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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:

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

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

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