! Swift/XRT hardness ratio of trigger: 849018, name: GRB 180721A
 ! T0 for this burst is Swift MET=553864029.696 s, = 2018 Jul 21 at 11:06:48.397 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
130.421	117.944	-47.539	0.750863	0.169321
459.537	245.158	-211.173	0.079315	0.017967
1125.892	596.768	-421.196	0.056441	0.009343
8771.262	4770.583	-3491.976	0.008181	0.001737
NO	NO	NO	NO	NO
! PC -- soft data
!Time		Err (pos)	Err(neg)	Rate		Error
130.421	117.944	-47.539	1.318893	0.224129
459.537	245.158	-211.173	0.209654	0.032007
1125.892	596.768	-421.196	0.128804	0.014343
8771.262	4770.583	-3491.976	0.017084	0.002501
NO	NO	NO	NO	NO
! PC -- hardness ratio data
!Time		Err (pos)	Err(neg)	Rate		Error
130.421	117.944	-47.539	0.569313	0.160754
459.537	245.158	-211.173	0.378313	0.103343
1125.892	596.768	-421.196	0.438196	0.087419
8771.262	4770.583	-3491.976	0.478872	0.123500