In the following example, multiple faint object exposures are summed and divided by an A type star exposure. Given an A type star (tspec0048) and a set of exposures tspec0049, tspec0050 to tspec0053, first reduce all the data:
tsx tspec0048 tspec0047 -autox tsx tspec0050 tspec0051 -autox tsx tspec0051 tspec0050 -autox tsx tspec0052 tspec0053 -autox tsx tspec0053 tspec0052 -autox
Then add up the faint objects:
tsxop add tspec0050 tspec0051 tspec0052 tspec0053 result=ngc2419s1814 -plot
Then divide by the A star:
tsxop div ngc2419s1814 tspec0048 result=ngc2419s1814_div col=sum col2=VsumD -plot
This tells 'tsxop' to divide column 'sum' in 'ngc2419s1814' by column 'VsumD' in 'tspec0048'. The column 'VsumD' is the same as 'sum' but with Paschen line corrections using a Vega calibration spectrum.