The Wolf SL17 21 hours

[Paul Haese]

SL 17 lies very close to Gum55 and The Dark Tower. It is a dark nebula which is surrounded by an area of hydrogen alpha. Located in the constellation of Scorpius, it can be found at co-ordinates of RA 16hr 54m 01s and Dec -43 36' 17".

The image contains nearly 21 hours of data.

Ha 12.25 hours
Red 3 hours
Green 2.83 hours
Blue 2.66 hours

Click here (http://paulhaese.net/DarkNebulaSL17.html)for larger image

[RickS]

Lovely find, Paul. It looks great in colour.

[DJT]

What Rick Says, Paul. Great FOV as well. Interested to see surrounds at some point.

:thumbsup:

[troypiggo]

Awesome! What's the field of view there? Haven't heard of SL catalogue. Must look into it. Really nice and unique image.

[Shiraz]

yep, that's a real winner Paul - kudos due. regards ray

[marc4darkskies]

Brilliant Paul! :thumbsup::thumbsup:

I see an IOTW or perhaps even an APOD in your future!

Cheers, Marcus

[Rigel003]

Marathon effort with the exposures, and well worth it. Fascinating field, and the wolf itself is very dramatic. The halos are quite moderate for the exposure time. Looks very sharp at about 1600 pixels across - fits on my monitor then.

[gregbradley]

Sensational Paul. One of your best. It has a glow about it. The long hours really shows.

Greg.

[Paul Haese]

Thanks guys, I really appreciate everyone's comments.



Thanks Troy, the field of view is 81.2 minutes x 105.7 minutes.



Thanks Marcus, that is indeed high praise.



At full res (my website image is 90% of full res) the image is sharp but huge. The halos are a product of the reducer I think. Even with the new filters I am getting the same problem as the last lot of filters, albeit slightly better.



Thanks Greg, Martin told me that 20 hours is the minimum for integration and I can do this now with automation, using a rotator across the meridian is great and helps a lot with data collection.

[Ross G]

What a great photo Paul.

Looks amazing in colour.

I agree with the others...definitely an award winner!


Ross.

[Stevec35]

Very nice image Paul. The detail is extremely good.

Cheers

Steve

[RobF]

Quality work for sure Paul, and a nice out of the ordinary object. Thanks for sharing the hard work.

[batema]

I think it looks fantastic and i am on my mobile phone so i will now put this down and view it on my 17" monitor.

[batema]

Wow.

[Paul Haese]

Thanks guys for your responses, is one is much appreciated.

[graham.hobart]

Thats just brilliant!
Thanks for showing
regards
Graham.

[rustigsmed]

The black wolf! great photo, thanks for sharing Paul.

[DavidU]

A corker Paul, awesome.

[tilbrook@rbe.ne]

Great work Paul!

The dark nebula really stands out in the soft colours of the surrounding HA.

Very interesting nebula, how did you find this one?
I notice you have diffraction spikes, what did you use to put them in?

Cheers,

Justin.

[Paul Haese]

Thanks guys for your input, much appreciated.


Justin, I found this nebula by pure accident. I was looking for the dark tower in Scorpius and found this close by. I did one sub in Ha and decided to stick with this one.

It appears like I have diffraction spikes but I think this is a product of my imaging system. I noticed some time ago that Martin Pughs wide field images had a similar look so I guess this might have something to do with the Takahashi scopes. Or there is something with the sensor I am using. In any event it is not deliberate on my behalf.

[tilbrook@rbe.ne]

Thanks for the reply Paul,

It would be interesting to find out the reason though.

Cheers,

Justin.

[pvelez]

Jeepers that is good! Another worth trying some time

Thanks for sharing Paul

Pete

[marco]

Very beautiful Paul, love this area and the colors you got!:thumbsup::thumbsup:

Clear skies
Marco

[JZ]

Lovely shot Paul! :thumbsup:
What SW do you use to process the data?

Cheers,
Ross...

[Paul Haese]

Thanks Marco and Pete.



Ross I use CCDstack for calibration and stacking and then Photoshop for final image work.

[atalas]

Great target and beautiful work Paul!

[Paul Haese]

Thanks Louie for the compliment

[Moonman]

Proof there that at least part of a great result correlates with time and effort put in. Inspiring image there Paul!

[alocky]

Magnificent image.
Regarding the diffraction spikes, I've noticed some from my QSI683 as well, even though there's nothing in the imaging train that should induce them. My understanding is that it's the edges of the microlenses on the sensor. Still, they're not exactly intrusive.
cheers,
Andrew.

[strongmanmike]

Looks good with some colour added Paul but I think I prefer the B&W version.

Amazing dark feature that Wolf/Eagle :)

Mike

[Paul Haese]

Thanks Michael for the comment.



Ahh yes that is most likely it. I seem to recall something in the discussion groups about micro lenses cause some artefact but I did not read enough to make this connection.



Yes the mono version does have some nice appeal. If you click the link you can see the full res version of that with 12.25 hours.
I have attached a small image of it here.

Click here (http://paulhaese.net/DarkNebulaSL17Ha.html)for link

[Phil Hart]

I'm a fan too Paul. Colours of the stars, nebula and background all nicely balanced. A great little frame.

Phil

[SkyViking]

Very very nice Paul, one of your best I think! And thanks for finding such a gem of a target too. Now I'm inclined to have a go as well, but it already seems to be the flavour of the month... :)

Very interesting about the diffraction spikes too, I noticed exactly the same in my 120 hour CenA image. I wondered what on earth could have caused a second set of faint spikes perfectly ortogonal with the frame (my normal spikes from the spider are at an angle). Must be the microlenses as you say, and it apparently only shows with sufficient integration time.

[Paul Haese]

Thanks Phil, seems I may have started a bit of a trend.



You might as well have a go Rolf. Seems there are a few interested in this target.

Yes a bit of a mystery on the spikes. Occams razor works with the microlensing at present.

[Elio]

what a beauty :thumbsup:

[Leonardo70]

Fantastic Paul ... wonderful.

All the best,
Leo

[iceman]

Crazy object. Great image!

It's now IOTW (http://www.iceinspace.com.au)!

[Paul Haese]

thanks guys, appreciate you giving your opinions.

Thanks Mike, totally unexpected, but appreciated.

[E_ri_k]

That's really awesome Paul! You can easily see how this nebula get's it's name;) It stands out so clearly. Well done :)

Erik

[Leonardo70]

Congrats Paul ... fantastic image.

All the best,
Leo

[multiweb]

Congrats on IOTW. Great vista. :thumbsup:

[SkyViking]

Congratulations Paul, that's certainly well deserved :)

[Paul Haese]

Thanks all for the well wishes.

[Ross G]

Congratulations on IOTW Paul.

A great photo.


Ross.

[naskies]

Superb! Thanks for sharing the find and for your image.

[Paul Haese]

Thanks guys, your comments are appreciated.

[Shiggy]

Fantastic image! Beautifully framed.

[Jo41]

fantastic!!!

[jase]

Top shelf, Paul! Love the composition, colours and contrast. A unique viewing experience that is memorable, which these days its darn hard to achieve. Well done. Looking forward to your next instalment.

[Paul Haese]

Thanks Jase. Trying to get some time to do the next project is a little hard at the moment. Not enough clear skies, but more will come I am sure.