Author Topic: LDN1250 in Cepheus  (Read 1943 times)

Offline starhopper

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LDN1250 in Cepheus
« on: 2013 September 09 10:20:37 »
Hi,
I spent two good nights imaging the dark nebulosity LDN1250 (LBN558) in Cepheus. This target is in good position in the sky for my observing site. I have tried to recall all processing steps. I hope you enjoy it.

Thomas Jäger


The Data:

Object: LBN 558, LDN 1250 in Cepheus
   
Optic: CA300 (300/1140mm Newton) + Newtonmaster (both homemade)
Corrector: Keller 3" Wynne
Filter: Baader 50mm L-RGB
Camera: SBIG STL11000M C2 at -15°C, selfguiding
Software: CCDSoft

Date1:
Exposures: LRGB:48:24:24:24:min, subexposures 8min, 33 flats
2013.09.04, Kreben, Germany

Date2:
Exposures: LRGB:104:56:56:40:min, subexposures 8min, 39 flats
2013.09.06, Kreben, Germany

51 bias, 32 darks

Processing Pixinsight:
- Image Calibration (bias, dark, flat)
- Cosmetic Correction (my STL11000 has serveral dead columns)
- Image Registration (default parameters)
- Image Integratione (L with WinsorizedSigmaClip sigma=4.0, RGB with AvrgSigClipping sigma=2.2)
- ChannelCombination (RGB)
- DBE for RGB
- RGB stretch with STF
- L stretch with MaskedStretchScript (100iteration, m=0.45), HistogrammTransformation
- LRGB-Combination (Lum=0.5, Sat=0.39)
- DarkStructureEnhancement (light)
- SCNR (green)
- MultiscaleProcessing as shown by Daniel Gütl (Austria) in Interstellarum 89
- Saturation and HistogramTransformation with applied Range- and Starmask
Thomas Jäger
www.starhopper.de
12"f/3.8 & 8"f/2.9 Astrograph
SBIG STL11000M, Moravian G2 8300
Vixen Atlux Mount, Skywatcher AZ-EQ6 GT
Skywatcher Esprit 100/550

Offline ajbarr

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Re: LDN1250 in Cepheus
« Reply #1 on: 2013 September 09 11:57:40 »
Beautiful image and processing Thomas. That is as good as it gets.

Albert

Offline Riccardo A. Ballerini

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Re: LDN1250 in Cepheus
« Reply #2 on: 2013 September 09 12:16:02 »
Awesome! :-)

Offline vi100

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Re: LDN1250 in Cepheus
« Reply #3 on: 2013 September 10 00:50:22 »
Beautifull image and very well processed.

Offline starhopper

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Re: LDN1250 in Cepheus
« Reply #4 on: 2013 September 19 13:57:02 »
Thank you for all your comments.
Thomas
Thomas Jäger
www.starhopper.de
12"f/3.8 & 8"f/2.9 Astrograph
SBIG STL11000M, Moravian G2 8300
Vixen Atlux Mount, Skywatcher AZ-EQ6 GT
Skywatcher Esprit 100/550