Hemisphere:  Northern  ·  Constellation: Ursa Major (UMa)  ·  Contains:  Bode's Galaxy  ·  Cigar Galaxy  ·  M 81  ·  M 82  ·  NGC 2976  ·  NGC 3031  ·  NGC 3034  ·  NGC 3077
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IFN towards Bode's Galaxy and the Cigar in HaLRGB, 



    
        

            Jim Lindelien
IFN towards Bode's Galaxy and the Cigar in HaLRGB
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IFN towards Bode's Galaxy and the Cigar in HaLRGB

Getting plate-solving status, please wait...
IFN towards Bode's Galaxy and the Cigar in HaLRGB, 



    
        

            Jim Lindelien
IFN towards Bode's Galaxy and the Cigar in HaLRGB
Powered byPixInsight

IFN towards Bode's Galaxy and the Cigar in HaLRGB

Technical card

Imaging telescopes or lenses: Celestron RASA 11

Imaging cameras: ZWO ASI6200MM Pro  ·  ZWO ASI128MC Pro

Mounts: iOptron CEM120EC

Guiding telescopes or lenses: Astromania 60mm Guide Scope

Guiding cameras: ZWO ASI290MM mini

Software: ASCOM Platform 6  ·  NINA  ·  darkarchon EZ Processing Suite  ·  Pleiades Astrophoto PixInisight 1.8 Ripley (x64)  ·  Cartes du Ciel  ·  Open PHD Guiding PHD2 Guiding  ·  StarNet++  ·  Affinity Photo

Filters: Astrodon Tru-Balance Generation 2 E-Series - L 50mm - NIR Blocked  ·  Astrodon Ha 5nm 50 mm Square

Accessory: QHYCCD Polemaster  ·  Starizona Microtouch Autofocuser  ·  Guzila Fanless Mini PC Intel Core i5-5257U  ·  iOptron Tri-Pier 360  ·  Baader UFC Filter Slider


Dates:March 4, 2021March 16, 2021

Frames:
Astrodon Ha 5nm 50 mm Square: 56x120" (gain: 200.00) -5C bin 2x2
Astrodon Tru-Balance Generation 2 E-Series - L 50mm - NIR Blocked: 120x60" (gain: 100.00) -5C bin 2x2
Astrodon Tru-Balance Generation 2 E-Series - L 50mm - NIR Blocked: 170x60" (gain: 132.00) -5C bin 1x1

Integration: 6.7 hours

Darks: ~32

Flats: ~32

Flat darks: ~32

Avg. Moon age: 11.64 days

Avg. Moon phase: 38.19%

Bortle Dark-Sky Scale: 4.00

Mean SQM: 20.47

Temperature: 3.00


Basic astrometry details

Astrometry.net job: 4322058

RA center: 9h 55' 8"

DEC center: +69° 3' 57"

Pixel scale: 1.672 arcsec/pixel

Orientation: 271.331 degrees

Field radius: 1.844 degrees


Resolution: 6707x4253

Locations: N. America, Pahrump, Nevada, United States

Data source: Backyard

Description

The extra-galactic Integrated Flux Nebula between here and Bode's Galaxy M81 and the Cigar Galaxy M82.

This very dim dust orbits outside our Milky Way galaxy and is illuminated by reflectance of the total light output of it, hence the name "integrated flux".

There are fiery red filaments shooting from M82 because it is an "AGN" galaxy, i.e. it has an active galactic nucleus--its black hole is gobbling matter and high energy vortexes aligned to its spin axis are flinging matter at large fractions of lightspeed out beyond the plane of the galaxy.

Within the past 10 million years ("yesterday" in galactic time) our Milky Way was an AGN, discovered recently by the detection of the so-called Fermi Bubbles of high energy gamma ray emissions from the locations of the former jets of matter above and below our galaxy, produced when high speed particles slam into extra-galactic dust and gas.

Ponder M82 and imagine how our night skies appeared to our primate ancestors 10M years ago!

Imaging strategy:

For the very dim IFN and for galactic details and Ha emissions I used the monochrome ASI6200MM for its higher quantum efficiency and low noise floor, and relied on the RASA-11's optical speed to reduce capture time for these details (Ha 56subs at 120sec at 2x2 gain 200; L 120subs at 60sec, 2x2 gain 100).

For additional L and for RGB[*1] I used the OSC ASI128MC (170subs 60sec, binned 1x1 gain 132).

I was surprised to find Ha signal from the IFN (assumed to be variations in reflectance vs. ionized emission) and this results in some of the IFN's tonal variations in the final rendering.

All channels were drizzle integrated at 2x and down-sampled after post processing.

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1. The OSC Bayer matrix R, G, and B filters lack sharp wavelength cutoffs at their passband edges, unlike astrophotography filters. To improve OSC color separation I applied a color transformation matrix to the raw OSC data as described below after stacking and prior to conventional post processing steps:

https://www.astrobin.com/avyvpz/?nc=user

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