Spectra of 11 northern hemisphere Wolf-Rayet stars (Johannes D. Clausen)

Spectra of 11 northern hemisphere Wolf-Rayet stars

Spectra of the 10 brightest Wolf-Rayet stars in the northern hemisphere, plus an additional fainter one, WR157. The spectra were captured through a C8 and a Star Analyser 100 diffraction grating filter. The reduced and rectified spectra are presented in the Revisions section. Revision B displays the three WC-class spectra and Revision C the eight WN-class spectra. Revision D compares the two spectral classes, exemplified by WR135 (red) and WR136 (blue). The telescope setup is shown in Revision F and the camera/filter setup in Revision G.

B

Description: WC class spectra

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C

Description: WN class spectra

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D

Description: Comparison between the WC and WN class of Wolf-Rayet star spectra

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F

Description: The telescope setup (excluding the dew caps)

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G

Description: Spectroscopic setup. From left to right: ZWO 290MM Mini camera - two extenders - 0.5x reducer - 3.8 degree prism - Star Analyser 100 diffraction grating.

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Spectroscopy

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	Basic failed
Started	...
Astrometry.net job	5292454
PixInsight job	n/a
PixInsight queue size	n/a
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