! Swift/XRT hardness ratio of trigger: 755354, name: GRB 170531B
 ! T0 for this burst is Swift MET=517960948.352 s, = 2017 May 31 at 22:02:09.206 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
420.902	296.748	-141.030	0.644031	0.129931
746.700	53.691	-29.050	0.510639	0.114307
884.913	136.121	-84.522	0.199529	0.043950
1311.816	328.522	-290.782	0.060335	0.011576
5825.744	291.437	-322.854	0.030353	0.007967
6595.616	469.322	-478.435	0.039569	0.007291
19101.505	33788.128	-11849.058	0.006445	0.001568
NO	NO	NO	NO	NO
! PC -- soft data
!Time		Err (pos)	Err(neg)	Rate		Error
420.902	296.748	-141.030	0.995890	0.159028
746.700	53.691	-29.050	0.863201	0.148513
884.913	136.121	-84.522	0.344097	0.057839
1311.816	328.522	-290.782	0.111664	0.015699
5825.744	291.437	-322.854	0.050557	0.010271
6595.616	469.322	-478.435	0.041705	0.007521
19101.505	33788.128	-11849.058	0.006991	0.001593
NO	NO	NO	NO	NO
! PC -- hardness ratio data
!Time		Err (pos)	Err(neg)	Rate		Error
420.902	296.748	-141.030	0.646689	0.166389
746.700	53.691	-29.050	0.591565	0.167016
884.913	136.121	-84.522	0.579865	0.160668
1311.816	328.522	-290.782	0.540326	0.128521
5825.744	291.437	-322.854	0.600377	0.199276
6595.616	469.322	-478.435	0.948781	0.244620
19101.505	33788.128	-11849.058	0.921839	0.307228