The Trifid Nebula CDK17 REPRO 2!

[Paul Haese]

Looks good to me Greg.

[strongmanmike (Michael)]

Hey, now we're talking...Sidonioing is a veeery worthwhile mental illness to catch Quite an excellent Trifid now Greg, much better than teh first version, viva le repro

Mike

[gregbradley]

Originally Posted by multiweb

Now you're talking.

Thanks Marc. I was determined to get a good result out of it!

Originally Posted by Paul Haese

Looks good to me Greg.

Cheers Paul.

Originally Posted by strongmanmike

Hey, now we're talking...Sidonioing is a veeery worthwhile mental illness to catch Quite an excellent Trifid now Greg, much better than teh first version, viva le repro

Mike

This site certainly keeps you honest. The standard is really high on this site. I'd go so far as to say its the premier astroimaging site on the net.
Other sites tend not to comment or don't give constructive advice. This site is very active and involved.

Greg.

[alpal]

Hi Greg,
That's a lot better - I knew the data was good.
The stars are smaller & far better controlled & I can see a hint
of the famous jet.
Just out of interest - did you stretch it in 32 bits with FITS Liberator?

cheers
Allan

[gregbradley]

Originally Posted by alpal

Hi Greg,
That's a lot better - I knew the data was good.
The stars are smaller & far better controlled & I can see a hint
of the famous jet.
Just out of interest - did you stretch it in 32 bits with FITS Liberator?

cheers
Allan

Thanks Allan. The subexposures are handled in CCDStack and I did save the master subexposures as 32 bit. I create an LRGB colour combine in CCDStack not Photoshop. I suppose I can save the colour combine in 32 bit FITs and use FITs liberator. I had to resave as 16bit as PS wouldn't open the 32 bit floating. Come to think of it I got Eddie Trimarchi's plug in somewhere. I think that did the same as FIT Liberator.

Short answer - no. But I think I will try that out as above next time I do an image. The core stars were blown out in the subexposures so the Ha came to the rescue there.

Greg.

[Rod771 (Rod)]

Originally Posted by gregbradley

This site certainly keeps you honest. The standard is really high on this site. I'd go so far as to say its the premier astroimaging site on the net.
Other sites tend not to comment or don't give constructive advice. This site is very active and involved.

Greg.

Well Greg, I thought it was nice when first posted So I suppose its now Awesome!

And your right about IIS - best astronomy site in the solar system! I cant vouch for the whole galaxy There might be some super dude's pointing their scopes in our direction.

[alpal]

Originally Posted by gregbradley

Thanks Allan. The subexposures are handled in CCDStack and I did save the master subexposures as 32 bit. I create an LRGB colour combine in CCDStack not Photoshop. I suppose I can save the colour combine in 32 bit FITs and use FITs liberator. I had to resave as 16bit as PS wouldn't open the 32 bit floating. Come to think of it I got Eddie Trimarchi's plug in somewhere. I think that did the same as FIT Liberator.

Short answer - no. But I think I will try that out as above next time I do an image. The core stars were blown out in the subexposures so the Ha came to the rescue there.

Greg.

OK Greg,
maybe give it a go next time in 32 bits.

The idea is that each separate stack of LRGB starts out in 16
bit from the camera but the stacking process will have 32 bit information.
Each of the 4 stacks - which are in 32 bits - can then be saved
as a 32 bit FITS file & then stretched in FITS Liberator -
using the same chosen stretching function.
Note: every image will require it's own unique function - so what
may be good for a nebula won't be good for a faint galaxy.
Each of the 4 files- LRGB stretched - can then be saved in 16 bit TIFF for Photoshop.
I do the combine in Photoshop using channels as I don't have CCD stack.
Photoshop will not allow a 32 bit stretch with "curves" so unfortunately
the 32 bit process cannot be continued there.
It probably doesn't matter too much as the data is compressed anyway
for it's dynamic range after FITs Liberator.

I am starting to always take some short 30 second LRGB exposures to counteract
those pesky bright stars which hit the well depth causing
their colour & brightness information to be lost.

Anyway - keep up the good work -
I am really missing being able to image owing to this Melbourne weather.

cheers
Allan

[RickS (Rick)]

That's a very nice M20 now, Greg!

[Peter Ward]

Nice to see structure in the highlights. Yep.

[TimberLand (Justin)]

I agree with Rick. That does the setup justice, and looks like it should when it was taken with that top end bit if kit.

I had to adjust my monitor to see all the detail.

WOW. Love the dark dust and faint jet.


Justin

[gregbradley]

Originally Posted by Rod771

Well Greg, I thought it was nice when first posted So I suppose its now Awesome!

Cheers Rod. I certainly liked the colour it gave so easily in the processing in the first version. I guess that made me overlook some of the other aspects.

And your right about IIS - best astronomy site in the solar system! I cant vouch for the whole galaxy There might be some super dude's pointing their scopes in our direction.

Yes perhaps we are in an image right now. We should remember to smile when we look up at the sky at night!

Originally Posted by alpal

OK Greg,
maybe give it a go next time in 32 bits.

The idea is that each separate stack of LRGB starts out in 16
bit from the camera but the stacking process will have 32 bit information.
Each of the 4 stacks - which are in 32 bits - can then be saved
as a 32 bit FITS file & then stretched in FITS Liberator -
using the same chosen stretching function.
Note: every image will require it's own unique function - so what
may be good for a nebula won't be good for a faint galaxy.
Each of the 4 files- LRGB stretched - can then be saved in 16 bit TIFF for Photoshop.
I do the combine in Photoshop using channels as I don't have CCD stack.
Photoshop will not allow a 32 bit stretch with "curves" so unfortunately
the 32 bit process cannot be continued there.
It probably doesn't matter too much as the data is compressed anyway
for it's dynamic range after FITs Liberator.

I am starting to always take some short 30 second LRGB exposures to counteract
those pesky bright stars which hit the well depth causing
their colour & brightness information to be lost.

Anyway - keep up the good work -
I am really missing being able to image owing to this Melbourne weather.

cheers
Allan

Thanks for that workflow Allan. I will check that out. I did similar in that I saved the stacks as 32 bit and then rgb combined them as 32 bit. But to open in PS it had to be 16 bit or at least not in that 32bit FITs floating format.

Originally Posted by RickS

That's a very nice M20 now, Greg!

Thanks Rick. It'd be a good target for the Ceravolo. Perhaps next year now though.

Originally Posted by Peter Ward

Nice to see structure in the highlights. Yep.

Cheers Peter. It seems to be 2 groups of 3 bright stars.

Originally Posted by TimberLand

I agree with Rick. That does the setup justice, and looks like it should when it was taken with that top end bit if kit.

I had to adjust my monitor to see all the detail.

WOW. Love the dark dust and faint jet.


Justin

Thanks Justin. I notice the CDK picks up Ha even without imaging Ha. That must be due to the large aperture.

Greg.

[sjastro]

This site certainly keeps you honest. The standard is really high on this site. I'd go so far as to say its the premier astroimaging site on the net.
Other sites tend not to comment or don't give constructive advice. This site is very active and involved.

Greg.

Very nice image Greg.

Whether you find the site active and involved ultimately depends on who you are.
Over the years I've noticed the forum has become more clique orientated, if you are not in the clique you are given the cold shoulder.

Regards

Steven

[multiweb (Marc)]

Originally Posted by sjastro

Whether you find the site active and involved ultimately depends on who you are.
Over the years I've noticed the forum has become more clique orientated, if you are not in the clique you are given the cold shoulder.

Regards

Steven

nah... it's all good fun.

[alpal]

Originally Posted by sjastro

Very nice image Greg.

Whether you find the site active and involved ultimately depends on who you are.
Over the years I've noticed the forum has become more clique orientated, if you are not in the clique you are given the cold shoulder.

Regards

Steven

I haven't found that.
This site & Cloudy Nights are the two best on the net.
I find some people are a bit secretive about their work flows
but that is up to them.
If I discover anything good I tell everyone.

cheers
Allan

[gregbradley]

Originally Posted by sjastro

Very nice image Greg.

Whether you find the site active and involved ultimately depends on who you are.
Over the years I've noticed the forum has become more clique orientated, if you are not in the clique you are given the cold shoulder.

Regards

Steven

Thanks Steven. Perhaps so. Its also a lot larger than what it was.

Originally Posted by multiweb

nah... it's all good fun.

Originally Posted by alpal

I haven't found that.
This site & Cloudy Nights are the two best on the net.
I find some people are a bit secretive about their work flows
but that is up to them.
If I discover anything good I tell everyone.

cheers
Allan

I sometimes check out Cloudy Nights but usually after someone has posted a link to a specific thread that relates to the topic.

Greg.

[tilbrook@rbe.ne (Justin Tilbrook)]

That repro is stunning Greg!

Love the rich colours from the nebulae to the stars.

Cheers,

Justin.

[gregbradley]

Originally Posted by tilbrook@rbe.ne

That repro is stunning Greg!

Love the rich colours from the nebulae to the stars.

Cheers,

Justin.

Thanks very much Justin!

Greg.