My Last Galaxy of the Season: M83 The Southern Pinwheel Galaxy

Will be the last galaxy for me of the season. Very very low in the southern sky for me, never getting higher than 29 degrees in the sky. I was surprised at the amount of Ha signal in the galaxy and then pulling the catalog I was no longer surprised. Very heavily catalogued and studied!! Something that popped out when i was doing the Continuum Subtraction was an odd object with a shadow in the middle of it. Turns out it is the core of PGC48287 so I am leaning to the side that that is real structure I detected! PGC4867 had some nice dots of Ha in it too. Finally there is a bright Quasar, QSO B1333-298, with a Z shift of 1.9 putting it at a comoving radial distance of 16.7 billion light years!
Hope you all had a successful galaxy season!!
Link to Astrobin: astrob.in/i0jstm/0/
Please leave a comment and if you want to try out the automated FindPreview script let me know!

[@setiv2]

If anyone wants to try the Script to automatically find a background region preview here is the link. Please provide feedback if you use it: www.setiastro.com/s/FindBackgroundGradientDescentV10beta.zip

[@josephluciani5531]

Great tutorial Frank. Your in-depth analysis of your images is amazing (and inspiring). I tried your background preview script along with your other scripts, they’re all great! Keep em coming!

[@Arcteek]

Great work and explanations. Bravo!

[@jeffwinterbourne]

Great image. I really like the Ha colour choice

[@alikheiri7389]

Yet another great video!

[@AmatureAstronomer]

Pretty.

[@carvrodrigo]

Wow that CS was on point!! Can you make a video about how you achieve this result with continuum subtraction? I did mine in photoshop with layers but is not that good

[@setiv2]

I have actually made a couple videos on continuum subtraction. This is the most popular one. czcams.com/video/4xTknArd8AY/video.html

[@setiv2]

My other one with a different method is here czcams.com/video/L_P5Cr6B_ww/video.html

[@Travis1.980]

which telescope do u use?

[@setiv2]

Orion 120ST for that image. All equipment used is also on astrobin if you follow that link.

[@Travis1.980]

@@setiv2 incredible