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I am attempting to remove stars from an image using the DAOPHOT package. Specifically, I have stars with saturated pixels overlaying the image of a galaxy. I want the galaxy to remain but the stars subtracted out.My analysis procedure includes the following:1. DAOFIND
2. PHOT
3. PSTSELECT
4. PSF
5. ALLSTAR (or, alternatively, PEAK and then NSUI have toggled the daopars:saturat parameter to "yes", but with no effect. The saturated pixels are not affected by the subtraction at all.I also tried increasing datapars:datamax parameter to a value higher than the pixel saturation value. As expected, this did cause parts of the star to be subtracted out, but the residual is still considerable.Any thoughts?Thank you,Douglas W. Shields
Graduate Student
University of Arkansas

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Douglas W. Shields Graduate Student Department of Physics University of Arkansas, Fayetteville

I don't think there is a specific way to do this that works or is part of an IRAF package. The only suggestion, provided you are not having to do a very large amount of data, is to look at the IMEDIT task. However that only allows you to cosmetically replace data, usually from a nearby region.Note that technically you cannot recover any real science flux under the staturated part of the star since the observed counts are no longer linear when saturated.Frank Valdes