! Swift/XRT hardness ratio of trigger: 21514, name: GRB 220921A - source 1
 ! T0 for this burst is Swift MET=685451188.956, = 2022 Sep 21 at 11:05:59.000 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
35072.083	4229.924	-1642.559	0.047028	0.009908
NO	NO	NO	NO	NO
! PC -- soft data
!Time		Err (pos)	Err(neg)	Rate		Error
35072.083	4229.924	-1642.559	0.086173	0.013377
NO	NO	NO	NO	NO
! PC -- hardness ratio data
!Time		Err (pos)	Err(neg)	Rate		Error
35072.083	4229.924	-1642.559	0.545736	0.142816