Andromeda Galaxy Mosaic From The Cabin (Carl)

Celestial hemisphere: Northern · Constellation: Andromeda (And) · Contains: Andromeda Galaxy · M 110 · M 31 · M 32 · NGC 205 · NGC 206 · NGC 221 · NGC 224

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Andromeda Galaxy Mosaic From The Cabin

Revision title: Reprocess With Darks

Powered byPixInsight

Andromeda Galaxy Mosaic From The Cabin

Revision title: Reprocess With Darks

Hot, broadband summer continues from the cabin with a two-panel mosaic of the Andromeda Galaxy! M31 has long been a benchmark target for me. I return to it year after year to gauge my progress. Last year, I posted a collage of all my Andromeda images on Instagram. This year I am proud to add my best rendering yet! Bortle 3 skies make broadband imaging a breeze. I used roughly 3x more luminance than RGB, which I am now convinced is the best way to image broadband after watching the PI tutorial on LRGB combination. I firmly hold this conviction until another video tells me otherwise.

Anyways. Each panel got roughly the same amount of exposure time. The Photometric Mosaic script in PI made short work of stitching everything together. Some friends pointed out the shortcomings of Automatic Background Extractor on this kind of target. I am not one to fuss too much over gradient removal, but in this case it was worth it to go back with a few points in DBE and come out with a smoother image.

Original
Final
B

B

Title: Reprocess With Darks

Description: I was without my usual Dark Library when I first processed this. Back home, I reprocessed my data from scratch, calibrated with my 120s dark master. I could definitely see the ASI1600MM's amp glow on the edges of the original. The darks nicely calibrated that out, but I couldn't quite get the colors as satisfying as the original. I can't decide which I like better, but once I saw the amp glow, I had to get rid of it.

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Status	Advanced success
Started	...
PixInsight job	MC83XOIZHZ8LHUJ8LU1F0TAKC8GGCZWJ
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	00h42m49s.42
RA (top/left)	00h37m30s.55
RA (top/right)	00h48m11s.90
RA (bottom/right)	00h48m22s.47
RA (bottom/left)	00h37m13s.54

Dec (center)	+41°15′42″.1
Dec (top/left)	+39°50′19″.3
Dec (top/right)	+39°50′42″.6
Dec (bottom/right)	+42°40′07″.6
Dec (bottom/left)	+42°39′43″.4

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Andromeda Galaxy Mosaic From The Cabin

Revision title: Reprocess With Darks

Andromeda Galaxy Mosaic From The Cabin

Revision title: Reprocess With Darks

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Andromeda Galaxy Mosaic From The Cabin

Revision title: Reprocess With Darks

Andromeda Galaxy Mosaic From The Cabin

Revision title: Reprocess With Darks

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