! Swift/XRT detailed lightcurve of trigger: 21796, name: GRB 250309B/IceCube-250309A - source 10
 ! T0 for this burst is Swift MET=763198746.212 s, = 2025 Mar 09 at 07:38:31.000 UT

 ! Data covers 0.3-10 keV
 ! For details of light-curve production, see Evans et al. 2007, A&A, 469, 379
 ! BINMODE: GRB-like (counts)
READ TERR 1 2
READ SERR 3
!Time    	T_+ve   	T_-ve   	Rate    	Ratepos 	Rateneg 	BGrate  	BGerr   	FracExp
! PC data
67403.409	2845.520	-54199.018	2.453136e-03	1.558825e-03	-1.150759e-03	1.892098e-04	9.930938e-06	0.079468