comet processing : how to remove stars and not comet nucleus?

[christian viladrich]

Hi,

I have a question about the use of "Filter/Stars/Remove stars" for comet image processing.

I would like to remove stars from a set of images, in order to keep only the tail and coma of the comet.

The problem I have, is that the nucleus of the comet is identified as a star by the "star find". So it is removed in the process.

Is there a way, or could it be a way in the future, to be able to use a "mask" to restrict the filter Stars/Remove stars to areas outside the "mask" ?

The "mask" would define an area (probably circular or better elliptic) around the coma. Its position X, Y could remain the same for the whole set of images (since there are already registered on the stars). And the "Stars/Remove stars" filter would apply only outside the region defined by the "mask".

If there is a way to do something like this in AstroArt, I would be interested to know how to do it.

Thanks !

Christian

[fabdev]

Hi, usually there is no need to delete the stars, they are automatically deleted by stacking on the comet with Sigma stacking. Here is an example:
viewtopic.php?f=4&t=323&p=1888&hilit=mask#p1199
Fabio.