! Swift/XRT lightcurve of trigger: 21638, name: GRB 231220A - source 1
 ! T0 for this burst is Swift MET=724781449.584 s, = 2023 Dec 20 at 16:10:44.584 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/00021638
 ! BINMODE: GRB-like (counts)

READ TERR 1 2
! PC data
!Time    	T_+ve   	T_-ve   	Rate    	Ratepos 	Rateneg
38993.342	550.845	-617.557	4.214301e-02	8.755313e-03	-8.755313e-03