{
  "bibcode": "2021GCN.30080....1R",
  "body": "A Rossi (INAF-OAS) and D. B. Malesani (DTU space) report on behalf of \nthe CIBO collaboration:\n\nWe observed the field of GRB 210306A (D'Elia et al., GCN 29597) \nsimultaneously in the r' and z' bands with the LBC imager mounted on LBT \n(Mt Graham, AZ, USA). We obtained 20min of imaging on 2021-05-10, 65 \ndays after the burst trigger and 60 days after our first observation \n(Rossi et al., GCN 29645). Observations were performed under good \nweather conditions with an average seeing of ~1.3\".\n\nAt the location of the optical afterglow, we detected an object which is \nlikely the GRB host galaxy. We measure the following AB magnitudes:\n\nr=24.6+-0.2\nz=24.4+-0.4\n\ncalibrated against SDSS field stars.\n\nWe acknowledge the excellent support from the LBTO and LBT-INAF staff, \nparticularly A. Cardwell, S. Allanson, F. Cusano, S. Paiano and D. \nParis, in obtaining these observations.",
  "circularId": 30080,
  "createdOn": 1622032422000,
  "email": "andrea.rossi@inaf.it",
  "subject": "GRB 210306A: LBT observations of the likely host galaxy",
  "submitter": "Andrea Rossi at INAF  <andrea.rossi@inaf.it>",
  "eventId": "GRB 210306A"
}