Cassiopeia A

exposed at 02.08 and 22.08.2011

Canon Eos 400D overview simultaneous with the CCD picture

50 % croop from original Canon Eos 400D picture with 100mm f/2 ( f 3.5) fotolens

Canon Eos 400D croop

Atik 383L+ CCD Picture with 12 " Newton

50 % croop from original CCD picture

comparison with POSS II and Hubble Picture

animation Balkonsternwarten picture with the POSS II and Hubble pictures

animation Balkonsternwarten picture with the POSS II picture (14 years between the pictures)

animation Balkonsternwarten picture with the Hubble pictures (7 years between the pictures)

camera : Canon Eos 400D mod. and Atik 383L+
lens: Canon 100mm f/2 fotolens and 12 " Newton f/4 (Baader RCC 1 corrector)
filter : Baader LRGB
exposure software : Astroart 4.0
guiding: OAG with Mintron MTV-12V6HC-EX and Guidemaster

exposure time :

Canon Eos : 15 x 3 min f / 3.5 ( 45 min total )

CCD LRGB
L : 20 x 10 min ( 3 hours and 20 min)
R : 3 x 15 min ( 45 min / 2x2 bin )
G : 3 x 15 min ( 45 min / 2x2 bin )
B : 3 x 15 min ( 45 min / 2x2 bin )
total: 5 hours and 35 min

location : Home observatory Leopoldshöhe
image processing : Fitswork (image addition, Flat correction) / Regim (color calibration and Background processing) / PS CS3 (final processing)
spezifics : L-channel good seeing but moon

here you can find a good articel:

German:
http://de.wikipedia.org/wiki/Cassiopeia_A

English:
http://en.wikipedia.org/wiki/Cassiopeia_A