Tarantula 8 hour data set

Paul Haese · #1 18-11-2009, 03:45 PM

Just as the big Sid likes to add more data his image set I now have double the data. The idea is to show you a progression of the image of the next month or so.

the data is as follows.

Luminance 110 minutes
Ha 110 minutes
Red 85 minutes
Green 75 minutes
Blue 105 minutes

I once again did a screen Ha Lum blend at 65%. I might later do a different blend to see what the results are like.

Click Here for image

Comments most welcome.

multiweb (Marc) · #2 18-11-2009, 03:59 PM

Pretty cool. Can't remember the first installement but it does look smooth and very detailed. Nice work.

What do you stack with?

iceman (Mike) · #3 18-11-2009, 04:05 PM

Lovely image Paul, very smooth and detailed. You'd have to be happy with that!

Paul Haese · #4 18-11-2009, 04:05 PM

Marc I am using CCDstack for image stacking and combining. The PS CS3 for final work. Thanks.

Paul Haese · #5 18-11-2009, 04:18 PM

Thanks Mike, always looking to improve but I am certainly happy with the results so far.

bluescope · #6 18-11-2009, 04:36 PM

Nice to see the central cluster not burned out Paul ... look forward to the addition of the further 6 hours of data ... should be stunning based on this image so far.

Jen · #7 18-11-2009, 04:42 PM

wow Paul thats a stunner that one very nice

TrevorW · #8 18-11-2009, 05:13 PM

Top Notch

DavidU (Dave) · #9 18-11-2009, 05:25 PM

That's a hell of an image bigfella

Still just a tad of field curvature.

multiweb (Marc) · #10 18-11-2009, 05:33 PM

Quote:

Originally Posted by Paul Haese

Marc I am using CCDstack for image stacking and combining. The PS CS3 for final work. Thanks.

I've been using CCDStack for over 2 years too now. It's a great program to do data rejection. But recently I have increasingly been using registar to align my subs, especially when adding data taken at different dates or even with different scopes. Once the subs are aligned I save them as 16bits FITS as is then load them in CCDStack and work out normalisation, data rejection and stacking there. I have found CCDIS star pattern matching to let me down at times and CCDStack other registration methods don't cut it, compared to registar. I don't know if you've ever tried registar for the sole purpose of sub registration but give it a go. It's worth every cent IMHO.

Paul Haese · #11 18-11-2009, 05:46 PM

Thanks all much appreciated.

Marc, I have found when using data sets from different nights that doing the following works. Select the 6 stars then go to FFT and do an align rotate and scale. This gets it really close then go back to star snap and click on align there. It just all snaps together from there. It seems to get rid of the rotational issues.

I agree CCD stack is a great program for doing a lot of tasks that is needed to be done.

multiweb (Marc) · #12 18-11-2009, 06:00 PM

Quote:

Originally Posted by Paul Haese

Thanks all much appreciated.

Marc, I have found when using data sets from different nights that doing the following works. Select the 6 stars then go to FFT and do an align rotate and scale. This gets it really close then go back to star snap and click on align there. It just all snaps together from there. It seems to get rid of the rotational issues.

I agree CCD stack is a great program for doing a lot of tasks that is needed to be done.

No doubt it will align similarly scaled subs if you only need to translate, rotate or scale but it won't warp anything. As a test I've redone a stack on Eta. I had Ha, Oiii & Sii taken at different dates. The stacking became an issue because my optics are not top quality and I also use an MPCC. Same focus but using different filters gave me subs with stars in different places especialy on the edges of the frame. The stacking worked in the center but the outer edges didn't match. Registar did warp the subs accordingly and everything was back in place. Another one was a 4 panel mosaic with very little overlap on the LMC. Again CCDStack did a half baked job by rotating, translating and scaling. Some of the stars matched, some didn't. All the subs in the mosaic were still rectangular in shape. I did the same in registar. The reference sub I started on was rectangular, the second one was curved and the last one was shaped like a banana and everything matched. Finally you might have seen a post I did a while ago of the HH heavily cropped both in Ha and RGB. I used absolutely every subs I ever did on the HH and threw everything in registar. ED80, 5" Newtonian and even some 2xbarlowed shots. Registar aligned everything flawlessly. I then did the stacking in CCDStack

suma126 (Shane) · #13 18-11-2009, 06:59 PM

PAUL THAT IS AWESOME .THATS THE BEST ONE YOU HAVE POSTED USING RC OTA SO FAR.

scopemankit (Chris) · #14 18-11-2009, 07:08 PM

Stunning image, Paul

AlexN · #15 18-11-2009, 07:57 PM

10 Points mate... Great job.

Hagar (Doug) · #16 18-11-2009, 08:36 PM

Very nice Paul, The detail is magnificent. Looks like you have tammed the camera and scope now and can get back to learning and enjoying the actual imaging again.
I actually liked the more saturated version you posted earlier and think a nice blend of both would make a real awsome image both in detail and colour.

gregbradley · #17 18-11-2009, 08:45 PM

Woohooo that's a beauty.

Nice one Paul.

Greg.

zipdrive (Dave) · #18 19-11-2009, 12:18 AM

8 hours...very impressive, excellent work!

StarGazing (Alex) · #19 19-11-2009, 12:34 AM

Great stuff Paul, you should be exctatic about the result. Keep up the great work.
Alex...... I get a tiny bit jealous with you astrography people

spearo (Frank) · #20 19-11-2009, 06:40 AM

great shot
nice detail, no burnt out core
well done mate!
frank