! Swift/XRT hardness ratio of trigger: 21514, name: GRB 220921A ! T0 for this burst is Swift MET=685451188.956 s, = 2022 Sep 21 at 11:05:59.058 UT ! The hard band is 1.51-10 keV ! The soft band is 0.3-1.5 keV ! For details of light-curve production, see Evans et al. 2007, A&A, 469, 379 ! There are 3 datasets: Hard, Soft, and the ratio ! Columns are as labelled ! BINMODE: GRB-like (counts) READ TERR 1 READ SERR 2 NO NO NO NO NO ! PC -- hard data !Time Err (pos) Err(neg) Rate Error 34986.104 4315.904 -1556.579 0.050206 0.010174 41676.461 2796.479 -1614.517 0.032611 0.007981 116306.910 4649.801 -7848.706 0.008663 0.002050 NO NO NO NO NO ! PC -- soft data !Time Err (pos) Err(neg) Rate Error 34986.104 4315.904 -1556.579 0.088209 0.013396 41676.461 2796.479 -1614.517 0.032451 0.007998 116306.910 4649.801 -7848.706 0.019789 0.003070 NO NO NO NO NO ! PC -- hardness ratio data !Time Err (pos) Err(neg) Rate Error 34986.104 4315.904 -1556.579 0.569174 0.144136 41676.461 2796.479 -1614.517 1.004930 0.349037 116306.910 4649.801 -7848.706 0.437746 0.123886