! 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

READ TERR 1 2
! PC data
!Time    	T_+ve   	T_-ve   	Flux    	Fluxpos 	Fluxneg
33512.360	67.604	-82.835	5.91656189645367e-12	1.33185020029257e-12	-1.33185020029257e-12
33717.442	150.860	-137.478	4.13023166820578e-12	7.98802456190206e-13	-7.98802456190206e-13
39135.755	166.252	-124.595	2.76441107729774e-12	6.59709480187821e-13	-6.59709480187821e-13
40314.305	346.883	-252.362	1.85859534494235e-12	4.00425686232301e-13	-4.00425686232301e-13