#!/bin/sh
awk -F ':' -v num=$1 -v sec=$2 'BEGIN { nrec=0;}\
/Date:/ {nrec+=1;}\
/Values:/{if (nrec==num){\
     for (i =2;i<=NF;i++) print (sec/(NF-1)*i),$i \
}}'  LightCurves.txt