! 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
32155.561	6601.337	-5193.865	9.134092e-03	2.431446e-03	-2.431446e-03	1.615304e-04	1.631703e-05	0.235952
39199.021	345.166	-442.123	4.436320e-02	1.095525e-02	-1.095525e-02	3.841685e-04	5.927849e-05	1.000000
NO	NO	NO	NO	NO
! PC upper limits
57602.255	65.190	-65.190	9.8344e-02	0.0000e+00	0.0000e+00	4.8711e-05	1.9886e-05	1.0000