RGB = [SII], Ha, [OIII]
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RGB = Ha, [OIII], [SII]
Click on image to enlarge. For maximum resolution, click here
Click on image to enlarge. Click here for maximum resolution
Halpha only
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Taken on October 24-26, 2003 in my backyard in Castro Valley, Ca.
Astro-Physics Traveler f/6 with Astro-Physics 0.75X Telecompressor (F=457.5mm total, f/4.5)
SBIG ST10XME Imaging Camera at -22deg C.
Astro-Physics 800mm guidescope (F=900mm)
SBIG ST7E guider camera
Astro-Physics AP1200GTO mount
Finger Lakes Instrumentation DF2 Digital Focuser
Finger Lakes Instrumentation CFW1 Filter Wheel
3 exposures of 20 minutes through Ha and [SII] filters at two sites for 2 x 1 mosaic
2 exposures of 30 minutes through [OIII] filter at two sites for 2 x 1 mosaic
1 exposure of 20 minutes through [OIII] filter at two sites for 2 x 1 mosaic
Custom Scientific Narrowband Emission Line Filters
[Sulfur II] 672.4nm 3nm FWHM
Hydrogen alpha 656.3nm 3nm FWHM
[Oxygen III] 500.7nm 3nm FWHM
Total exposure = six hours 40 minutes
Maxim 3.20 used for image capture, calibration, ddp, alignment, format conversion and color combining
Sigma pre-beta 11 used for darks, biases, flats
AIP4WIN used for deconvolution
Photoshop 7 used for mosaic tiling and final adjustments