! Swift/XRT lightcurve of trigger: 20729, name: GRB 170121B - source 2
 ! 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
 ! 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/00020729
 ! BINMODE: GRB-like (counts)

READ TERR 1 2
! PC data
!Time    	T_+ve   	T_-ve   	Rate    	Ratepos 	Rateneg
129405.563	6530.539	-5394.559	1.107337e-02	2.544261e-03	-2.544261e-03
143832.330	3542.975	-1546.163	8.438282e-03	3.193527e-03	-2.550098e-03