The Crab Nebula (Gabe Shaughnessy)

Celestial hemisphere: Northern · Constellation: Taurus (Tau) · Contains: Crab nebula · M 1 · NGC 1952 · Sh2-244

Powered byPixInsight

The Crab Nebula

Powered byPixInsight

The Crab Nebula

The Crab Nebula is a supernova remnant that lies some 6500 light years away in the constellation Taurus. The nebula was discovered in 1731 and has the 1054 supernova event recorded by Chinese astronomers as its progenitor. At the heart of the nebula is the Crab Pulsar, which is a neutron star some 18 miles across and spins 30 revolutions per second. It emits very bright pulses of electromagnetic radiation from gamma rays on down to low energy radio waves. It's one of the brightest sources of high energy photons in the sky. The inner portion of the Crab Nebula has been shown to continue to expand, driven by the persistent pulsar wind.

For processing, I took a new route for me when combining the RGB and narrowband data. I used starnet to get RGB nebulosity, narrowband nebulosity, and RGB stars, then combined them with the pixel math expression

rgb_neb * rgb_wgt + nb_neb * (1 - rgb_neb * rgb_wgt) + rgb_stars

This expression accentuates narrowband data where there's little RGB data. This is the case for the OIII pillar structure on the top of the Crab, and fountain structure on the bottom. This also allows me to keep more of the RGB core of the Crab, which is more a pale white color. A simple addition of narrowband and rgb nebulosity would weaken the narrowband signal strength. In image C, I show the dependency on the rgb_wgt parameter, which varies from 0 (full nb + rgb stars) to 1. I also show the rgb image alone. I like rgb_wgt = 0.5, so went with that as my final version.

Original
Final
B
C

Imaged with Voyager
Light Polluted skies
Fast Newtonians
Cloudy Nights
Milwaukee Astronomical Society
Suburban Astrophotography
Narrowband imaging
PixInsight Addicts

Please note: The following tables are updated every 24 hours.

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

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.

Status	Advanced success
Started	...
Astrometry.net job	4503264
PixInsight job	S4I2L8QS2NCIVP6WSEYXNR0MXG7SMEHP
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	05h34m31s.798
RA (top/left)	05h35m37s.462
RA (top/right)	05h33m20s.657
RA (bottom/right)	05h33m26s.309
RA (bottom/left)	05h35m42s.739

Dec (center)	+22°00′51″.35
Dec (top/left)	+22°14′51″.58
Dec (top/right)	+22°13′20″.85
Dec (bottom/right)	+21°46′49″.17
Dec (bottom/left)	+21°48′17″.82

Image Index:

Contribution Index (beta):

The Crab Nebula

The Crab Nebula

Equipment

Acquisition details

Description

Comments

Revisions

Sky plot

Histogram

In these public groups

Image Index:

Contribution Index (beta):

The Crab Nebula

The Crab Nebula

Equipment

Acquisition details

Description

Comments

Revisions

Sky plot

Histogram

In these public groups

Notifications

AstroBin is in READ ONLY mode

Sorry :-(

Sorry :-(

Sorry :-(

Are you really sure?

Warning!

Warning!

Are you sure?

Report abuse

Slideshow settings

IOTD/TP stats (last [x] days)

Distribution of astrophotographers

Distribution of subject types

Distribution of data sources

Sorry

Sorry

Share

Upload new revision

Upload uncompressed source (XISF/FITS/PSD/TIFF)

Delete image and all its revisions?

Delete original image?

Delete all other versions?

Delete all revisions?

Delete this revision?

Delete this revision?

IOTD/TP stats

The following people like this image

The following people bookmarked this image

Warning

Flag malfunctioning thumbnails

Contains

Remove yourself as a collaborator

Plate-solving information