{
  "bibcode": "2020GCN.26998....1V",
  "body": "J.-B. Vielfaure (GEPI - Paris Observatory), D. Xu (NAO/CAS), J. Palmerio \n(GEPI - Paris Observatory), D. B. Malesani (DTU Space), L. Izzo \n(DARK/NBI), D. A. Kann (HETH/IAA-CSIC), A. J. Levan (Radboud Univ.), G. \nPugliese (Univ. Amsterdam), N. R. Tanvir (Univ. Leicester) report on \nbehalf of the Stargate collabaration:\n\nWe observed the optical afterglow of GRB 200205B (Evans et al., GCN \n26993) using the ESO VLT UT2 (Kueyen) equipped with the X-shooter \nspectrograph. Our spectra cover the wavelength range 3000-25000 AA, and \nconsist of 4 exposures by 600 s each. The observation mid time was 2020 \nFeb 6.063 UT (6.16 hr after the GRB).\n\nIn a 30 s image taken with the acquisition camera on Feb 6.041 UT, we \ndetect the optical afterglow, for which we measure a magnitude r = 20.34 \n+- 0.03 AB (calibrated against nearby stars from the SkyMapper catalog; \nWolf et al. 2018, PASA, 35, 010; https:doi.org/10.4225/41/593620ad5b574).\n\nWe clearly detect continuum over the wavelength range 3100-24000 AA. \n From detection of multiple absorption features, which we interpret as \ndue to C ii, Si iv, Si ii, C iv, Fe ii, Al ii, Mg ii, we infer a \nredshift z = 1.465.\nEmission lines are also detected, which we interpret as due to the [O \nii] and [O iii] doublets, Hbeta, and Halpha, all at the above quoted \nredshift.\n\nWe acknowledge excellent support from the ESO observing staff in \nParanal, in particular J. Corral-Santana and J. Velasquez.",
  "circularId": 26998,
  "createdOn": 1580959058000,
  "email": "malesani@space.dtu.dk",
  "subject": "GRB 200205B: VLT/X-shooter redshift",
  "submitter": "Daniele B Malesani at DTU Space  <malesani@space.dtu.dk>",
  "eventId": "GRB 200205B"
}