Syntax:
-fluxtomag mag_constant offset Example 1.$ ./vartools -i Q1_public/kplr000757076-2009166043257_llc.fits \ -readformat 0 1 10 11 \ -fluxtomag 25.0 0 \ -o kplr000757076-2009166043257_llc.asc.txt /datab/jhartman/KeplerData/Q1/Q1_public/kplr000757076-2009166043257_llc.fits
Read in the binary fits Q1 Kepler public light curve for KIC 757076 (not included), convert it to flux using a zero-point magnitude of 25.0, and output the result to an ascii text file.
Fig 1. Example Kepler Light-Curve Converted to Magnitudes, the zero-point is such that a 25th magnitude star produces a count of 1, this does not correspond to the Kepler magnitude of the object.