! Swift/XRT hardness ratio of trigger: 21462, name: GRB 210901B - source 2
 ! 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   	Flux    	Fluxpos 	Fluxneg
257827.949	828.042	-888.371	3.05421760906607e-13	1.56183513546306e-13	-1.27555507711234e-13