The Crab Nebula - The Six Variations of the Mapped Narrowband Filters (Eric Coles (coles44))

The Crab Nebula - The Six Variations of the Mapped Narrowband Filters

There are six potential ways to map HOS narrowband filter images to the RGB palette, without using the same NB image in more than one of the RGB channels (I know you are checking the accuracy of that statement). This image represents all of those variations. The image in the upper left is the one posted earlier (https://www.astrobin.com/hssktb/).

I created this image just to show the potential of different color mapping. Also, because, if you don't already know this, almost all the images you see from the space telescopes are mapped color images. That is, they take the image from a particular filter (in the visible or not) (and there are many filters), and map (assign) it to a particular part of the visible spectrum, that we can actually see. The objective is not only to produce an appealing image, but to represent the emission of a particular target in an obvious visible image that we can easily interpret.

You can probably figure out the mapping from the color variations in each panel of the image. The first clue would be to look at the original Crab Nebula image and read the description. The exact mapping is described for that image. From that data, you should be able to figure out the rest. have fun.

Narrowband imaging
Sharpless2 Objects

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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

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	Basic failed
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