NGC 7331 + IFN

[ManuelJ]

Hi,

This is my attempt at showing the IFN that it's surrounding NGC 7331. I think that maybe there is some kind of tidal added in the background.

I used this time excalibrator for color calibration and it just works wonderfully.

http://www.manuelj.com/Astronomy/Galaxy/NGC-7331

Regards,
Manuel.

[Lex]

Manuel,

There is nothing else to say to you image than WWWWWWOOOOOOOOOWWWWWWW!!!! 

Really absolutely nice!!!

Respect

[Juan Conejero]

Hi Manuel,

Very nice image. Did you try ColorCalibration using 7331 as the white reference?

[ManuelJ]

Hi Manuel,

Very nice image. Did you try ColorCalibration using 7331 as the white reference?

Hi,

Of course, but sadly it didn't work as expected. It appeared quite purple.

Using color calibration it's not very... straightforward for me.

Regards,
Manuel.

[Juan Conejero]

It appeared quite purple.

Hmm. You applied BN/CC to the linear image, didn't you? If yes, then I'd appreciate if you can upload the linear RGB image, if possible, just after combining the calibrated raw frames. If CC didn't work for your linear images then I definitely want to debug it. If not, then we know why it didn't work: no (correct, sound) color calibration procedure can be implemented with nonlinear data.

[Ginge]

A magnificent image Manuel. You can even glimpse a tidal stream as you mention on the left side.

Could you share more of the processing steps? Dynamic PSF? deconvolution?

Very well done!
Ginge

[Daniel_Guetl]

Hi Manuel,

impressive equipment and an impressive image Looks like you have everything under control 

regards,

Daniel

[Lex]

Manuel,

Just one more question, how did you do it to buy all this equipment?
I dream about stuff like that but wonder how I could buy it

Best

[Yuriy Toropin]

Manuel,
very deep and impressive!

Is there any special reason why you limit L exposures by 10 minutes only?

[ManuelJ]

Juan Conejero: Yes, I used your tutorials step by step with linear images. You can get the fit files here: http://www.megaupload.com/?d=QIBN0JDM

Ginge: My processing steps (more or less)

- Deconvolution to L with DPSF, applied the deconvolution only to the brigther zones.
- RGB combination with the parameters defined by excalibrator.
- SCNR to the green
- Histogram transformation to both RGB and L images, linear fit the L's
- Combination of the final LRGB and histogram transformation
- HDRWT to the brighter part of the image minus the stars, to avoid the black centers
- LocalHistogramEqualization to the weak parts, increasing contrast
- Morphological transform with a star mask and then a ATWT to get smooth stars back
- Weak ATWT to brighter parts (not stars!) to recover the contrast lost
- ACNR to the crominance
- Greycstoration to the luminance with various masks

Lex: 5 years of savings, and 5 years of credit . I'm not rich, but a dream is a dream.

Yuriy Toropin: to avoid star bloating, and because I don't have any special reason to go with larger subs. In narrowband I go with 30 min subs always, but there it's quite clear that I have to expose more time

Thanks all!

[Lex]

Hehe, i started saving also 
So maybe in 10 years i could show pictures like yours

Again; your results are impressive!

Congrats