Monday, November 16, 2020
G65.3+5.7 , large supernova remnant in Cygnus, project continues
Five new frames added, project will continue soon since I'm soon able to joint this new mosaic image to a much large mosaic of the area! Here is a previous single frame version of this SNR, https://astroanarchy.blogspot.com/2020/11/a-supernova-remnant-in-cygnus-g65357-snr.html
This is a rarely imaged target, this is also one of the most difficult targets, I have ever shot. Due to a very dense star field, large angular dimension and a very diffused structure this is much more difficult target, than a Simeis 147 supernova remnant in Taurus. Total exposure time of 20h was needed to have this image. The imaging system is very fast since it's undersampled and that's good when I want capture a very large, dim and diffused targets like this one. My current imaging system, https://astroanarchy.blogspot.com/2020/01/the-frankenstein-monster-my-current.html
G65.3+5.7 SNR has a large angular dimensions, than brighter and more famous supernova remnant in Cygnus, the Veil Nebula. The angular dimensions are about 3x4 degrees. This is a very difficult target, it has a very low surface brightness and the starfield is extremely dense in this part of the Milky Way.
NOTE, the "noise" in the photos is not a noise at all, it's glow from countless stars,
it can be seen best in full size photo!
it can be seen best in full size photo!
G65.3+5.7 SNR as a six frame mosaic
Please, click for a large image, it's worth it!
There are very few images out of this dim and diffused supernova remnant around. Image is in mapped colours, from the emission of ionized elements, R=Sulphur, G=Hydrogen and B=Oxygen.
An experimental starless version
A closeup
click for a large image
This is a full resolution close up from the photo to show, how dense the star field really is!
Orientation in Cygnus
click for a large image
Technical details
Processing workflow
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
Tokina AT-x f2.8 camera lens
Mount
10-micron 1000
Cameras and filters
Imaging camera Apogee Alta U16 and Apogee seven slot filter wheel
Guider camera, Lodestar x 2 and an old spotting scope of Meade LX200
Astrodon filters,
5nm H-alpha 3nm S-II and 3nm O-III
5nm H-alpha 3nm S-II and 3nm O-III
Total exposure time
H-alpha, 24 x 1200 s, binned 1x1 = 8 h
O-III, 24 x 1200 s, binned 1x1 = 8 h
S-II, 12 x 1200 s, binned 2x2 = 4 h
Subscribe to:
Post Comments (Atom)
No comments:
Post a Comment