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Tuesday, November 10, 2015

More filaments of Cygnus and couple of planetary nebulae



I just got this photo processed. It's showing an area near the Propeller Nebula, I noticed this dim planetary nebula candidate,  PN PM 1-320, back in 2011 while I was shooting the Propeller Nebula with my 300mm Tokina lens. At the same image field there is another planetary nebula too, PK 84+9.1


Filaments of Cygnus with couple of planetary nebulae
Click for a large image

Image in mapped colors from the light emitted by ionized elements. Red=Sulfur, 
Green=Hydrogen and Blue=Oxygen. A large blueish spot at middle left is a PN PM 1-320. 
A small pale red dot at upper right is a planetary nebula PK 84+9.1


An experimental starless view
Click for a large image

It looks to me, that the PN PM 1-320 forms a bubble shaped shock front in the interstellar gas.


Closeup of the PN PM 1-320



Closeup of the PK 84+9.1



Wide field image of the area

A pale bluish area at upper right is the PK 84+9.1 This image was taken at Autumn 2011, original blog post can be seen here: http://astroanarchy.blogspot.fi/2011/10/first-light-for-autumn-season-2011.html


Technical details

Processing work flow

Image acquisition, MaxiDL v5.07.
Stacked and calibrated in CCDStack2.
Deconvolution with a CCDStack2 Positive Constraint, 21 iterations, added at 25% weight
Color combine in PS CS3
Levels and curves in PS CS3.

Imaging optics
Celestron Edge HD 1100 @ f7 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 x2 and SXV-AOL



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

Exposure times
H-alpha, 9x 1200s = 3h
O-III, 6 x 1200s binned = 2h 
S-II, from an older wide field photo = 1h 
Total 6h


www.tips-fb.com Posted by J-P Metsavainio at 6:37 PM 0 comments
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Monday, November 9, 2015

Filaments of Cygnus


There are lots of dim gas filaments at west side of the Cygnus nebula complex. I have spent this Autumn season by shooting them. Due to close proximity of brighter and more eye catching nebulae in Cygnus, this area is not very commonly imaged.


Filaments of Cygnus
Click for a large image

Natural color composition from the emission of ionized elements.


Filaments of Cygnus in HST-mapped colors
Click for a large image

Image in mapped colors from the light emitted by ionized elements. 
Red=Sulfur, Green=Hydrogen and Blue=Oxygen.


An experimental starless version
Click for a large image

The actual nebula is easier to observe in this starless photo


A closeup

Interesting shapes in the nebula, they must be some kind of shock fronts


Orientation in the constellation Cygnus
Click for a large image

The area of interest is marked as a white rectangle in this 18-panels narrow band mosaic of the Cygnus.


Technical details

Processing work flow

Image acquisition, MaxiDL v5.07.
Stacked and calibrated in CCDStack2.
Deconvolution with a CCDStack2 Positive Constraint, 21 iterations, added at 25% weight
Color combine in PS CS3
Levels and curves in PS CS3.

Imaging optics
Celestron Edge HD 1100 @ f7 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 x2 and SXV-AOL

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

Exposure times
H-alpha, 15 x 1200s = 5h.
O-III, 6 x 1200s binned = 2h
S-II,  6 x 1200s binned = 2h
Total 9h




www.tips-fb.com Posted by J-P Metsavainio at 11:12 AM 0 comments
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Sunday, November 8, 2015

Sharpless 114, Sh2-114, the Flying Dragon Nebula



I have spent this Autumn season by shooting rarely imaged dimmer targets around Cygnus. So far I have stayed at Western parts of Cygnus nebula complex. This time I picked a target form the Eastern side, Sh2-114, the Flying Dragon Nebula. There are very few images out of this dim nebula.

This is a preliminary processing, I will shoot more exposures for this, whenever weather up here allows me to do so.

Sharpless-114, the Flying Dragon Nebula
Click for a large image

Image in mapped colors from the light emitted by ionized elements. 
Red=Sulfur, Green=Hydrogen and Blue=Oxygen.

 A closeup
Click for a large image



An experimental starless version
Click for a large image

The actual nebula is easier to observe in this starless version. At center left, there is an odd looking corkscrew like  formation of glowing hydrogen and sulfur pointing upwards left. The pale bluish dot at top right is a bipolar planetary nebula Lan 384 or currently known as Kn 26.


Image in visual spectrum
Click for a large image

Natural color composition from the emission of ionized elements. 


INFO

Sh2-114 is a complex and unusual HII emission nebula. Its complex, wispy structure is likely the result of winds from hot, massive stars interacting with the magnetic fields in the interstellar medium. But very little is known about it. (Source, https://www.noao.edu/image_gallery/html/im1112.html)

There is a planetary nebula at the same field of view, Lan 384 (Kn 26)
Using existing digital sky surveys, Jacoby et al. (2010) presented Kn 26, a bipolar PN candidate known for a long time as the emission line source Lan 384. Here we present high spatial-resolution optical and near-IR narrow-band images of this nebula, high-dispersion long-slit echelle spectra, and low-resolution spectroscopy. The new data confirm the PN nature of Kn 26 and reveal features typical of bipolar PNe: butterfly morphology, H2 emission, and nitrogen enrichment. A detailed analysis of the morphology and kinematics, however, suggests the possible presence of two pairs of bipolar lobes that would make Kn 26 a new member of the class of quadrupolar PN.  (Source, http://www.iac.es/congreso/iaus283/pages/meeting/view-abstract.php?aid=138)


Lan 384 closeup

Info from Simbad database, http://simbad.u-strasbg.fr/simbad/sim-id?Ident=Lan+384
Some latest info confirms this a s bipolar planetary nebula, http://www.iac.es/congreso/iaus283/pages/meeting/view-abstract.php?aid=138


Technical details

Processing work flow

Image acquisition, MaxiDL v5.07.
Stacked and calibrated in CCDStack2.
Deconvolution with a CCDStack2 Positive Constraint, 21 iterations, added at 25% weight
Color combine in PS CS3
Levels and curves in PS CS3.

Imaging optics
Celestron Edge HD 1100 @ f7 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 x2 and SXV-AOL



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

Exposure times
H-alpha, 9x 1200s = 3h
O-III, 3 x 1200s binned = 1h 
S-II,  3 x 1200s binned = 1h 
Total 5h




A single uncropped, calibrated and stretched 20 min. H-alpha frame as it comes from the camera







www.tips-fb.com Posted by J-P Metsavainio at 11:29 AM 2 comments
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Saturday, October 31, 2015

Filaments of the Western Cygnus


I have spent some clear nights by shooting dim gas structures in Western part of the nebula rich constellation Cygnus. This area of Cygnus is not commonly imaged due to low surface brightness and close proximity of more eye catching nebulae. My previous project of Western Cygnus can be seen in this blog post.

This time I shot a formation around the magnitude 3,96 star, OMI02 Cygni. It can be seen as a most brightest star at middle right. This is a two frame mosaic image.

Filaments of Cygnus
Please, click for a large image

Filaments of glowing gas around the star OMI02 Cygni. Image is in mapped colors from the light emitted by the ionized elements. Red=Sulfur, Green=Hydrogen and Blue=Oxygen.


An experimental starless version
Please, click for a large image

In this starless version the gas filaments can be seen better. (I let a one star for a compositional reasons.)


Closeups




Image in visual spectrum
Please, click for a large image

Natural color composition from the emission of ionized elements. 
This palette is very close to a visual spectrum.


Images in this post are a small part of the Cygnus nebula complex
Please, click for a large image, 2200 x 1400 4,2MB

A 18-panels narrow band mosaic of the constellation Cygnus. Area of interest can be seen at about eleven o'clock  position in this image.

Technical details

Processing work flow

Image acquisition, MaxiDL v5.07.
Stacked and calibrated in CCDStack2.
Deconvolution with a CCDStack2 Positive Constraint, 21 iterations, added at 25% weight
Color combine in PS CS3
Levels and curves in PS CS3.

Imaging optics
Celestron Edge HD 1100 @ f7 with 0,7 focal reducer for Edge HD 1100 telescope
Canon EF 200mm f1.8 lens

Mount
10-micron 1000

Cameras and filters
Imaging camera Apogee Alta U16 and Apogee seven slot filter wheel
Guider camera, Lodestar x2 and SXV-AOL
QHY9 for S-II and O-III emsissions

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

Exposure times
H-alpha, 24 x 1200s = 8h
O-III, 8 x 600s = 1h 20min.
S-II,  8 x 600s = 1h  20min.
Total 10h


A single uncropped, calibrated and stretched 20 min. H-alpha frame as it comes from the camera
Left frame of the mosaic
Right frame of the mosaic, this is not a bright object





www.tips-fb.com Posted by J-P Metsavainio at 2:33 PM 0 comments
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