Andromeda Galaxy (M31), H alpha-enhanced
|Object(s): M31, M32, M110
||Coordinates: RA0h43.5min, DEC41°20.3min
|Telescope: TV-85 at f/5.6
||Camera: Parsec 8300M
||Exposures: 43x1000s H alpha; 30x500sR, 17x500sG, 28x500sB
|Location: my back yard, Quadeville Road
||Date(s): August-September, 2011; August-September, 2012
||FOV: 130x100 arcmin
|Notable images: Gendler
My goal for this project was to produce a very low-noise image, and use an H alpha channel to reveal the emission clouds in the galaxy's spiral arms.
To do this, I subtracted the continuum red data from an H alpha image, which with further processing (including cloning away all stars) was dominated by the emission clouds and the galaxy's bright
core, which apparently emits quite a bit of H alpha as well. Because this process would inevitably result in a very low dynamic range, and hence be easily spoiled by noise, the
H alpha image needed to
be very deep: 43x1000s! The result was just good enough to be useful.
I think this object would
benefit from a luminance layer, which I may capture and add later.
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