NGC2359 Thor's Helmet in [SII], Ha and [OIII] Light

Click image to enlarge

[SII] = Red, Ha = Green, [OIII] = Blue

Taken January (3, 20-22), 2004 from my backyard in Castro Valley, Ca.

C14 imaging scope @4430mm focal length (f/12.46) stabilized with mirror locks and with camera angle adjuster

FLI IMG1024S imaging camera @ -40C

SBIG AO7 Adaptive Optics System

SBIG ST7E Guide/AO control camera @-20C

RCOS Dichroic Beam Splitter for AO7/IMG compatibility

FLI CFW 1 filter wheel

Custom Scientific Narrowband Emission Line Filter

   [Sulfur II]                     672.4nm  3nm FWHM

   Hydrogen alpha        656.3nm  3nm FWHM 

   [Oxygen III]                 500.7nm 3nm FWHM   

Exposure details:

3 exposures of 20 minutes for Halpha

5 exposures of 20 minutes for [SII]

5 exposures of 20 minutes for [OIII]

4 hours 20 minutes  total exposure time

Maxim DL used for IMG1024S control

CCDSOFT 5.00.71 used for AO7/ST7E control

Sigma prebeta 11 used for darks, flats, biases and light combine

SGBNR used for smoothing

Photoshop CS used for final touch up


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