Core of the Andromeda Galaxy (Vitali)

Celestial hemisphere: Northern · Constellation: Andromeda (And) · Contains: Andromeda Galaxy · M 31 · NGC 224

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Core of the Andromeda Galaxy

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Core of the Andromeda Galaxy

Yesterday I tested a new version of Voyager and this required starting early in the evening. However the Moon was already too bright to do any serious imaging, so I've tried to image a bright object: the core region of the Andromeda Galaxy.

Hubble images show dark structures around the core:

Messier 31 (The Andromeda Galaxy)

Zoomable image

I wanted to see whether they will be visible with my setup. The integration time is 1 hour 45 minutes, which is relatively short. So the image is rather noisy. Nevertheless the dark structures are easy to see. PixInsight's HDRMultiscaleTransform process helped to reveal them.

Revision A is a 2x downsampled image.

Revision B is a full resolution image. I've used the Revised Bologna Catalogue of M31 globular clusters and candidates: RBC (V.5, August 2012) to label the globular clusters (GC) and some other objects.

Revision C shows the core of the galaxy. The image is the original synthetic luminance without stretch and any other post-processing.

Comments are welcome.

Vitali

Original
B
C
F
Final
G

B

Description: Annotated.

Uploaded: ...

C

Description: The core. Unprocessed. Upscaled 4x.

Uploaded: ...

F

Description: Experimental PixInsight workflow. AutoColor script for color calibration.

Uploaded: ...

G

Description: PixInsight experiments. I've rotated the image in order to get a view from top, i.e. the nearest side of the galaxy is now at the lower part of the image. I believe that this is the nearest side because the dark dust lanes are much more prominent and less obscured there, including the core region. Also I've tried to create a depth of field effect by using a gradient mask for sharpening the nearest part and convoluting the far side. However I'm not sure if it works :)

Uploaded: ...

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Status	Advanced success
Started	...
Astrometry.net job	4128529
PixInsight job	KJZYZEQI2D96VCBFM2RAK004ZT2DS377
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	00h42m46s.655
RA (top/left)	00h41m33s.789
RA (top/right)	00h43m59s.999
RA (bottom/right)	00h43m59s.999
RA (bottom/left)	00h41m33s.157

Dec (center)	+41°14′58″.57
Dec (top/left)	+41°06′07″.66
Dec (top/right)	+41°06′12″.80
Dec (bottom/right)	+41°23′46″.85
Dec (bottom/left)	+41°23′41″.39

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Core of the Andromeda Galaxy

Core of the Andromeda Galaxy

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Image Index:

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Core of the Andromeda Galaxy

Core of the Andromeda Galaxy

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