IC417 Spider and Fly - simple first processing from long-term project (HSS-RGB) (Pam Whitfield)

IC417 Spider and Fly - simple first processing from long-term project (HSS-RGB)

Revision title: V2 - being more careful not to clip the fainter detail

This is the first go at with a simple procesing experiment of my first real long-term project. Data for this was taken over 20 separate sessions over a period of 2.5 months (a couple of hours here and there as a rule) so is rather more involved than the earlier image - I won't game the system by claiming imaging time in my earlier 6h Astrobin image twice though ;-)
It needed alot of Sii to get much detail and put my time there rather than wasting time on largely non-existent Oiii.

Totals in the image:
Ha 600s x 112 (18h 40m)
Sii 600s x 120 (20h)
R 180s x 22 (66m)
G 180s x 23 (69m)
B 180s x 22 (66m)
total of 42h

The processing workflow was fundamentally different on this one. Each gradient-corrected stack was first denoised using AstroDenoisePyGUI before fairly simple combinations of each channel (starless HSS and RGB stars). A bit of blue contrast was added using the starless blue channel. Not a displeasing result with pretty minimal post-processing (pre-processing was a complete pain with all the different calibration masters!)

The Sii data is showing some issues with the anti-blooming circuit in my QHY9 but not a huge amount I can do about that after the fact. I drizzled the data to improve the star shapes a bit as there was a decent amount of statistics to play with.
The AstroDenoisePyGUI program is worth a look as it's been trained with actual astrophotos and does a really nice job without any artefacting that I can see. Star removal was very clean when noise wasn't a problem.

I'm looking forward to seeing how much I can get out of this data with a bit of work!

Original
Final
B

B

Title: V2 - being more careful not to clip the fainter detail

Description: makes my anti-bloom issue in the Sii look worse but swings and roundabouts!
The default settings for the denoise in AstroDenoisePyGUI were massively off for my 16-bit data and I'm finding Irfanview sometimes doing some really weird stuff to the dynamic range on saving images.

Uploaded: ...

Women Astrophotographers
Yorkshire Astro Imaging
QHY Users Group
UK Astro-Imaging
KODAK 8300 sensor
Narrowband imaging

	Distinct awarded users	Total awarded images
Image of the day
Top picks
Top pick nominations

	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

	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

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	5649717
PixInsight job	A25NFZ9Y5R76VEEWQ73O9FDGJGLQJP22
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	05h29m12s.80
RA (top/left)	05h32m42s.79
RA (top/right)	05h24m16s.39
RA (bottom/right)	05h25m45s.38
RA (bottom/left)	05h34m04s.24

Dec (center)	+34°25′01″.0
Dec (top/left)	+35°15′07″.0
Dec (top/right)	+34°51′14″.1
Dec (bottom/right)	+33°34′31″.8
Dec (bottom/left)	+33°58′04″.2

Image Index:

Contribution Index (beta):