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Tuesday, September 15, 2015

Pickering's Triangle, my first light for the Autumn season 2015

This is my opening photo for the Autumn season 2015. I started this imaging project a year ago, at Autumn 2014. Back then I shot 12h of the light form an ionized oxygen, O-III. This is a two frame mosaic of the Veil Nebula supernova remnant. This Autumn I shot 5h of light from an ionized hydrogen, H-alpha. I was able to make a Hubble palette image by using the S-II from my older wide field photo of the Veil Nebula.

Pickering's Triangle
Be sure to click for a large image!

Part of the two frame mosaic of the Veil Nebula supernova remnant, the Pickering's Triangle.
Colors are from the ionized elements, Hydrogen, Sulfur and Oxygen. 
S-II = Red, H-alpha = Green and O-III = Blue. 

Same area in light of an ionized oxygen only
(A content of this O-III image can be seen as a blueish color at image above.)

Pickering's Triangle in light of an ionized oxygen, O-III, alone.

A zoom out series to the whole two frame mosaic

A closeup
Click for a large image

A less zoomed version
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The whole two frame mosaic
Click for a large image

A two frame mosaic of the Pickering's Triangle

A wide field photo of the Veil Nebula supernova remnant

The Pickering's Triangle can be see at one o'clock position.
My blog post about the wide field shot 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 33% 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, 15 x 1200s = 5h
O-III, 36 x 1200s binned = 12h (Autumn 2014)
S-II,  from my older wide field photo of the Veil Nebula = 3h 
Total 20h

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