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AIP4Win does allow you to set the inner sky annulus. However it does have some problems with centroiding: I've noticed they show up particularly if you're using it on moving objects, as you might expect. This may give rise to the problems described in this thread. I find MaxIm far better in this regard. Tom Richards > (fwd) problems with AIP4win > > The following message is from Marc Bos in response to my finding. > Forwarded here with permission. He is now on these lists, > and follow-up > message to these lists will reach him. > > === > > Normally I don't follow the discussions on VSnet but your > comments about > AIP4Win were forwarded to me . I have also found problems with this > software and therefor don't use it . I prefer DAOPHOT II in > the form of > Munipack 2 by Rudolf Novac and his collaborators. When comparing the > output of both these packages I find that the scatter in the > comparison > data is consistently higher for AIP4Win by about 40% . Part of the > problem could be that AIW4Win dose not allow one to set a > value for the > inner sky annulus, so effectively you could be including some of the > stars light in the sky back ground subtraction. Also, how dose the > software deal with fractions of pixels, hot pixels and stars > in the sky > annulus .I know that DAOPHOT dose it very well. Just some thoughts on > the matter. I'll keep using DAOPHOT untill something better > comes along > but I can't see that happening in a hurry. > > Kind regards > Mrac Bos > > Mt Molehill Observatory > Otahuhu, AKL > New Zealand >
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