{ "id": "2404.09242", "version": "v1", "published": "2024-04-14T13:07:39.000Z", "updated": "2024-04-14T13:07:39.000Z", "title": "Constraining Near-Simultaneous Radio Emission from Short Gamma-ray Bursts using CHIME/FRB", "authors": [ "Alice P. Curtin", "Sloane Sirota", "Victoria M. Kaspi", "Shriharsh P. Tendulkar", "Mohit Bhardwaj", "Amanda M. Cook", "Wen-Fai Fong", "B. M. Gaensler", "Robert A. Main", "Kiyoshi W. Masui", "Daniele Michilli", "Ayush Pandhi", "Aaron B. Pearlman", "Paul Scholz", "Kaitlyn Shin" ], "comment": "24 pages, 5 figures, 7 tables", "categories": [ "astro-ph.HE" ], "abstract": "We use the Canadian Hydrogen Intensity Mapping Experiment (CHIME) Fast Radio Burst (FRB) Project to search for FRBs that are temporally and spatially coincident with gamma-ray bursts (GRBs) occurring between 2018 July 7 and 2023 August 3. We do not find any temporal (within 1 week) and spatial (within overlapping 3 sigma localization regions) coincidences between any CHIME/FRB candidates and all GRBs with 1 sigma localization uncertainties <1 deg. As such, we use CHIME/FRB to constrain the possible FRB-like radio emission for 27 short gamma-ray bursts (SGRBs) that were within 17 deg. of CHIME/FRB's meridian at a point either 6 hrs prior up to 12 hrs after the high-energy emission. Two SGRBs, GRB 210909A and GRB 230208A, were above the horizon at CHIME at the time of their high-energy emission and we place some of the first constraints on simultaneous FRB-like radio emission from SGRBs. While neither of these two SGRBs have known redshifts, we construct a redshift range for each GRB based on their high-energy fluence and a derived SGRB energy distribution. For GRB 210909A, this redshift range corresponds to z = [0.009, 1.64] with a mean of z=0.13. Thus, for GRB 210909A, we constrain the radio luminosity at the time of the high-energy emission to L <2 x 10e46 erg s-1, L < 5 x 10e44 erg s-1, and L < 3 x 10e42 erg s-1 assuming redshifts of z=0.85, z=0.16, and z=0.013, respectively. We compare these constraints with the predicted simultaneous radio luminosities from different compact object merger models.", "revisions": [ { "version": "v1", "updated": "2024-04-14T13:07:39.000Z" } ], "analyses": { "keywords": [ "short gamma-ray bursts", "constraining near-simultaneous radio emission", "hydrogen intensity mapping experiment", "high-energy emission", "grb 210909a" ], "note": { "typesetting": "TeX", "pages": 24, "language": "en", "license": "arXiv", "status": "editable" } } }