IC2948 (running chicken)

[gvanhau]

Taken on 22 Jan 2012 From Cajon del Maipo at 50Km from Santiago de chile
Object IC2948-IC2944 (Running Chicken Nebula)  and HE2-72
Camera: Canon Xsi IR mod
Telescope: WO 98FLT with WO IV flattener
Mount: CG5 with Syncscan kit
Exposure: 20*180s at ISO 800 + 6*240s at ISO 1600
Guiding PHD - QHY5 - 90/400 refractor
Capture soft=APT 
Processing= 100% PixInsight 1.7

Feedback welcome.

Tomada el  22 enero 2012  desde el  Cajon del Maipo a 50Km de Santiago de chile
Objecto: IC2948-IC2944 (Running Chicken Nebula)  y la planetaria HE2-72
Camara: Canon Xsi con filtro Ir modificado
Telescopio: WO 98FLT con aplanador WO IV
Montura: CG5 con kit Syncscan
Exposición: 20*180s a ISO 800 + 6*240s a ISO 1600
Guiado PHD - QHY5 -  refractor 90/400
progama de Captura APT 
Procesado= 100% en PixInsight 1.7


Full resolution at http://www.flickr.com/photos/astro_gvanhau/6799286301/sizes/o/in/photostream/

[Josh Lake]

Beautifully done! Looks very proper and well-color-calibrated to me.

One question: did you do any Morphological Transformation to slightly reduce the stars and enhance the nebula? I've found this very handy in fields full of foreground stars.

[gvanhau]

Thanks Jlake

I didn't do Morphological Transformation, but what I Did was separating stars from DSO (using Wavelets an pixel math), Stretch DSO and then recombine with stars. (this is the first time I do it this way).

Regards
Geert

[pfile]

that is a very interesting idea. i have extracted the stars using atrous in order to make masks but i never thought to do the processing without the stars and then recombine.

how many scales did you remove? when you stretch the image without stars, don't you see some star halos?

[gvanhau]

Hello
I preserved the first 6 layers as stars.
Then substacted this from the original to get the DSO.

Yes, I got a big halo arround the bright star in the middle, but I reduced it using the StarHaloReducer script.
There is still a lighter halo arround  the red star (bottom left) but I did not touch it.

Regards
Geert