Celestial hemisphere:  Southern  ·  Constellation: Cetus (Cet)  ·  Contains:  M 77  ·  NGC 1068
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M77 with Supernova 2018inc, wadeh237
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M77 with Supernova 2018inc

Getting plate-solving status, please wait...
M77 with Supernova 2018inc, wadeh237
Powered byPixInsight

M77 with Supernova 2018inc

Equipment

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Acquisition details

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Description

This is M77, a barred spiral galaxy in Cetus.

It was taken from Snohomish, WA between 12/03/18 and 12/06/18. It features Supernova 2018inc.

The equipment used was as follows:

Celestron EdgeHD8 at F/7 with Celestron reducer.

ZWO ASI1600MM-cool camera with Astrodon Gen2 RGB filters.

Astro-Physics AP1100GTO-CP4

Exposures were 25x180 seconds red, 25x180 seconds blue and 25x180 seconds green at gain 76, offset 40. Processing was done in PixInsight.

Conditions were not great for this one. Although it was clear, the transparency was not great. There was significant noise in the faint parts of the image, so I took the opportunity to spend a good amount of time with various PixInsight noise reduction processes. Ultimately, I settled on dealing with noise in the linear state on each channel individually, and only combining them after initial noise reduction and gradient removal. I used MultiscalMedianTransform on the linear data, and did a final noise reduction with TGVDenoise on the non-linear combined data near the end of processing.

I think that the image is a bit soft, and I think that this is because seeing was somewhat variable during the time that I imaged. I threw out the softest subexposures and kept the best 25 of each channel. I would have preferred to image this galaxy at a longer focal length, either with the Edge8 at F/10, or perhaps through the C14. Stretches of clear weather are pretty unusual in early December, though, so I had to use the gear that was already set up and ready to go.

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M77 with Supernova 2018inc, wadeh237