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Wednesday, November 22, 2017

Sharpless 119 in Cygnus, project continues



I have published first photo out of Sharpless 119 at 8.11. 2017, since then we have had a full cloud cover. Yesterdat we had about three hours of clear skies and I was able to shoot an other frame next to first one. My target is to make a six panel mosaic image out of the whole Sharpless 119.


Sharpless 119 as a two frame mosaic
Please, click for a full size photo

Image is in mapped colours, from the emission of ionized elements, R=Sulphur, G=Hydrogen and B=Oxygen. The photo covers about two square degrees of sky. (The full Moon spans about 0,5 degrees of sky.)


An experimental starless version
Please, click for a full size photo


In this starless version the shapes in gas and dust are much easier to see.


INFO

Sh2-119, Sharpless 119, is a large complex of emission nebulosity in Cygnus constellation, about 2 degrees east of the North American Nebula. It is located just around 68 Cygni, a quite bright star of magnitude 5. (The most bright star in the photo)



A wider field image of the area, Canon 200mm f1.8 lens
Please, click for a full size image

Sharpless 119 can be seen at lower left corner. The white rectangle shows the location of the new photo. It spans about a square degree of sky. (The full Moon spans about 0,5 degrees of sky.)
This photo was taken with the Canon EF 200mm f1.8 lens and the QHY9 astrocam, Baader narrowband filter set at 2012.


An other wide field shot, Tokina AT 300mm f2.8 lens

More info about this photo HERE



Technical details

Processing work flow

Image acquisition, MaxiDL v5.07.
Stacked and calibrated in CCDStack2.
Deconvolution with a CCDStack2 Positive Constraint, 33 iterations, added at 50% weight
Color combine in PS CS3
Levels and curves in PS CS3.

Imaging optics
Celestron Edge HD 1100 @ f10 with 0,7 focal reducer for Edge HD 1100 telescope

Mount
10-micron 1000

Cameras and filters
Imaging camera Apogee Alta U16 and Apogee seven slot filter wheel
Guider camera, Lodestar x 2 and SXV-AOL

Astrodon filter, 5nm H-alpha

Exposure times

H-alpha, 30x 1200s, binned 2x2 = 10h
O-III and S-II channels are borrowed form my older wide field photos.











Tuesday, November 14, 2017

An other detail from the Southern Cygnus


This has been the most cloudy Autumn season in twenty years.
I'm still processing material from couple of clear nights we had this Autumn. I made another individual image out of the material, I shot for the WR 134 mosaic image.


An other nameless detail from the Southern Cygnus
Please, click for a full size photo

Image is in mapped colours, from the emission of ionized elements, R=Sulphur, G=Hydrogen and B=Oxygen.


Image in visual spectrum
Please, click for a full size photo

Image is in Natural color palette from the emission of ionized elements, R=Hydrogen + Sulphur, G=Oxygen and B=Oxygen + 10% Hydrogen to compensate the missing H-beta emission.


The mosaic image
Please, click for a full size photo


The area of interest can be seen at bottom left.


The location in Cygnus
Please, click for a full size photo


The area of the mosaic image above is marked as a white rectangle.
Info about this large mosaic image can be seen HERE


Technical details

Processing work flow

Image acquisition, MaxiDL v5.07.
Stacked and calibrated in CCDStack2.
Deconvolution with a CCDStack2 Positive Constraint, 33 iterations, added at 50% weight
Color combine in PS CS3
Levels and curves in PS CS3.

Imaging optics
Celestron Edge HD 1100 @ f10 with 0,7 focal reducer for Edge HD 1100 telescope

Mount
10-micron 1000

Cameras and filters
Imaging camera Apogee Alta U16 and Apogee seven slot filter wheel
Guider camera, Lodestar x 2 and SXV-AOL

Astrodon filter, 5nm H-alpha
Astrodon filter, 3nm O-III
Astrodon filter, 3nm S-II

Exposure times

H-alpha, 21 x 1200s, binned 2x2 = 7h
O-III, 6 x 1200s binned 4x4 = 2h 
S-II,  6 x 1200s binned 4x4 = 2h 
Total 11h


Monday, November 13, 2017

A miss shot



Now and then something goes wrong... Especially when the target is very dim, it's very easy to miss the whole target while aiming to it.
I was shooting my first light for the Autumn season 2017 and I thought that my telescope was centred to the WR 134. It was not, instead I shot some dim filaments of gas and lots of stars next to actual target.

Not much a photo but I didn't want to waste three hours of exposures so I made this image out of them. Color data is borrowed from my older mosaic image of the area.


A miss shot
Please, click for a full resolution photo



A large image of the area
Please, click for a full resolution photo

The area in the small photo above is marked with a white rectangle.



Sunday, November 12, 2017

WR 134, Ring Nebula in visual colors


I have published a mapped color version of WR 134 in Cygnus. Now I have made a visual color composition out of the narrow band channels, H-alpha, O-III and S-II. This composition is very close to a visual spectrum. The most powerful emission is from ionzed hydrogen, H-alpha. It emits light at red wavelength as well as ionized sulfur, S-II. Ionized oxygen, O-III, can be seen as blue color. There are very few photos out of this object. There are total 33 hours of exposures in this composition.


A mosaic image of WR 134 area in Cygnus
Please, click for a large image.


Image is in Natural color palette from the emission of ionized elements, R=Hydrogen + Sulphur, G=Oxygen and B=Oxygen + 10% Hydrogen to compensate the missing H-beta emission.


A closer look
Please, click for a large image.




A vertical composition
Please, click for a large image.




INFO

This image shows a ring-like nebula traced by the glow of ionized hydrogen and oxygen gas. Embedded in the region's interstellar clouds of gas and dust, the complex, glowing arcs are sections of bubbles or shells of material swept up by the wind from Wolf-Rayet star WR 134, brightest star near the center of the frame. Distance estimates put WR 134 about 6,000 light-years away, making the frame over 100 light-years across. Shedding their outer envelopes in powerful stellar winds, massive Wolf-Rayet stars have burned through their nuclear fuel at a prodigious rate and end this final phase of massive star evolution in a spectacular supernova explosion. The stellar winds and final supernovae enrich the interstellar material with heavy elements to be incorporated in future generations of stars. (Source, NASA APOD, https://apod.nasa.gov/apod/ap120621.html )


Technical details

Processing work flow

Image acquisition, MaxiDL v5.07.
Stacked and calibrated in CCDStack2.
Deconvolution with a CCDStack2 Positive Constraint, 33 iterations, added at 50% weight
Color combine in PS CS3
Levels and curves in PS CS3.

Imaging optics
Celestron Edge HD 1100 @ f10 with 0,7 focal reducer for Edge HD 1100 telescope

Mount
10-micron 1000

Cameras and filters
Imaging camera Apogee Alta U16 and Apogee seven slot filter wheel
Guider camera, Lodestar x 2 and SXV-AOL

Astrodon filter, 5nm H-alpha
Astrodon filter, 3nm O-III
Astrodon filter, 3nm S-II

Exposure times

H-alpha, 51x 1200s, binned 2x2 = 17h
O-III, 9 x 1200s binned 4x4 = 8h 
S-II,  9 x 1200s binned 4x4 = 8h 
Total 33h