! Swift/XRT hardness ratio of trigger: 1014012, name: GRB 201221C - source 3
 ! T0 for this burst is Swift MET=630268920.1, = 2020 Dec 21 at 18:41:33.800 UT
 ! The hard band is 1.51-10 keV
 ! The soft band is 0.3-1.5 keV
 ! For details of light-curve production, see Evans et al. 2007, A&A, 469, 379
! There are 3 datasets: Hard, Soft, and the ratio
! Columns are as labelled
READ TERR 1 
READ SERR 2