! Swift/XRT hardness ratio of trigger: 285653, name: GRB 070721A
 ! T0 for this burst is Swift MET=206704858.432 s, = 2007 Jul 21 at 10:00:56.330 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
260.939	364.150	-137.313	0.085683	0.019457
1171.982	819.583	-546.894	0.031595	0.006233
27462.640	15464.325	-9798.331	0.002086	0.000513
108444.406	234335.461	-62074.191	0.000995	0.000280
NO	NO	NO	NO	NO
! PC -- soft data
!Time		Err (pos)	Err(neg)	Rate		Error
260.939	364.150	-137.313	0.331975	0.042310
1171.982	819.583	-546.894	0.058824	0.008457
27462.640	15464.325	-9798.331	0.004593	0.000752
108444.406	234335.461	-62074.191	0.001020	0.000266
NO	NO	NO	NO	NO
! PC -- hardness ratio data
!Time		Err (pos)	Err(neg)	Rate		Error
260.939	364.150	-137.313	0.258101	0.067209
1171.982	819.583	-546.894	0.537114	0.131116
27462.640	15464.325	-9798.331	0.454154	0.134122
108444.406	234335.461	-62074.191	0.975506	0.373946