! Swift/XRT hardness ratio of trigger: 21462, name: GRB 210901B - source 1
 ! T0 for this burst is Swift MET=652147287.808, = 2021 Sep 01 at 00:01:00.000 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

READ TERR 1 2
! PC data
!Time    	T_+ve   	T_-ve   	Rate    	Ratepos 	Rateneg
258327.195	328.797	-1387.612	1.802365e-03	2.520866e-03	-1.776558e-03