! Swift/XRT detailed lightcurve of trigger: 21739, name: GRB 241209B - source 2
 ! T0 for this burst is Swift MET=755409414.685 s, = 2024 Dec 09 at 03:56:20.000 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