{
  "bibcode": "2022GCN.31606....1M",
  "body": "P. Minaev (IKI), A. Pozanenko (IKI) report on behalf of GRB IKI FuN:\n\nWe analysed GRB 220211A (The Fermi GBM team, GCN 31570; Tohuvavohu et \nal., GCN 31582; Ridnaia et al., GCN 31584; Svinkin et al., GCN 31599) \nusing publicly available data of GBM/Fermi. We estimate the duration in \n7 - 850 keV energy band T_90 = 0.11 +/- 0.02 s. We performed spectral \nanalysis in a time interval of (-0.05, 0.05) s, the best fit is obtained \nfor CPL model with following parameters: E_p = 924 (-210, +317) keV, \nalpha = -0.50 +/- 0.25. The fluence of F = (5.8 +/- 0.5)E-7 erg/cm**2 is \nobtained in 10 - 1000 keV energy band.\nUsing T_90,i - EH diagram [1,2] we classify the burst as type I (short) \nand find the minimal possible redshift value of z  = 0.13 and the most \nprobable value of the redshift z = 0.53.\n\nThe T_90,i - EH diagram can be found in\nhttp://grb.rssi.ru/GRB220211A/GRB220211A_EHD.png\n\nThe burst could also be classified as SGR Giant flare, placed at \ndistance of D_L = 8.7 Mpc.\n\n[1] - Minaev et al., MNRAS, 492, 1919, 2020\n[2] - Minaev et al., Astronomy Letters, 46, 9, 573, 2020",
  "circularId": 31606,
  "createdOn": 1645221849000,
  "email": "apozanen@iki.rssi.ru",
  "subject": "GRB 220211A: redshift lower limit estimating",
  "submitter": "Alexei Pozanenko at IKI, Moscow  <apozanen@iki.rssi.ru>",
  "eventId": "GRB 220211A"
}