GRB 230911A: The first discovery of a Fermi GRB optical counterpart with the gravitational-wave optical transient observer (GOTO)
- Belkin, S.
- Gompertz, B.P.
- Kumar, A.
- Ackley, K.
- Galloway, D.K.
- Jiménez-Ibarra, F.
- Killestein, T.L.
- O’Neill, D.
- Wiersema, K.
- Malesani, D.B.
- Levan, A.J.
- Lyman, J.
- Dyer, M.J.
- Ulaczyk, K.
- Steeghs, D.
- Dhillon, V.S.
- O’Brien, P.
- Ramsay, G.
- Noysena, K.
- Kotak, R.
- Breton, R.P.
- Nuttall, L.K.
- Pallé, E.
- Pollacco, D.
- Awiphan, S.
- Burhanudin, U.
- Chote, P.
- Chrimes, A.
- Daw, E.
- Duffy, C.
- Eyles-Ferris, R.
- Godson, B.
- Heikkilä, T.
- Irawati, P.
- Kelsey, L.
- Kennedy, M.R.
- Littlefair, S.
- Makrygianni, L.
- Marsh, T.
- Mata Sánchez, D.
- Mattila, S.
- Maund, J.
- McCormac, J.
- Mkrtichian, D.
- Mullaney, J.
- Patel, M.
- Rana, J.
- Rol, E.
- Sawangwit, U.
- Stanway, E.
- Starling, R.
- Strøm, P.A.
- Warwick, B.
DOIAbstract
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 4fdg1. 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 uncatalogu...
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