How do you subtract your master bias info from your master dark?

[mcbbcn]

Hi,

What is the process for subtracting your master bias information from your master dark outside of the Image Calibration menu?  I'm asking because there is a pretty cool batch processing script to do all the calibration, registration & alignment in one go, but I don't believe it has a "calibrate checkbox" as you get in the image calibration, but I don't want to do an image calibration against lights in the image calibration menu, I just would like to have a Master Dark that has the Master Bias already subtracted.

Any thoughts?

Thank you,

Miquel

[Enzo De Bernardini]

Hi Miquel,

I think you're looking for PixelMath. Try MasterDark - MasterBias (with the corresponding IDs)

Greetings,

Enzo.

[astropixel]

Load your bias and darks into the BP script and select calibrate only.

[mcbbcn]

Thank you both!  Great tips!