· Get a Cloudy Nights T-Shirt · Submit a Review / Article    Click here if you are having trouble logging into the forums Cloudy Nights - Official Forums of the 2009 International Year of Astronomy Privacy Policy | Please read our Terms of Service | Signup and Troubleshooting FAQ | Problems? PM a Red or a Green Gu.... uh, User   You are not logged in. [Login] Forum Archives · Entrance · Main Index · Search · New user · Who's Online FAQ · Calendar Observing >> Variable Star Observing and Radio Astronomy Previous   Index   Next   Flat   jeffg member Reged: 02/13/07 Posts: 66 Loc: Irvine CA Re: Some rambling, feedback solicited       07/10/09 06:05 PM Attachment (5 downloads) Edit   Reply   Quote   Quick Reply:   While I agree that a cooled CCD is a vast improvement over an uncooled one, my experience is that the DSI-Pro is not quite as bad as you indicate. Adding a fan to the DSI-P helps things considerably. And as you say, using it during the colder months of the year is a good idea. I used a DSI-P for a couple of years prior to upgrading to an SBIG 402 camera. With the DSI-P, the normal dispersions in the data of 8 to 10 Mag variables was about 0.05 mag. The best I every got was around 0.03. That being said I still plan to use the DSI-P for the upcoming Eps Aur campaign since that variable is so bright it tends to saturate the SBIG camera. Attached is a graph of a Landolt Standard star taken with both the SBIG 402 and the DSI-P. You can see the dispersions are much greater with the DSI-P. However, this still means it should deliver pretty good results on brighter variables, especially during the cooler months of the year. And of course, good dark skies always helps (wish I had some). -------------------- Jeff 14", 10", & 4.25" Dobs 8" Schmidt Newtonian, C-8 SC, 8" LSC 6" Cave Student Model A, 6" Dall-Kirkham, 6" RV-6 5" Refractor & 80 mm Folded Refractor Post Extras       Entire thread Subject Posted by Posted on Some rambling, feedback solicited groz 07/03/09 01:53 PM Re: Some rambling, feedback solicited jeffg   07/10/09 06:05 PM Re: Some rambling, feedback solicited groz   07/11/09 03:09 PM Re: Some rambling, feedback solicited groz   07/17/09 01:20 PM Re: Some rambling, feedback solicited groz   08/24/09 11:44 PM Re: Some rambling, feedback solicited walt r   08/25/09 09:38 AM Re: Some rambling, feedback solicited groz   08/25/09 03:32 PM Re: Some rambling, feedback solicited btieman   08/25/09 10:53 PM Re: Some rambling, feedback solicited cflrich   07/03/09 06:44 PM Re: Some rambling, feedback solicited jgraham   07/03/09 03:01 PM Re: Some rambling, feedback solicited btieman   07/03/09 06:04 PM Re: Some rambling, feedback solicited groz   07/05/09 06:00 PM Re: Some rambling, feedback solicited gavinm   07/05/09 09:11 PM Re: Some rambling, feedback solicited groz   07/07/09 05:17 PM Re: Some rambling, feedback solicited cflrich   07/07/09 07:50 PM Re: Some rambling, feedback solicited brianb11213   07/08/09 05:00 AM Extra information 1 registered and 0 anonymous users are browsing this forum. Moderator:  RLTYS  Forum Permissions       You cannot start new topics       You cannot reply to topics       HTML is disabled       UBBCode is enabled Rating: Thread views: 506 Jump to *International Year of Astronomy 2009* -----   Global Coordination   Cornerstone Projects   Special Projects   Special Task Groups   Global Activities   National and Regional Activities   IYA 2009 in Africa   IYA 2009 in the USA*Announcements and News* -----   Cloudy Nights Announcements   Discussion of CN Articles, Reviews, and Reports   Beginners Forum   Celestial Events   Light Pollution*Equipment Discussions* -----   ATM, Optics and DIY Forum   Binoculars   Binoviewers   Cats & Casses   Classic Telescopes   Equipment   Eyepieces   Mounts   Observatories   Reflectors   Refractors    Celestron SkyScout and Meade mySky   Video and Electronically Assisted Astronomy*Astrophotography and Sketching* -----   Beginning and Intermediate Imaging   Film Astrophotography   DSLR & Digital Camera Astro Imaging & Processing   CCD Imaging & Processing   Solar System Imaging & Processing   Sketching   Astro Imaging/Sketching Contest *Observing* -----   NEO   General Observing   Planetary and Solar System Observing   Lunar Observing   Deep Sky Observing   Double Star Observing   Solar   Variable Star Observing and Radio Astronomy*Telescope Specific Forums* -----   Celestron NexStar    NexStar GPS / CPC Telescopes   Questar Forum   Meade ACF/RCX / LX / GPS    Meade ETX*Other* -----   Science of Astronomy & Space Exploration   AstroWebsites   Space Rocks*Speciality Forums* -----   AstroArt   Astronomy Software & Computers   Stellar Media   Astro Outreach, Clubs and Star Parties*CN Feedback and Vendor Announcements* -----   Vendor and Group Announcements CN Forums Home

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