Ngc 7552

[Stevec35 (Steve)]

Hi to all

NGC 7552 is the 4th member of the Grus quartet (the one a bit further away from the other three). I thought that it would be a total disaster because the only thing that went reasonably okay was the luminance. During the colour I had appalling seeing and numerous unexplained guiding problems. So I guess this shows that you can generally salvage a LRGB as long as you have good luminance data.

The galaxy itself has a very interesting structure. Maybe there will be a Hubble Heritage image of it one day.

This may be the last RC image for a while as it's coming off the mount soon.

Cheers

Steve

http://members.pcug.org.au/~stevec/n...STL6303_RC.htm

[gregbradley]

That turned out quite well despite your troubles.

Greg.

[sjastro]

The seeing conditions in southern Victoria have been terrible as well, which has curtailed my own imaging.

Your image Steve however has come out very well.

Regards

Steven

[jjjnettie (Jeanette)]

It's a pretty little galaxy to be sure.

[John Hothersall]

This galaxy reminds me of 7479 in Pegasus, just love the backgnd galaxies and backgnd galaxies around the actual arms of 7552.

John.

[Stevec35 (Steve)]

Originally Posted by John Hothersall

This galaxy reminds me of 7479 in Pegasus, just love the backgnd galaxies and backgnd galaxies around the actual arms of 7552.

John.

Thanks John. It is a busy area for faint galaxies.

Originally Posted by jjjnettie

It's a pretty little galaxy to be sure.

Thanks JJ. It is a nice one. Greg did a nice shot of all four recently.

Originally Posted by sjastro

The seeing conditions in southern Victoria have been terrible as well, which has curtailed my own imaging.

Your image Steve however has come out very well.

Regards

Steven

Thanks Steven. Seeing is always bad here in September but lately it seems to be getting worse. Very depressing.

Originally Posted by gregbradley

That turned out quite well despite your troubles.

Greg.

Thanks Greg.

[madbadgalaxyman (Robert)]

Steve,

I enjoyed your image of N7552.

The nuclear region is good and intense, due to the effects of a very violent burst of star formation.
Radio and infrared observations plainly show a very tight (9 by 7 arcseconds) ring of supergiant star-formation regions surrounding the centre of this galaxy;
I am not sure how much of this would be visible in the optical regime, but probably the ring is well hidden due to the effects of dust extinction.

For those of you reading this thread who don't know the online version of the De Vaucouleurs Atlas of Galaxies, I note that there is a high resolution image of NGC 7552 at:

http://kudzu.astr.ua.edu/devatlas


There are a number of Hubble Space Telescope images of this galaxy available at http://hla.stsci.edu
so, "just for fun and profit", here is a preview, from this website, of an F439W (blue) image taken with the WFPC2 instrument on the HST:

[strongmanmike (Michael)]

Yeh, that's a great galaxy really and probably deserves more attention than its more famous nearby trio..?

Yep if your Lum is ok then RGB can be complete crap and you can still salvage something

Mike

[Alchemy (Clive)]

Your bad is most peoples good.

[Ric]

A very nice capture Steve.

I must agree it has a structure about it.

[Stevec35 (Steve)]

Originally Posted by Ric

A very nice capture Steve.

I must agree it has a structure about it.

Thanks Ric

Originally Posted by Alchemy

Your bad is most peoples good.

Thanks Clive. I probably am a bit hard on myself sometimes.

Originally Posted by strongmanmike

Yeh, that's a great galaxy really and probably deserves more attention than its more famous nearby trio..?

Yep if your Lum is ok then RGB can be complete crap and you can still salvage something

Mike

Thanks Mike. Maybe I'll do a mosaic incorporating the other three sometime.

Originally Posted by madbadgalaxyman

Steve,

I enjoyed your image of N7552.

The nuclear region is good and intense, due to the effects of a very violent burst of star formation.
Radio and infrared observations plainly show a very tight (9 by 7 arcseconds) ring of supergiant star-formation regions surrounding the centre of this galaxy;
I am not sure how much of this would be visible in the optical regime, but probably the ring is well hidden due to the effects of dust extinction.

For those of you reading this thread who don't know the online version of the De Vaucouleurs Atlas of Galaxies, I note that there is a high resolution image of NGC 7552 at:

http://kudzu.astr.ua.edu/devatlas


There are a number of Hubble Space Telescope images of this galaxy available at http://hla.stsci.edu
so, "just for fun and profit", here is a preview, from this website, of an F439W (blue) image taken with the WFPC2 instrument on the HST:

Attachment 101017

Thanks for the comments and link. Obviously there are HST pictures of it but it appears no one has done a colour pretty picture yet.

[Stevec35 (Steve)]

For anyone interested in taking another look I did my customary day after reprocess of NGC 7552 and was able to bring out even more detail. I've also added a full resolution crop. It's amazing how much detail there is.

Certainly seems a good topic for a professional observatory pretty picture to me.

Cheers

Steve

http://members.pcug.org.au/~stevec/n...STL6303_RC.htm

[madbadgalaxyman (Robert)]

Steve,
Your repro is excellent. Buta, in the de Vaucouleurs Atlas of Galaxies, remarks about the complex and unusual structure of the bar.

[Stevec35 (Steve)]

Originally Posted by madbadgalaxyman

Steve,
Your repro is excellent. Buta, in the de Vaucouleurs Atlas of Galaxies, remarks about the complex and unusual structure of the bar.

Thanks Robert

[Ross G]

A beautiful galaxy photo Steve.


Ross.

[Stevec35 (Steve)]

Originally Posted by Ross G

A beautiful galaxy photo Steve.


Ross.

Thanks Ross

[atalas]

A great looking galaxy Steve....shot in Canberra light pollution was It?

[mill (Martin)]

Nicely done Steve and i know what you mean with the weather
@#%@ clouds

[multiweb (Marc)]

Very nice galaxy and lovely details.

[richardo (Rich)]

Very nicely done Steve!
Yes, it looks like some pretty heavy activity happening in and around the nucleus... not to mention all the little galaxies it's devouring!

Rich