Saturday, November 17, 2012
Witch's Broom Nebula
Filaments in the Western Veil
Supernova remnant in Cygnus
Image is in visual spectrum, composed from H-a and O-III narrowband channels.
This is a third detail image from the Veil Nebula supernova remnant from this Autumn season.
Two others can be seen here, IC 1340 in Eastern Veil and the Pickering's Triangle.
The Veil Nebula locates in constellation Cygnus at distance of about 1400 light years. The angular size of the image is close to size of the full Moon. The bright star at upper right corner is 52 Cygni, it's a foreground star and unrelated to the supernova remnant.
Orientation
Area of interest is marked as a white rectangle.
Image in HST-palette
19.11.2012
I made a HST-palette version out of this. I have shot the Veil Nebula with much wider field instruments, Tokina AT-X 300 f2.8 and the Canon EF 200mm f1.8 cameraoptics. I took the color information from the wide field image and used it with this detail image. Here is the result.
Colors for this HST-palette image are borrowed from a wider field one, image can be seen here:
http://astroanarchy.blogspot.fi/2012/03/veil-nebula-reprocessed-with-some-new.html
19.11.2012
http://astroanarchy.blogspot.fi/2012/03/veil-nebula-reprocessed-with-some-new.html
An animated image shows the difference between ionized Oxygen and Hydrogen
Click for a large image
Technical details:
Processing work flow:
Image acquisition, MaxiDL v5.07.
Stacked and calibrated in CCDStack2.
Levels, curves and color combine in PS CS3.
Optics, Meade LX200 GPS 12" @ f5
Camera, QHY9
Guiding, SXV-AO, an active optics unit, and Lodestar guide camera 8Hz
Image Scale, ~0,8 arc-seconds/pixel
15 x 1200s exposures for the H-alpha, emission of ionized Hydrogen = 5h
6 x 1200s exposures for the O-III, emission of ionized Oxygen = 2h
4 x 1200s exposures for the S-II, emission of ionized Sulfur = 1h 20min.
Friday, November 16, 2012
Astro Anarchy gets published
Winner image of the Cloudy Nights forum Imaging/Sketching Contest
October 2012
IC 1340, Part of the Eastern Veil Nebula in Cygnus
RA: 20h56m 45.8s DE:+31 degrees07' 17"
Original blog post about this image, with more images and technical details:
Thursday, November 15, 2012
Tuesday, November 13, 2012
Pickering's Triangle, project finalized
The Pickering's Triangle
A detail of the Veil Nebula supernova remnant
Image is in mapped colors, from the emission of ionized elements, R=Sulfur, G=Hydrogen and B=Oxygen.
This combination is generally called to HST-palette. It's used originally by the Hubble Space Telescope.
I managed to shoot enough data for the S-II channel, to build a three channel color image, last night.
It was very windy and i had hard time with guiding. There was some serious technical difficulties with my gears. After spending ten busy hours up in the observatory, I had only four 20 min. S-II frames, duh...
Pickering's Triangle, Simeis 3-188, is a small part of the Veil Nebula supernova remnant in constellation Cygnus.
Veil Nebula is a cloud of ionized gas and dust, leftovers from an exploded star. The star went off some 5000-8000 years ago at distance of about 1470 light years. This, relatively faint target, is difficult to image due to the large angular diameter, about three degrees, and a dense star field.
Orientation
Area of interest is marked as a white rectangle, the apparent size of the Moon can be seen at lower right corner.
Image in natural colors
R=Hydrogen + Sulfur, G=Oxygen and B=Oxygen + Hydrogen.
Technical details:
Processing work flow:
Image acquisition, MaxiDL v5.07.
Stacked and calibrated in CCDStack2.
Levels, curves and color combine in PS CS3.
Optics, Meade LX200 GPS 12" @ f5
Camera, QHY9
Guiding, SXV-AO, an active optics unit, and Lodestar guide camera 8Hz
Image Scale, ~0,8 arc-seconds/pixel
15 x 1200s exposures for the H-alpha, emission of ionized Hydrogen = 5h
9 x 1200s exposures for the O-III, emission of ionized Oxygen = 3h
4x1200s exposures for the S-II, emission of ionized Sulfur = 1h 20min.
Ps.
An animation, stars vs. starless
Sometimes I'm publishing starless versions of my images. The actual nebula stands out better by this way, since human brains has a habit to form false shapes from a group of random dots, like stars.
Subscribe to:
Posts (Atom)
