! Swift/XRT hardness ratio of trigger: 1069551, name: GRB 210820A ! T0 for this burst is Swift MET=651173908.288, = 2021 Aug 20 at 17:38:00.705 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 READ TERR 1 READ SERR 2 NO NO NO NO NO ! PC -- hard data !Time Err (pos) Err(neg) Rate Error 548.707 86.574 -76.401 0.423535 0.095397 819.724 349.615 -184.442 0.094861 0.021506 1494.109 367.247 -324.770 0.038474 0.008429 6817.415 821.910 -898.098 0.016732 0.003721 NO NO NO NO NO ! PC -- soft data !Time Err (pos) Err(neg) Rate Error 548.707 86.574 -76.401 1.833742 0.198167 819.724 349.615 -184.442 0.346031 0.044218 1494.109 367.247 -324.770 0.063592 0.010742 6817.415 821.910 -898.098 0.028203 0.004815 NO NO NO NO NO ! PC -- hardness ratio data !Time Err (pos) Err(neg) Rate Error 548.707 86.574 -76.401 0.230968 0.057701 819.724 349.615 -184.442 0.274140 0.071343 1494.109 367.247 -324.770 0.605014 0.167369 6817.415 821.910 -898.098 0.593280 0.166325