{
  "eventId": "GRB 230805B",
  "body": "D. Turpin (CEA Paris-Saclay), C. Adami (LAM), B. Schneider (MIT),\nE. Le Floc'h, D. Götz, F. Schüssler (CEA Paris-Saclay), A. de Ugarte Postigo (OCA/CNRS),\nS. Basa (LAM), S. D. Vergani (GEPI, Obs. de Paris), report on behalf\nof a larger collaboration:\n\nWe observed the field of GRB 230805B (Cenko et al., GCN 34339; D'Ali et al.,\nGCN 34345; LaPorte et al., GCN 34251; Osborne et al. GCN 34353)\nusing the T193cm telescope at Observatoire de Haute-Provence (France)\nequipped with the MISTRAL spectro-imager. In 5 exposures, obtained\nin the r-band (5x600s) from 2023 05 August 20:36:08 UT to\n21:34:34 UT (mid-time ~9.69h after trigger) under poor seeing conditions,\nwe do not detect any source at the position reported by\nMoskvitin et al., GCN 34343; Malesani et al., GCN 34346; Hu et al., GCN 34347\ndown to the following 5-sigma limit:\n\nr > 21.5 mag (AB)\n\nThe photometric calibration was performed using nearby stars from\nthe PanSTARRS catalog and the magnitude is not corrected for Galactic\nextinction.\n\nWe acknowledge the excellent support from Observatoire de Haute-Provence,\nin particular Jean Balcaen for the MISTRAL observations and\nthe SOPHIE observer Lisa Altinier. ",
  "subject": "GRB 230805B : OHP/T193 optical upper limit",
  "circularId": 34356,
  "submittedHow": "web",
  "submitter": "Damien Turpin at CEA-Saclay <dturpin-astro@hotmail.com>",
  "bibcode": "2023GCN.34356....1T",
  "createdOn": 1691415271009
}