! Swift/XRT lightcurve of trigger: 21816, name: GRB 250309B/IceCube-250309A - source 17
 ! 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
 ! The data are in 5 columns: ";
 ! time, time error (+ve), time error (-ve), source count-rate, source error
 ! For a detailed description of light curve production, see Evans et al. 2007 (A&A, 469, 379 )
 ! For a detailed description of the file, see
 ! http://www.swift.ac.uk/xrt_curves/docs.php
 ! This lightcurve was obtained from http://www.swift.ac.uk/xrt_curves/00021816
 ! BINMODE: GRB-like (counts)

READ TERR 1 2
! PC data
!Time    	T_+ve   	T_-ve   	Rate    	Ratepos 	Rateneg
74129.456	46726.164	-28069.682	6.168920e-03	1.499850e-03	-1.499850e-03
127420.205	3732.030	-2642.035	2.335327e-03	1.781111e-03	-1.199558e-03