M27 with Marcel Vonk.

[ollypenrice]

This week Marcel has been operating the TEC140/Mesu200/Atik 460 outfit very attentively and to good effect! Since he was doing all the hard work while I was somnambulating in the warm room I woke up in time do some processing of his data. In total about 8 hours in LRGB and Ha. I will try to get some OIII for this since the outer shell does respond strongly and brings blue/green to the table on that part of the image.

Olly/Marcel.

[swag72]

I like that - Looks natural despite the outer stuff that will need some beating into submission   Nice star colour .... very nice  

[alexbb]

Good! Deep and fine details in the nebula. Now let's see it with OIII too! Eager for the final result

[ollypenrice]

Since I had the image 'in stock' anyway, I combined this with the one Yves and did a few years ago in his 14 inch. The image weighting is about 50/50. The TEC data held up remarkably well alongside that from the 14 inch. This has an OIII layer from the earlier image.

Olly

[gorann]

Fabulous images, both of them!

My only wonder is about the star colour. Seems to be that all smallish stars are reddish. Is that how they should be? Maybe they are behind some reddish dust?

[ollypenrice]

33 minutes ago, gorann said:

Fabulous images, both of them!

My only wonder is about the star colour. Seems to be that all smallish stars are reddish. Is that how they should be? Maybe they are behind some reddish dust?

I think this will be the dust-redenning effect where the shorter wavelengths suffer more extinction than the long. We are in the thick of the Milky Way here and images I've done nearby show similar effects. Here's the Coathanger Cluster, for instance, which is only about 8 degrees away from M27. A guest did a great widefield Coathanger this week and that dusty background is very extensive.

Olly

[swag72]

Wouldn't your clothes fall off that coathanger?  

[gorann]

21 minutes ago, ollypenrice said:

I think this will be the dust-redenning effect where the shorter wavelengths suffer more extinction than the long. We are in the thick of the Milky Way here and images I've done nearby show similar effects. Here's the Coathanger Cluster, for instance, which is only about 8 degrees away from M27. A guest did a great widefield Coathanger this week and that dusty background is very extensive.

Olly

Got it Olly

[ollypenrice]

1 hour ago, swag72 said:

Wouldn't your clothes fall off that coathanger?  

Nah, Sheila, that's the way it needs to be for me Drizabone coat after I've been to the pub for a Fosters or ten!

Bruce.

[gorann]

Fosters? Is that "beer" served in France? In Australia I hear that Aussis do not drink it , they only export it...

[toxic]

lovely rendition of the Dumbbell Olly 

[Allinthehead]

This is wonderful.

[Uranium235]

Youve absolutely smashed that one Olly.

[ollypenrice]

2 hours ago, Uranium235 said:

Youve absolutely smashed that one Olly.

Thanks, Rob. This one will probably keep me quiet for two or three years! Yves and I were pleased with the original 14 inch version but one or two niggles persisted and Marcel's shoot tidied them up. However, NASA have shown the real real extent of the Ha extensions and it would be nice to try... Uh-Oh!! 

Olly

[MartinB]

Well done Marcel, the best processing in the world won't overcome poor data, Olly has had it easy!!!

[wimvb]

On 2017-09-23 at 17:43, gorann said:

Fabulous images, both of them!

My only wonder is about the star colour. Seems to be that all smallish stars are reddish. Is that how they should be? Maybe they are behind some reddish dust?

 

On 2017-09-25 at 01:21, ollypenrice said:

Thanks, Rob. This one will probably keep me quiet for two or three years! Yves and I were pleased with the original 14 inch version but one or two niggles persisted and Marcel's shoot tidied them up. However, NASA have shown the real real extent of the Ha extensions and it would be nice to try... Uh-Oh!! 

Olly

Great image, Olly.

I don't know about NASA, but Fabian Neyer has a rather nice rendition of the extended Ha field around this neb.

http://www.starpointing.com/ccd/m27.html.

The extended Ha probably also explains the reddish stars that Göran noticed.

[ollypenrice]

4 hours ago, wimvb said:

 

Great image, Olly.

I don't know about NASA, but Fabian Neyer has a rather nice rendition of the extended Ha field around this neb.

http://www.starpointing.com/ccd/m27.html.

The extended Ha probably also explains the reddish stars that Göran noticed.

Mr Neyer's rather good, isn't he??? I greatly admire his ability to find faint Ha and hadn't seen this one.  Quite outstanding.

Olly

[wimvb]

6 minutes ago, ollypenrice said:

Mr Neyer's rather good, isn't he??? I greatly admire his ability to find faint Ha and hadn't seen this one.  Quite outstanding.

Olly

He spent 10 times as long chasing photons as (than?) you and Marcel. 22 hours on Ha alone. And 18 hours on LRGB, which mainly got him good star colour.

But it certainly paid off.