NGC 7331 & Stephans Quintet (Wolfgang Ransburg)

Celestial hemisphere: Northern · Constellation: Pegasus (Peg) · Contains: NGC 7318 · NGC 7319 · NGC 7320 · NGC 7331

NGC 7331 & Stephans Quintet, Wolfgang Ransburg

Powered byPixInsight

NGC 7331 & Stephans Quintet

Link: http://www.wolfi-ransburg.de/astronomie.html

Powered byPixInsight

NGC 7331 & Stephans Quintet

Link: http://www.wolfi-ransburg.de/astronomie.html

NGC 7331 und Stephans Quintett sind immer eine Reise wert. Eine Besonderheit verknüpfe ich mit dieser Aufnahme. Ich habe einen älteren IDAS Filter verwendet. Leider habe ich nicht genau hingesehen, der Filter war voller Staub - und ich habe, weil die Ausleuchtung des TSFLAT 2,5 recht gut ist, schon lange kein Flat mehr gemacht. Gut daß ich die Kamera mit Filter montiert in den Peltier Koffer gegeben habe. Also nichts wie raus zum Refraktor , montiert und ein schnelles Flat nachgeholt.

Aber was muß ich sehen, jedes Donut war nach dem Flat heller und sogar eine umgekehrte Vignettierung war zu sehen, der Rand war heller, als die Mitte. Was ist denn nun schon wieder los, habe ich verlernt, Flats zu machen. Also Recherche, Recherche Recherche ... und siehe da, ich bin mit dem Problem der "überkorrigierten Flats" nicht alleine. Es gibt sogar einen Hinweis, der über "Pixelmath" die Wirkung des Flats nachträglich mildert. Aber auch einen weiteren Hinweis habe ich gesehen - länger belichten, weil das Verhalten der back-illuminated CMOS Kameras am Anfang wohl nicht linear sein soll und .... BIAS.

Also nochmal Kamera runterkühlen und testhalber Bias gemacht und vom Flat abgezogen ... hat nicht viel gebracht. Dann habe ich bei der Kalibration in Pix die Einzelaufnahmen, das kalibrierte Flat UND das Bilas von den Lights abgezogen und ... Voila - glatter Hintergrund !!! Mann, ihr könnt Euch meine Erleichterung vorstellen.

Nun bin ich wieder brav, ich mache meine Flats, meine Darks und auch meine Bias ... wie in alten Zeiten !!

The refractors!
CMOS Imagers
ASI 071 mcc
TS CF-APO FPL55

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 success
Started	...
Astrometry.net job	5121285
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

Image Index:

Contribution Index (beta):

NGC 7331 & Stephans Quintet

NGC 7331 & Stephans Quintet

Equipment

Acquisition details

Description

Comments

Sky plot

Histogram

In these public groups

		...
You have no new notifications.

Image Index:

Contribution Index (beta):

NGC 7331 & Stephans Quintet

NGC 7331 & Stephans Quintet

Equipment

Acquisition details

Description

Comments

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?

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