{
  "bibcode": "2022GCN.32928....1I",
  "body": "L. Izzo (DARK/NBI), D. B. Malesani (Radboud Univ. and DAWN/NBI), S. \nVejlgaard Nielsen (DAWN/NBI), N. R. Tanvir (Univ. Leicester), J. P. U. \nFynbo (DAWN/NBI), D. Xu (NAOC) report on behalf of the Stargate \ncollabaration:\n\nWe observed the optical afterglow of GRB 221110A (Williams et al., GCN \n32925; Lipunov et al., GCN 32924; Strausbaugh & Cucchiara, GCN 32926; \nPereyra et al., GCN 32927) using the ESO VLT UT3 (Melipal) equipped with \nthe X-shooter spectrograph. Our spectra cover the wavelength range \n3000-25000 AA, and consist of 2 exposures by 600 s each. The observation \nmid time was 2022 Nov 10.158 UT (1.33 hr after the GRB).\n\nWe clearly detect continuum over the wavelength range 6200-25000 AA. A \nsharp break is visible around 6200 AA, which we identify as due to H I. \n From detection of multiple absorption features, which we interpret as \ndue to Si IV, C IV, Fe II, O I, Si II, Al II, Al III, and many others, \nwe infer a redshift of z = 4.06. An intervening system is also detected \nfrom Fe II and Mg II at z = 2.724.\n\nWe acknowledge excellent support from the ESO observing staff in \nParanal, in particular Michael Marsset and Florian Rodler.",
  "circularId": 32928,
  "createdOn": 1668057521000,
  "email": "d.malesani@astro.ru.nl",
  "subject": "GRB 221110A: VLT/X-shooter redshift",
  "submitter": "Daniele B Malesani at Radboud U  <d.malesani@astro.ru.nl>",
  "eventId": "GRB 221110A"
}