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Posts Made By: Dennis Persyk

November 4, 2004 01:20 AM Forum: CCD Imaging and Processing/Solar System

Sh2-101Reprocessed

Posted By Dennis Persyk
There were four bright stars that were bloated considerably in my image of Sharpless 2-101. I applied a minimum filter in PhotoShop and was able to tame the obnoxious stars a bit. The original and reprocessed images are at
http://home.att.net/~dpersyk/new.htm

I ordinarily do not like to apply such processing steps to an astro image, but in this case I felt it was justified to correct an obvious defect introduced by the optics and my acquisition method.

I’d like to hear your views on alterations like these: Are they justified or is this too much of a processing modification? How do you handle blooming stars?

Thank you for visiting my site.

Clear skies,

Dennis Persyk
Igloo Observatory Home Page http://dpersyk.home.att.net
Hampshire, IL




November 8, 2004 02:41 AM Forum: CCD Imaging and Processing/Solar System

Intense Aurora Display Nov 7

Posted By Dennis Persyk
There was a very beautiful, intense aurora display over Northern Illinois on the night of Nov 7.

Images at
http://home.att.net/~dpersyk/new.htm

Thank you for visiting my site.

Clear skies,

Dennis Persyk
Igloo Observatory Home Page http://dpersyk.home.att.net
Hampshire, IL





November 9, 2004 04:43 PM Forum: CCD Imaging and Processing/Solar System

Comet C/2004 Q1 Tucker

Posted By Dennis Persyk
I have a new web page illustrating the comet, its orbit, eyepiece view and a short movie of its 1.8 arc minute journey through Andromeda. Don’t miss the movie (rated G)!

Images (modem-friendly) at
http://home.att.net/~dpersyk/new.htm

Equipment: Takahashi E160 f/3.3 astrograph, AP1200GTO, and MX716 camera

Thank you for visiting my site.

Clear skies,

Dennis Persyk
Igloo Observatory Home Page http://dpersyk.home.att.net
Hampshire, IL


November 19, 2004 07:21 PM Forum: CCD Imaging and Processing/Solar System

A Piece of the Pelican

Posted By Dennis Persyk
IC 5070, the “Pelican” Nebula, is a large red nebula in Cygnus. I imaged a piece of it with my E160 f/3.3 astrograph and MX716 camera. The nebula subtends 60 x 50 arc minutes and my FOV was only 42 x 31 arc minutes.

I deftly steered the scope so as to exclude a pair of really bright stars – magnitudes 4.8 and 5.1. Bright stars always give me trouble by becoming really bloated. LRGB image with 120 minutes total, in 5-minute unguided segments. AP1200 GTO unguided, True Technology Micro Filter holder and filters.

Image at
http://home.att.net/~dpersyk/new.htm

Thank you for visiting my site.

Clear skies,

Dennis Persyk
Igloo Observatory Home Page http://dpersyk.home.att.net
Hampshire, IL




November 28, 2004 04:19 PM Forum: CCD Imaging and Processing/Solar System

NGC 7000 One-Shot Color vs. RGB

Posted By Dennis Persyk
I am fortunate to have on loan to me two StarlightXpress cameras, the SXV-H9 and SXV-H9C. They are identical except that the H9 is monochrome and the H9C is one-shot color. I have been experimenting with both on the same scope/piggyback camera lens and targets.

On my New Images page I illustrate the images I obtained with the two cameras using a $40 used Pentax 50 mm lens at f/5.6. One is one-shot color, the other is RGB, Take a look at the comparison images and draw your own conclusions.

Comparison images at
http://home.att.net/~dpersyk/new.htm

My sincere thanks to Jeff Terry http://mrmac.mr.aps.anl.gov/~astronut/ for the loan of the cameras and for initial processing the H9C image with his custom Mac software http://www.iccd.us/ .

Thank you for visiting my site. Feedback always welcomed.

Clear skies,

Dennis Persyk
Igloo Observatory Home Page http://dpersyk.home.att.net
Hampshire, IL




December 5, 2004 07:53 PM Forum: CCD Imaging and Processing/Solar System

NGC 7000 One-Shot Color vs. RGB

Posted By Dennis Persyk
Since my initial web page came out a week ago, Terry Platt, manufacturer of StarlightXpress cameras, offered to process the images taken with the SXV-H9C. When Terry processes them, the differences between the H9 RGB and the H9C one-shot are lessened.

I now display 3 images: H9 RGB, and H9C one shot color, the H9C processed by two different imagers. Please take a look.

Comparison images at
http://home.att.net/~dpersyk/new.htm

Thank you for visiting my site. Feedback always welcomed.

Clear skies,

Dennis Persyk
Igloo Observatory Home Page http://dpersyk.home.att.net
Hampshire, IL




December 9, 2004 08:23 PM Forum: CCD Imaging and Processing/Solar System

(OT) Bad Weather Imaging

Posted By Dennis Persyk
The past two months have yielded only a couple of nights of clear skies, so I have turned to alternative imaging targets. Please take a moment to look at my non-astro images at
http://home.att.net/~dpersyk/new.htm

I promise to post some astroimages when (I am optimistic) clear skies return.

Thank you for visiting my site. Feedback always welcomed.

Clear skies,

Dennis Persyk
Igloo Observatory Home Page http://dpersyk.home.att.net
Hampshire, IL





December 14, 2004 07:59 PM Forum: CCD Imaging and Processing/Solar System

Comet C/2004 Q2 Machholz

Posted By Dennis Persyk
I have a new web page illustrating the comet, isophotes, finder chart, orbital plot and a short, modem-friendly movie.

E160 at f/3.3, MX716, 30 x 2 minutes.

Images and supporting data at
http://home.att.net/~dpersyk/new.htm

Thank you for visiting my site.

Clear skies,

Dennis Persyk
Igloo Observatory Home Page http://dpersyk.home.att.net
Hampshire, IL







December 18, 2004 05:37 PM Forum: CCD Imaging and Processing/Solar System

Q2 Machholz with a 1 Degree Tail

Posted By Dennis Persyk
Our currently brightest comet has undergone significant changes in the past week. I have captured a 1 degree long tail in my mosaic at

http://home.att.net/~dpersyk/new.htm

Finder chart and simulated eyepiece view is also provided – please take a look.

Thank you for visiting my site.

Clear skies,

Dennis Persyk
Igloo Observatory Home Page http://dpersyk.home.att.net
Hampshire, IL







December 25, 2004 08:21 PM Forum: CCD Imaging and Processing/Solar System

Comet 78P Gehrels 2nd Brightest in the Sky

Posted By Dennis Persyk
The current rage is Q2 Machholz but I chose to image 78P Gehrels. It is the 2nd brightest comet in the sky now at magnitude 10.7 .

Finder chart, isophotes, image and supporting data at
http://home.att.net/~dpersyk/new.htm

Thank you for visiting my site.

Clear skies,

Dennis Persyk
Igloo Observatory Home Page http://dpersyk.home.att.net
Hampshire, IL






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