! Swift/XRT hardness ratio of trigger: 20914, name: GRB 190731A - source 1
 ! T0 for this burst is Swift MET=586305503.0, = 2019 Jul 31 at 22:37:59.612 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
! PC -- hard data
!Time		Err (pos)	Err(neg)	Rate		Error
35992.770	4181.671	-2604.799	0.019496	0.004636
52629.392	4343.850	-7263.821	0.017462	0.004543
57745.718	809.626	-772.476	0.014030	0.003438
NO NO NO NO NO
! PC -- soft data
!Time		Err (pos)	Err(neg)	Rate		Error
35992.770	4181.671	-2604.799	0.023914	0.005126
52629.392	4343.850	-7263.821	0.017453	0.004542
57745.718	809.626	-772.476	0.019057	0.003997
NO NO NO NO NO
! PC -- hardness ratio
!Time		Err (pos)	Err(neg)	Rate		Error
35992.770	4181.671	-2604.799	0.815254	0.260989
52629.392	4343.850	-7263.821	1.000492	0.368162
57745.718	809.626	-772.476	0.736245	0.237479