! Swift/XRT hardness ratio of trigger: 1090472, name: GRB 211221A
 ! T0 for this burst is Swift MET=661812549.12 s, = 2021 Dec 21 at 20:48:40.822 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
! WT -- hard data
!Time		Err (pos)	Err(neg)	Rate		Error
66.332	6.603	-6.088	6.014804	0.782953
86.302	12.878	-13.367	5.859626	0.709150
NO	NO	NO	NO	NO
! WT -- soft data
!Time		Err (pos)	Err(neg)	Rate		Error
66.332	6.603	-6.088	2.781530	0.527572
86.302	12.878	-13.367	2.197545	0.404406
NO	NO	NO	NO	NO
! WT -- hardness ratio data
!Time		Err (pos)	Err(neg)	Rate		Error
66.332	6.603	-6.088	2.162408	0.492256
86.302	12.878	-13.367	2.666442	0.517288
NO	NO	NO	NO	NO
! PC -- hard data
!Time		Err (pos)	Err(neg)	Rate		Error
189.698	72.332	-75.600	2.975215	0.355633
613.236	393.461	-351.205	1.006985	0.092147
NO	NO	NO	NO	NO
! PC -- soft data
!Time		Err (pos)	Err(neg)	Rate		Error
189.698	72.332	-75.600	0.872022	0.193932
613.236	393.461	-351.205	0.316467	0.052028
NO	NO	NO	NO	NO
! PC -- hardness ratio data
!Time		Err (pos)	Err(neg)	Rate		Error
189.698	72.332	-75.600	3.411858	0.861431
613.236	393.461	-351.205	3.181955	0.598695