! Swift/XRT detailed lightcurve 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

 ! 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
46481.264	240.442	-421.491	6.617573e-02	1.731007e-02	-1.731007e-02	2.917143e-04	5.416999e-05	1.000000
46972.670	260.529	-250.964	8.409778e-02	2.189926e-02	-2.189926e-02	2.473360e-04	5.674278e-05	1.000000
47402.032	400.315	-168.833	7.747530e-02	2.027492e-02	-2.027492e-02	3.509696e-04	6.407798e-05	1.000000
51758.791	196.479	-207.199	6.132579e-02	1.605585e-02	-1.605585e-02	5.111752e-04	9.180978e-05	1.000000
52083.140	190.560	-127.869	7.402976e-02	1.931216e-02	-1.931216e-02	4.807930e-04	1.002523e-04	1.000000
53661.174	4006.866	-1387.475	4.716899e-02	8.116159e-03	-8.116159e-03	7.676313e-04	5.904856e-05	0.271908
120019.489	836.131	-883.877	2.950438e-02	7.993486e-03	-7.993486e-03	4.083564e-04	3.985150e-05	1.000000
125468.425	826.657	-690.259	1.919515e-02	4.397582e-03	-4.397582e-03	3.149881e-04	3.792012e-05	1.000000
131655.796	4363.089	-1411.210	2.168574e-02	5.545021e-03	-5.545021e-03	3.366818e-04	4.714489e-05	0.182805