Re: [APML] OT: M16 Collaboration

["Richard Crisp" <rdcrisp@earthlink.net>]

----- Original Message ----- 
From: "Robert Gendler" <robgendler@worldnet.att.net>
To: "Wei-Hao Wang" <whwang@gmail.com>; "Discussion of Film Astrophotography" 
<astro-photo@seds.org>
Sent: Wednesday, June 22, 2005 6:47 PM
Subject: Re: [APML] OT: M16 Collaboration


> Hi Wei-Hao,
> The h-alpha was taken in very good seeing. I would think the
> FWHM was probably sub 2" and then with deconvolution
> possibly bringing it close to 1".


which deconv are you using these days, Rob. I seldom use it these days but 
when I do, i've been pretty happy with the results i get with the one in 
AIP4WIN (older edition, probably should upgrade...)

i use the richardson-lucy with triangular or gaussian selected for the PSF. 
I tend to use only two or three cycles though. if I have "thin" data 
sometimes I will run the noise filter before the deconv to avoid the "sand 
grains" background noise problem. it has a nice noise filter




> Rob Gendler
> email: robgendler@att.net
> Web Site: http://www.robgendlerastropics.com
> ----- Original Message ----- 
> From: "Wei-Hao Wang" <whwang@gmail.com>
> To: "Discussion of Film Astrophotography" <astro-photo@seds.org>
> Sent: Wednesday, June 22, 2005 9:22 PM
> Subject: Re: [APML] OT: M16 Collaboration
>
>
> Hi Rob,
>
> Did you measure the FWHM of the stars?
> I guess it's already sub-arcsec.
>
> Wei-Hao
>
> -- 
> ________________________________________________________________
> Wei-Hao Wang  :)
>
> Institute for Astronomy at University of Hawaii
>
> Address:
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> Honolulu, HI 96822             http://www.ifa.hawaii.edu/~wang
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