! Swift/XRT hardness ratio of trigger: 20885, name: GRB 190331B - source 1
 ! T0 for this burst is Swift MET=575697545.0, = 2019 Mar 31 at 03:58:42.340 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
241411.676	275002.441	-168121.904	0.003443	0.000814
NO NO NO NO NO
! PC -- soft data
!Time		Err (pos)	Err(neg)	Rate		Error
241411.676	275002.441	-168121.904	0.006773	0.001133
NO NO NO NO NO
! PC -- hardness ratio
!Time		Err (pos)	Err(neg)	Rate		Error
241411.676	275002.441	-168121.904	0.508336	0.147202