! Swift/XRT detailed lightcurve of trigger: 21816, name: GRB 250309B/IceCube-250309A - source 22
 ! 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
102800.788	28351.445	-56741.013	4.371423e-03	1.081069e-03	-1.081069e-03	1.699752e-04	7.247767e-06	0.094909
NO	NO	NO	NO	NO
! PC upper limits
135944.919	73.965	-73.965	1.1325e-01	0.0000e+00	0.0000e+00	5.5077e-05	1.9473e-05	1.0000