GRB 230911A: The First Discovery of a Fermi GRB Optical Counterpart with the Gravitational-wave Optical Transient Observer (GOTO)
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Published:2024-01-04
Issue:1
Volume:8
Page:6
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ISSN:2515-5172
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Container-title:Research Notes of the AAS
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language:
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Short-container-title:Res. Notes AAS
Author:
Belkin S., Gompertz B. P.ORCID, Kumar A.ORCID, Ackley K., Galloway D. K.ORCID, Jiménez-Ibarra F., Killestein T. L.ORCID, O’Neill D., Wiersema K.ORCID, Malesani D. B.ORCID, Levan A. J.ORCID, Lyman J.ORCID, Dyer M. J., Ulaczyk K.ORCID, Steeghs D., Dhillon V. S., O’Brien P., Ramsay G.ORCID, Noysena K.ORCID, Kotak R.ORCID, Breton R. P.ORCID, Nuttall L. K., Pallé E.ORCID, Pollacco D.ORCID, Awiphan S., Burhanudin U., Chote P., Chrimes A., Daw E., Duffy C., Eyles-Ferris R.ORCID, Godson B., Heikkilä T., Irawati P.ORCID, Kelsey L., Kennedy M. R., Littlefair S.ORCID, Makrygianni L.ORCID, Marsh T., Mata Sánchez D.ORCID, Mattila S., Maund J.ORCID, McCormac J.ORCID, Mkrtichian D., Mullaney J.ORCID, Patel M., Rana J., Rol E., Sawangwit U., Stanway E.ORCID, Starling R.ORCID, Strøm P. A.ORCID, Warwick B.
Abstract
Abstract
We report on the detection of candidate optical counterpart GOTO23akf/AT2023shv to the GRB 230911A with the Gravitational-wave Optical Transient Observer (GOTO) instruments located at La Palma, Canary Islands, and Siding Spring Observatory, Australia. The Fermi Gamma-ray Burst Monitor, which finds gamma-ray bursts (GRBs) nearly every two days, detected GRB 230911A with a statistical uncertainty of 4.°1. However, the large (∼10–100 deg2) localization areas mostly impede the rapid identification of an optical counterpart. GOTO facilities fully covered 90% localization area of the GRB 230911A. We proposed GOTO23akf as the optical afterglow of GRB 230911A, subsequently confirmed through Swift-X-Ray Telescope observations in which an uncatalogued X-ray source spatially coincident with the GOTO candidate was detected. This is the first optical afterglow discovery for a Fermi GRB with the newly expanded GOTO network.
Funder
UKRI ∣ Science and Technology Facilities Council
Publisher
American Astronomical Society
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