M82 Cigar Galaxy (multiband)

A place to share images that you have taken with SharpCap.
Forum rules
Please upload large images to photo sharing sites (flickr, etc) rather than trying to upload them as forum attachments.

Please share the equipment used and if possible camera settings to help others.
Post Reply
User avatar
Menno555
Posts: 418
Joined: Mon Apr 20, 2020 2:19 pm
Location: The Netherlands
Contact:

M82 Cigar Galaxy (multiband)

Post by Menno555 »

M82 Cigar Galaxy in multiband (broadband, narrowband and infrared)

Shot over 7 nights including moon, clouds, and so on. Total integration time of 12:50 hours. First time of mixing this divers amount of data and was fun to do.
Made a color version and also a slightly enlarged negative version. I always find that in negative things are getting noticed differently.
I hoped on more detail but realized that I only have an 8" scope, don't use guiding and am in the middle of a city with Bortle 7/8.
So I'm content with the result :)

The 3000px color version can be seen here: https://i.ibb.co/5Mbp9Td/M82-Multiband.jpg

Bortle 7/8
Meade LX200 8" f/10 ACF OTA
Ioptron CEM25EC mount (no guiding)
Optolong L-eNhance filter
Baader Neodymium Skyglow filter
Baader IR-Pass 685nm filter
Zwo ASI071MC Pro camera

Captured with SharpCap Pro @ -10 Celsius / White balance R50 B50
Baader Neodymium filter
14 x 222 sec / Gain 0 / Offset 4
42 x 120 sec / Gain 120 / Offset 10
Baader IR-Pass filter
10 x 600 sec / Gain 90 / Offset 4
Optolong L-eNhance filter
54 x 600 sec / Gain 90/ Offset 4

Stacked with DeepSkyStacker
Narrowband and IR stacked together, broadband apart

Processed with Siril and Photoshop
Siril: Background Extraction and Histogram
Photoshop: layered the 2 stacked images. Multiple steps o.a. Curves, Levels, Camera Raw Filter (blacks, saturation, clarity, noise reduction), a bit of dimension reduction

M82 color
M82 color
M82_Multibandsm.jpg (233.34 KiB) Viewed 243 times
M82 negative b/w
M82 negative b/w
M82_Multiband_Negative.jpg (581.58 KiB) Viewed 243 times
User avatar
oopfan
Posts: 995
Joined: Sat Jul 08, 2017 2:37 pm
Location: New York
Contact:

Re: M82 Cigar Galaxy (multiband)

Post by oopfan »

Thirteen hours! That is true dedication, Menno.

Brian
User avatar
turfpit
Posts: 1443
Joined: Mon Feb 13, 2017 8:13 pm
Location: UK
Contact:

Re: M82 Cigar Galaxy (multiband)

Post by turfpit »

Very good Menno. Have a cigar!

Dave
User avatar
Menno555
Posts: 418
Joined: Mon Apr 20, 2020 2:19 pm
Location: The Netherlands
Contact:

Re: M82 Cigar Galaxy (multiband)

Post by Menno555 »

oopfan wrote: Mon May 10, 2021 10:22 pm Thirteen hours! That is true dedication, Menno.

Brian
Thanks Brian! And yes, I more and more am starting to enjoy the act of gathering data :P
turfpit wrote: Tue May 11, 2021 6:29 am Very good Menno. Have a cigar!

Dave
Thanks Dave! I will, together with some whiskey ;)
User avatar
turfpit
Posts: 1443
Joined: Mon Feb 13, 2017 8:13 pm
Location: UK
Contact:

Re: M82 Cigar Galaxy (multiband)

Post by turfpit »

Menno

Worth posting that on Astrobin. I think up to 10 images is free.

Dave
timh
Posts: 206
Joined: Mon Aug 26, 2019 5:50 pm

Re: M82 Cigar Galaxy (multiband)

Post by timh »

Your filter worked great to bring out the HII Menno and I agree with you about the value of the negative contrast images - one sees completely different detail in them.
TimH
User avatar
Menno555
Posts: 418
Joined: Mon Apr 20, 2020 2:19 pm
Location: The Netherlands
Contact:

Re: M82 Cigar Galaxy (multiband)

Post by Menno555 »

turfpit wrote: Tue May 11, 2021 9:02 am Menno

Worth posting that on Astrobin. I think up to 10 images is free.

Dave
Been thinking about that Dave. But also thinking on a total re-design of my own site. Till now that's dedicated to my art but thinking about doing a total format and then an art part and an astro part.
timh wrote: Tue May 11, 2021 8:59 pm Your filter worked great to bring out the HII Menno and I agree with you about the value of the negative contrast images - one sees completely different detail in them.
TimH
Thanks Tim! And yes, the filter works great. I used it on 23 + 24 April with almost a full moon and it captured all just fine :)

Menno
Post Reply