Monday, August 22, 2016
Pickering's Triangle reprocessed
This shot about the Pickering's Triangle was my opening image for the Autumn season 2015.
It was also selected for a Astronomy Picture of the Day (APOD) by the NASA.
I'm waiting to new imaging season to start. To practise my astronomical image processing skills, I have reprocessed the whole dataset, about 20 hours of exposures.
Be sure to click for a large image!
A closeup
Be sure to click for a large image!
An experimental starless version
Be sure to click for a large image!
The whole two frame mosaic in cinemascope format
Be sure to click for a large image!
A wide field photo shows the whole 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
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, 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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