! Swift/XRT lightcurve of trigger: 21427, name: GRB 210406A - source 3
 ! T0 for this burst is Swift MET=639421908.9 s, = 2021 Apr 06 at 17:11:22.000 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/00021427
 ! BINMODE: GRB-like (counts)

READ TERR 1 2
! PC data
!Time    	T_+ve   	T_-ve   	Rate    	Ratepos 	Rateneg
204796.752	39629.222	-35158.810	1.284146e-03	7.549412e-04	-5.576010e-04