Contains: M 31, Great Nebula in Andromeda, NGC 224, M 32, NGC 221, M 110, NGC 205, The star νAnd, The star 32And
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Andromeda's Halo, IFN, and Stellar Stream(s) - LHa(HaR)GB

Technical card

Imaging telescope or lens: Takahashi FSQ106EDX

Imaging camera: FLI Ml 16803

Mount: Astro-Physics Mach 1 GTO

Guiding telescope or lens: Celestron Finderscope 9x50

Guiding camera: Orion SSAG

Focal reducer: Takahashi .73X Reducer QE

Software: Main Sequence Software Sequence Generator ProPixInsight

Filter: Astrodon E-series Lum

Accessory: FLI CFW-4-5 50mm Square

Resolution: 4048x3806

Dates: Oct. 5, 2013

Frames: Astrodon E-series Lum: 8x900" -20C bin 1x1

Integration: 2.0 hours

Avg. Moon age: 0.47 days

Avg. Moon phase: 0.26% job: 306560

RA center: 10.581 degrees

DEC center: 41.342 degrees

Orientation: -4.474 degrees

Field radius: 3.632 degrees


I've always known about Andromeda's extended halo, but to what extent Andromeda stretched out was of exciting news to me.

Last year I had processed a 9 hour image of Andromeda (2 hours in Lum, 2 hours in Ha and 1h 40m of each in RGB) and had noticed some structure in the Ha band that got me a little excited because I had not seen it present in other amateur images. This year I decided to reprocess the data starting with the Luminance and to my surprise I noticed faint underlying structure. My first reaction was a poor calibration or poor gradient removal via PixInsight's DBE because it was significant.

I went ahead and processed and after inverting the image I could clearly see some structure. My posting on CloudyNight's CCD forum confirmed that it was in fact structure (Thank you, Hiro, Leonardo, Mike and Rob [aka pfile]) and my excitement grew further.

Here is my luminance data and trying to get a proper colour image sorted out, but not having much luck ... I'm not very good with LRGB work.

- luminance process

Revision B:
- inverted and exaggerated the stretch to highlight structures

Revision C:
- combination of my original Andromeda and my latest... much better, but still not quite there. Happy ... for now ;)




Sky plot

Sky plot


Andromeda's Halo, IFN, and Stellar Stream(s) - LHa(HaR)GB, Hytham