! Swift/XRT detailed lightcurve of trigger: 20729, name: GRB 170121B - source 3
 ! Swift/XRT lightcurve of trigger: 20729, name: GRB 170121B - source 3
 ! T0 for this burst is Swift MET=506702662.0 s, = 2017 Jan 21 at 14:44:03.503 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
137307.989	6449.964	-13296.985	9.028605e-03	1.908253e-03	-1.908253e-03	1.785023e-04	1.131213e-05	0.232612
NO	NO	NO	NO	NO	NO
! PC Upper limit
147063.146	312.159	-36.356	5.0779e-02	0.0000e+00	0.0000e+00	1.6693e-04	3.3385e-05	1.0000