The Crab Nebula (Deep Space Photons)

Celestial hemisphere: Northern · Constellation: Taurus (Tau) · Contains: Crab nebula · M 1 · NGC 1952

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The Crab Nebula

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The Crab Nebula

After about a year I am finally getting back into AP. I had computer issues, and I am still working out issues with capturing data with an old old old MacBook running windows.

But I built a PC for processing, which is nice it no longer takes a full day just to pre-process!

I started M1 before all the PC issues and restarted it on 12-19. I was able to add the old data after version A. I had a ton of hot pixels with my data and assumed my darks were just too old. But I found with new darks there was still a lot of hot pixels. I guess I need to dither more and further. I found linear fit clipping didn't remove them but winsorized sigma did. Weird. Anyways I had some focusing issues, the latest SGP does seem to work better but is still slow and I need to do a better job nailing down backlash issues.

It's been so long I really had to relearn how to do all of this!

I wish I had a cleaner better M1 to show for it, but this is an ok image I guess. I might add more to it but I also kind of want to use my SV80. We'll see.

*Pixel scale is actually 0.69"/px. Drizz and resize.

E

Description: Just upped the brightness and contrast a little.

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Distribution of astrophotographers

This table shows the number of distinct astrophotographers who have been assigned and IOTD/TP award compared to the total number of images awarded.
	Distinct awarded users	Total awarded images
Image of the day
Top picks
Top pick nominations

Distribution of subject types

This table shows the distribution of awards per subject type, compared to the popularity of images of that subject type.
	Image of the day	Top pick	Top pick nominations	Total submitted
Deep sky
Solar system
Extremely wide field
Star trails
Northern lights
Noctilucent clouds
Landscape
Artificial satellite

Distribution of data sources

This table shows the distribution of awards per data source, compared to the popularity of images acquired from that data source.
	Image of the day	Top pick	Top pick nominations	Total submitted
Backyard
Traveller
Own remote observatory
Amateur hosting facility
Public amaeteur data
Professional, scientific grade data
Mix of multiple sources
Other
Unknown

The “AstroBin Image of the Day and Top Picks”, or IOTD/TP, is a long-running system to promote beautiful, interesting, peculiar, or otherwise amazing astrophotographs, with a focus on technical excellence. Learn more.

Submitted The date and time when you submitted this image for IOTD/TP consideration.	...
Views by Submitters (available since September 19th, 2023) Every image is assigned to 50% of available Submitters. In the event that at least 80% of them don't view the image before its time in the IOTD/TP process expires, it's assigned to the other 50% of Submitters and the process begins anew.
Promotions by Submitters When 3 distinct Submitters promote the image, it moves on to the next stage of the process: evaluation for Top Pick status. This requirement, in addition to anonymization of images and distribution to only a subset of them, prevents biases and ensures that the best images are selected.
Promotions by Reviewers When 3 distinct Reviewers promote the image, it moves on to the next stage of the process: evaluation for IOTD status.
Early dismissal Staff members have a lot of images to inspect on a daily basis, and they can dismiss images if they believe they don't meet the requirements for IOTD/TP selection. If an image is dismissed 5 times, it's removed from the process. This streamlines the process and ensures that any bias present in promotions could be overruled by other staff members.

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