! Swift/XRT detailed 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
 ! 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
38993.342	550.845	-617.557	4.214301e-02	8.755313e-03	-8.755313e-03	3.574722e-04	4.693840e-05	1.000000