! Swift/XRT hardness ratio of trigger: 1344131, name: GRB 250821A
 ! T0 for this burst is Swift MET=777466013.505997 s, = 2025 Aug 21 at 10:46:17.310 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: 

READ TERR 1
READ SERR 2
NO	NO	NO	NO	NO
! PC -- hard data
!Time		Err (pos)	Err(neg)	Rate		Error
251.177	134.774	-100.913	0.105257	0.023677
487.425	176.839	-101.473	0.066995	0.017437
959.825	4450.187	-295.562	0.019202	0.004536
NO	NO	NO	NO	NO
! PC -- soft data
!Time		Err (pos)	Err(neg)	Rate		Error
251.177	134.774	-100.913	0.121372	0.025489
487.425	176.839	-101.473	0.106358	0.021914
959.825	4450.187	-295.562	0.014687	0.004016
NO	NO	NO	NO	NO
! PC -- hardness ratio data
!Time		Err (pos)	Err(neg)	Rate		Error
251.177	134.774	-100.913	0.867231	0.266884
487.425	176.839	-101.473	0.629900	0.209096
959.825	4450.187	-295.562	1.307489	0.472416