Where has "Normalise OSC Flat" gone.

Stacking program, astrometric (plate) solver, fits file viewer

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Where has "Normalise OSC Flat" gone.

Forum: General discussions ASTAP

Creator: Phil Crompton

Created: 2023-09-05

Updated: 2023-09-05

Phil Crompton - 2023-09-05

Hi Han,

I am getting the warning "Warning flat pixels differ too much ..." using LED panel for creating my flats. Looking through here I was reminded to use "Normalise OSC Flat" but that seems to have gone. I am using version 2023-07-05.

I have attached a sample flat file.

What should I do about the warning message?

Regards,

Phil

2023-09-04_-3.40_0.12s_0025.fits

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han.k - 2023-09-05

Hi,

In the new version the normalising is always done. The warning indicates that one channnel probably red sensisitive is only 50% exposed up to about 11600 compared of the other channels green and blue (25000). It doesn't really matter if the are all reasonable exposed. Theoretical you will have a tiny amount of more flat noise in that channel but that can be compensated by more flats.

So nothing to worry about. No actions are required.

See attached histogram

Han

Untitled.png

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Phil Crompton - 2023-09-05

Hi Han,

Thanks for the quick response and the explanation.

Phil

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