! Swift/XRT hardness ratio of trigger: 21816, name: GRB 250309B/IceCube-250309A - source 15
 ! T0 for this burst is Swift MET=763198746.212 s, = 2025 Mar 09 at 07:38:31.000 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
46950.481	851.866	-890.707	0.031781	0.007411
52349.463	917.122	-797.871	0.020210	0.004386
108402.373	17892.709	-51208.212	0.011723	0.002918
NO	NO	NO	NO	NO
! PC -- soft data
!Time		Err (pos)	Err(neg)	Rate		Error
46950.481	851.866	-890.707	0.043347	0.008571
52349.463	917.122	-797.871	0.034237	0.005711
108402.373	17892.709	-51208.212	0.016319	0.003445
NO	NO	NO	NO	NO
! PC -- hardness ratio data
!Time		Err (pos)	Err(neg)	Rate		Error
46950.481	851.866	-890.707	0.733181	0.224164
52349.463	917.122	-797.871	0.590305	0.161579
108402.373	17892.709	-51208.212	0.718402	0.234478