Yoda with 19 hours H-alpha

Placidus (Mike and Trish) · #1 10-09-2015, 02:30 PM

There are at least 12 Herbig-Haro objects, studded along two separate jets, in the region of Yoda's Walking Stick in Corona Australis.

See here for a learned ESO article with many diagrams.

A magnificent shot of just part of the region of interest from the ESO La Silla 8.2 metre scope is here.

Really wanting to see these, grit free, we added 19 hours of 3nM H-alpha to our existing colour shot (4.5hrs L, 2.5 hrs each RGB).

Adding the H-alpha as luminance was counter-productive, because it tends to exclude the wonderful blue reflection nebulosity and any OIII emission.

Consequently we added it in as red, with equal weighting to the rest of the red channel. We can now see most of the dozen or so labelled objects in the ESO article as intense red splotches or streaks.

Full size original image here.

gregbradley · #2 10-09-2015, 02:33 PM

A sensational image Mike.

Greg.

RickS (Rick) · #3 10-09-2015, 02:56 PM

Very cool, M&T! I expect the Ha by itself would make a very interesting image too?

Cheers,
Rick.

Andy01 (Andy) · #4 10-09-2015, 03:16 PM

You guys Rock - well done!

multiweb (Marc) · #5 10-09-2015, 03:40 PM

Smooth as. This is really cool.

Octane (Humayun) · #6 10-09-2015, 04:12 PM

That is sensational! Chills down spine looking at the red bits.

H

Placidus (Mike and Trish) · #7 10-09-2015, 04:33 PM

Quote:

Originally Posted by gregbradley

A sensational image Mike.

Greg.

Thanks, Greg!

Quote:

Originally Posted by RickS

Very cool, M&T! I expect the Ha by itself would make a very interesting image too?

Cheers,
Rick.

Thanks, Rick. We'll try to get round to producing a labelled H-alpha crop of the best bits.

Quote:

Originally Posted by Andy01

You guys Rock - well done!

Thanks Andy!

Quote:

Originally Posted by multiweb

Smooth as. This is really cool.

Cheers, Marc.

Quote:

Originally Posted by Octane

That is sensational! Chills down spine looking at the red bits.

H

Thanks, Humayun. It's kept us busy for many a freezing night.

marco (Marco Lorenzi) · #8 10-09-2015, 05:03 PM

Really nice Mike!

Quote:

Originally Posted by Placidus

Adding the H-alpha as luminance was counter-productive, because it tends to exclude the wonderful blue reflection nebulosity and any OIII emission.
Consequently we added it in as red, with equal weighting to the rest of the red channel.

I have just posted an explanation on a technique to blend NB and RGB data together avoiding the issues you mention, give it a try and see if it works for you

Regards
Marco

Placidus (Mike and Trish) · #9 10-09-2015, 06:45 PM

Quote:

Originally Posted by marco

Really nice Mike!

I have just posted an explanation on a technique to blend NB and RGB data together avoiding the issues you mention, give it a try and see if it works for you

Regards
Marco

Thanks, Marco. That's very generous. Your step six looks tricky. Hearty congratulations on your APOD.

M & T

Slawomir (Suavi) · #10 10-09-2015, 06:49 PM

Awesome image

LewisM · #11 10-09-2015, 06:57 PM

SILENT TEFLON!

Yep, it is SOOOOOOOOOOOOOOO noise free and SOOOOOOOOOOOOOOO smooth.

Magnificent. I don't often go as far as magnificent, but this is entirely worthy of such an accolade.

Rod771 (Rod) · #12 10-09-2015, 07:53 PM

Nice and dark, just like space should be, Love it!

Somnium (Aidan) · #13 10-09-2015, 08:33 PM

Simply beautiful

Stevec35 (Steve) · #14 10-09-2015, 08:48 PM

Terrific Mike and Trish! I don't think I've seen this region so vibrant before.

Steve

Placidus (Mike and Trish) · #15 10-09-2015, 08:50 PM

Quote:

Originally Posted by Slawomir

Awesome image

Thanks Slawomir.

Quote:

Originally Posted by LewisM

SILENT TEFLON!

Yep, it is SOOOOOOOOOOOOOOO noise free and SOOOOOOOOOOOOOOO smooth.

Magnificent. I don't often go as far as magnificent, but this is entirely worthy of such an accolade.

Thank you, Lewis. Lovely metaphor too. We are much encouraged.

Quote:

Originally Posted by Rod771

Nice and dark, just like space should be, Love it!

Cheers!

Quote:

Originally Posted by Somnium

Simply beautiful

Ta!

h0ughy (David) · #16 10-09-2015, 10:39 PM

oh the force is strong with this one - fanbloodytastic

graham.hobart (Graham stevens) · #17 11-09-2015, 01:32 PM

excellent!

Very cool indeed!
thanks for posting
graz

Placidus (Mike and Trish) · #18 11-09-2015, 05:26 PM

Quote:

Originally Posted by h0ughy

oh the force is strong with this one - fanbloodytastic

Thank you! 'tis interesting to think how seemingly quiet bits of sky are actually violently active, and up to no good.

Quote:

Originally Posted by graham.hobart

excellent!

Very cool indeed!
thanks for posting
graz

Cheers, Graham. Thrilled that you like it.

Best,
Mike and Trish