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GRB 230911A: The First Discovery of a Fermi GRB Optical Counterpart with the Gravitational-wave Optical Transient Observer (GOTO)

  • S. Belkin
  • , B. P. Gompertz
  • , A. Kumar
  • , K. Ackley
  • , D. K. Galloway
  • , F. Jiménez-Ibarra
  • , T. L. Killestein
  • , D. O’Neill
  • , K. Wiersema
  • , D. B. Malesani
  • , A. J. Levan
  • , J. Lyman
  • , M. J. Dyer
  • , K. Ulaczyk
  • , D. Steeghs
  • , V. S. Dhillon
  • , P. O’Brien
  • , G. Ramsay
  • , K. Noysena
  • , R. Kotak
  • R. P. Breton, L. K. Nuttall, E. Pallé, D. Pollacco, S. Awiphan, U. Burhanudin, P. Chote, A. Chrimes, E. Daw, C. Duffy, R. Eyles-Ferris, B. Godson, T. Heikkilä, P. Irawati, L. Kelsey, M. R. Kennedy, S. Littlefair, L. Makrygianni, T. Marsh, D. Mata Sánchez, S. Mattila, J. Maund, J. McCormac, D. Mkrtichian, J. Mullaney, M. Patel, J. Rana, E. Rol, U. Sawangwit, E. Stanway, R. Starling, P. A. Strøm, B. Warwick
  • Monash University
  • University of Birmingham
  • University of Warwick
  • University of Turku
  • University of Hertfordshire
  • Radboud University Nijmegen
  • University of Sheffield
  • University of Leicester
  • Armagh Observatory & Planetarium
  • National Astronomical Research Institute of Thailand
  • University of Turku
  • University of Manchester
  • Instituto de Astrofísica de Canarias
  • University of Portsmouth

Research output: Contribution to journalArticlepeer-review

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 deg 2 ) 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.
Original languageEnglish (Ireland)
Pages (from-to)6
JournalResearch Notes of the AAS
Volume8
Issue number1
DOIs
Publication statusPublished - Apr 2024

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