J-band with the Palomar 1-m telescope, equipped with the 1 square degree WINTER camera (Lourie et al. 2020). 

Observations began at 2024-05-12T10:13:53 UTC (~16 hours after the GRB) and consisted of 15 x 120 s exposures. The images were processed using the WINTER data reduction pipeline (https://github.com/winter-telescope/mirar). 

We do not detect the optical counterpart discovered by NOT (Malesani et al., GCN 36442
Not found
 
 
; Lipunov et al., GCN 36435
Not found
 
 
; Lipunov et al., GCN 36436
Not found
 
 
; Niwano et al., GCN 36445
Not found
 
 
) at the Swift-XRT position of the afterglow (Evans et al., GCN 36431
Not found
 
 
; Salvaggio et al., GCN 36443
Not found
 
 
; Evans et al., GCN 36446
Not found
 
 
) setting the following upper limit: J ~ 19.1 mag (AB).

WINTER (Wide-field INfrared Transient ExploreR) is a partnership between MIT and Caltech, housed at Palomar Observatory, and funded by NSF MRI, NSF AAG, the David and Lucille Packard Foundation, and the MIT Kavli Institute for Astrophysics and Space Research.