Arkadasim Rick Krejci'nin 5 Temmuz 2008'de goruntuledigi "Fireworks" gok adasi (NGC6946) goruntusunu ve Rick'in teknik bilgilerini ve yorumunu gonderiyorum.
Rick bu inanilmz goruntuyu cekmek icin 3 saaten fazla calisti.
Gule gule kullanin.
Timur
Being the 4th of July weekend, with a super clear night with no moon (how often does that happen here!), I decided to try a galaxy I've not tried before...NGC6946, which happens to be nicknamed the Fireworks Galaxy.
Not sure why I'd not noticed this gem, but the Ha regions are more abundant than I'd seen in a galaxy before (thus the name!). To do it justice, I added some Ha data to the red channel to show it off a little more.
I had some issues with the guide camera, so I wound up going unguided.
Even unguided, with great seeing and the great NJP mount, I was
getting around 2 arcsec FWHMs and nice round stars...a great night!
Rick Krejci
Date: 7/5/2008
Location: Ada, MI
Optics: 10" f/5 Swayze Optics Newtonian w/ MPCC coma corrector
Mount: Tak NJP
Camera: Starlight Xpress SXV-H9
Exposure: L(R,Ha)GB L=66x1min unbinned, RGB=15x2 unbinned, Ha=9x4min 2x binned, Astrodon (192minutes total) - all unguided
Note: Captured, no darks, no flats, aligned, SDMask combined, RGB combined in MaximDL. Luminance Layering, Ha Red channel enhancement and Final Processing in PS CS2.
http://www.astronomy2009.org/
