NGC2244 Rosette in Ha, popular and lovely!

[Barry-Wilson]

With such limited opportunity for imaging I thought I'd post this image as there is no chance any time soon to capture more data . . . but I'm ever hopeful that Devon's skies will clear so I can do this target justice with a beautiful HaRGB rendition.

Only 1 hour total integration (3 x 1200s), but I do benefit from reasonably dark skies and a fast scope .  I also used the new PI script Mure Noise Reduction on the linear stack and it has helped with the fine grained back ground noise, especially with such limited signal.  Only a light touch to the processing too.

Hi res here, http://astrob.in/237827/0/

I chose to frame this to show some space around the nebula and also to develop the 'stem'.  Much more to do here but it such a beautiful nebula.

Thanks for looking.

[Akiainavas]

That's an absolutely amazing photo Barry. Great work!

[swag72]

Nice one Barry!!! Looks great!!

[Martin-Devon]

Really excellent image Barry, lots of lovely fibrous nebulosity emanating out from the Rosette as well, which shows how well you've captured & processed this image. Top drawer.

Martin

[cfpendock]

Three frames?  Incredible!  The noise reduction seems to have worked a treat.

Chris

[scotttumsh]

I like that picture wow!

[theo]

That really is a superb result for an hour. Very nicely processed also Barry!!

Pete

[Barry-Wilson]

Thanks everyone.  The Kodak chip is no slouch and maybe this capture shows that.

I'm on the very edge of Totnes surrounded on 3 sides by farmland and no street lights and this really helps as you can imagine.

I do find this nebula intoxicating and mesmerising!

I've managed a single 300s red sub since capturing the Ha . . . if only clear skies were forecast with the New Moon . . . sigh.

[ollypenrice]

Yes indeed, about as good an hour's worth as I've ever seen!

Olly

[Barry-Wilson]

Thanks Olly. When we've had these brief clear spells the transparency has often been good, the rain having stripped the fine particulate pollution from the sky. The clear spells just need to last a little longer . . .

[strutsinaction]

Hi Barry

Very nice and clean! Thanks for the heads up on the new PI MURE Denoise script. Looks interesting.

Regards
John

[Barry-Wilson]

Thank you John.

Once I'd figured the values to insert in the script it worked remarkable well without losing any detail by blurring.  It will become a standard step in my processing workflow.

[swag72]

Sounds like an interesting script Barry - i did look at it once and then my head exploded and that was that

[Barry-Wilson]

2 hours ago, swag72 said:

Sounds like an interesting script Barry - i did look at it once and then my head exploded and that was that

Ha Ha LOL! Pixinsight can be like that I know!

This topic on the PI forum helped me, http://pixinsight.com/forum/index.php?topic=9206.0.

Before reading this I hadn't dared take the plunge to experiment as it did look intimidating.  I inserted '0.5' into the Gain box (from the QSI website), inserted '10' into the Gaussian Noise box (a guesstimate after following the topic and tutorial), inserted the number of subs in the stack and left the rest as default . . . and Hey Presto! Much reduced fine-grained speckle in the background sky.  You must run this script on the linear stack for each channel (eg before you combine any R, G or B; straightforward for NB channels as not a colour channel) and I also did so before any DBE and cropping.

I've been following the thread on sub-length/number/SNR from Olly's Rosette post too.  My Rosette has 1200s subs . . . wonder if this length is an optimum?  Haven't carried out any analysis though.

[laudropb]

Very nice piece of work.

[gnomus]

On 8 February 2016 at 21:00, Barry-Wilson said:

Ha Ha LOL! Pixinsight can be like that I know!

This topic on the PI forum helped me, http://pixinsight.com/forum/index.php?topic=9206.0.

Before reading this I hadn't dared take the plunge to experiment as it did look intimidating.  I inserted '0.5' into the Gain box (from the QSI website), inserted '10' into the Gaussian Noise box (a guesstimate after following the topic and tutorial), inserted the number of subs in the stack and left the rest as default . . . and Hey Presto! Much reduced fine-grained speckle in the background sky.  You must run this script on the linear stack for each channel (eg before you combine any R, G or B; straightforward for NB channels as not a colour channel) and I also did so before any DBE and cropping.

I've been following the thread on sub-length/number/SNR from Olly's Rosette post too.  My Rosette has 1200s subs . . . wonder if this length is an optimum?  Haven't carried out any analysis though.

Great image Barry.  Coincidentally I am capturing some Ha of the Rosette as I read your thread.  Regarding the PI script, do you run this on the stack without using a mask?

Steve

[Barry-Wilson]

I've managed to capture a further hour of Ha and also an hour each of RG&B.  I think the best opportunity this year for a HaRGB image with the weather outlook.  I would really love to capture more but I fear it will be next year, but pleased nevertheless for my version to join the recent clutch of excellent Rosettes. Thanks for looking.

Hi res here, http://www.astrobin.com/237827/B/.

[astroman001]

Thats a beautiful image, the wider field helps show off the nebula shape, well done

Peter