TITLE: GCN CIRCULAR NUMBER: 36103 SUBJECT: GRB240414A : J-band upper limits from WINTER DATE: 24/04/14 22:55:41 GMT FROM: Viraj Karambelkar at Indian Inst of Tech,Bombay <karambelkarvraj21197@gmail.com> Viraj Karambelkar (Caltech), Tomas Ahumada (Caltech), Geoffrey Mo (MIT), Danielle Frostig (MIT), Robert Stein (Caltech), Nathan Lourie (MIT), Robert Simcoe (MIT), Mansi Kasliwal (Caltech) We observed the field of the GRB 240414A (GCN #36084, #36083, #36087, #36088, #36093, #36095, #36097, #36100, #36101) in the near-infrared J-band with the Palomar 1-m telescope, equipped with the 1 square degree WINTER camera (Lourie et al. 2020). Our observations started at UTC 2024-04-14T20:16:20 (MJD 60414.45) and lasted a total of 50 minutes. The images were processed through the WINTER data reduction pipeline implemented using mirar ( https://zenodo.org/records/10888437), with image subtraction performed relative to reference images built from the UKIRT Hemisphere Survey (Dye et al. 2017). We do not detect the optical counterpart reported by GCN #36084, #36085, #36097, #36101 in the J-band WINTER images, and derive a limiting mag. of J ~ 19 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 View this GCN Circular online at https://gcn.nasa.gov/circulars/36103. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...