{
  "submitter": "Dmitry Frederiks at Ioffe Institute <fred@mail.ioffe.ru>",
  "circularId": 34414,
  "body": "D. Frederiks, A.Lysenko, A. Ridnaia, D. Svinkin,\nA. Tsvetkova,  M. Ulanov, and T. Cline,\non behalf of the Konus-Wind team, report:\n\nAssuming the spectrum and the observer-frame energetics of the very bright\nGRB 230812B measured by KW (GCN 34403); the source redshift z=0.360\n(de Ugarte Postigo et al., GCNs 34409, 34410); and a standard cosmology\nwith H_0 = 67.3 km/s/Mpc, Omega_M = 0.315, and Omega_Lambda = 0.685 (Planck Collaboration, 2014);\nwe estimate the burst isotropic energy release E_iso to (1.09 ± 0.02)x10^53 erg,\nthe isotropic peak luminosity L_iso to (1.25 ± 0.05)x10^53 erg/s,\nthe rest-frame peak energy of the time-integrated spectrum Ep,i,z to (392 ± 16) keV,\nand the rest-frame peak energy at the peak of the emission Ep,p,z to (604 ± 41) keV.\n\nWith the obtained estimates, GRB 220627A fits perfectly both 'Amati' and 'Yonetoku'\nrelations derived for the sample of >300 long KW GRBs with known redshifts\n(Tsvetkova et al., 2017; Tsvetkova et al., 2021), see\nhttp://www.ioffe.ru/LEA/GRBs/GRB230812_T68292/GRB230812B_rest_frame.pdf\nThis suggests that an energy reservoir powering the burst and its emission mechanism\nare similar to that typical of long-duration GRBs.\n\nAll the quoted errors are estimated at the 90% confidence level.\nAll the presented results are preliminary.\n\n",
  "bibcode": "2023GCN.34414....1F",
  "eventId": "GRB 230812B",
  "subject": "GRB 230812B: rest-frame energetics from Konus-Wind observation",
  "createdOn": 1692019602742,
  "submittedHow": "email-legacy"
}