Saturday, March 7, 2020
Simeis 147 (Sh2-240) with more light from oxygen, O-III
Simeis 147 is a difficult target due to a low surface brightness and a very large angular diameter.
I have published published a mapped color version of this supernova remnant. This time I have composed the narrowband channels to a visual palette. Ionized hydrogen, H-alpha emits deep red light. Since the hydrogen is the most common element in our universum, red is dominating the view.
I have collected now more exposures from light emitted by ionized oxygen, O-III. Now there are some blue hues from O-III light visible in the final image of supernova remnant Simeis 147.
previous version can be seen here, https://astroanarchy.blogspot.com/2020/02/simeis-147-sh2-240-large-supernova_22.html
Simeis 147 (Sharpless 240)
Click for a large image it's worth it!
Note, the relative size of a full Moon is marked as a white circle at bottom left, this is a large object!
Image is in natural color palette combined from narrowband channels, H-alpha, S-II and O-III.
An ionized hydrogen and sulfur are both emitting red light, an ionized oxygen emits blue/turquoise light. Red light from an ionized hydrogen is dominating the view.
An experimental starless version
Click for a large image
The starless version Complex filaments are easier to see in this experimental starless image.
Image is in natural color palette combined from narrowband channels, H-alpha, S-II and O-III.
An ionized hydrogen and sulfur are both emitting red light, an ionized oxygen emits blue/turquoise light. Red light from an ionized hydrogen is dominating the view.
An experimental starless version
Click for a large image
Simeis 147 (sharpless 240), is a very faint and large supernova remnant in constellation Taurus at distance of ~3000 light years. It's constantly expanding at speed of 1000 km/second but due the size of it, we can't see any movement in it. This SN spans over 160 light years and the apparent scale in the sky is about three degrees (Moon has an apparent size of 30" = 0,5 degrees). Explosion took place approximately 30.000 years ago and left behind a pulsar (Neutron star). The pulsar has recently identified.
How long it'll takes to this supernova remnant to expand 1% large when the diameter is 160 light years and it expands at speed of 1000km/second.
How long it'll takes to this supernova remnant to expand 1% large when the diameter is 160 light years and it expands at speed of 1000km/second.
Answer is ~480 years.
(1% of diameter 160/100= 16, as kilometers ~151.372.800.000.00, = Y, km,
1000km/second is ~315.360.000.00, = Z, kilometers/year.
So, X x Z = Y and X=Z/Y, X = 480 with given values)
(1% of diameter 160/100= 16, as kilometers ~151.372.800.000.00, = Y, km,
1000km/second is ~315.360.000.00, = Z, kilometers/year.
So, X x Z = Y and X=Z/Y, X = 480 with given values)
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
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
Total exposure time
H-alpha, 15 x 1200 s, binned 1x1 = 5 h
O-III, 48x 600 s, binned 2x2 = 8 h
S-II, 1 x 12 x 600 s. binned 2x2 = 2 h
Friday, March 6, 2020
The Birth of Venus
I posted yesterday a photo of IC 405 & IC 410 area in constellation Auriga. I noticed that it was partly overlapping with my latest supernova remnant photo, the Simeis 147.
I was able to make a mosaic image from those two photos. I selected this unorthodox composition to publish my photo since it has a deeper meaning to me.
This composition has a same spirit, than a famous Italian painting The Birth of Venus (Nascita di Venere) by Botticelli, made in mid 1480.
When we are looking the remains of the supernova, we are looking the birthplace of building blocks we are made of. All the heavier elements than hydrogen and helium are formed in supernova explosion, like iron, oxygen and carbon. That's the real birth place of Venus!
The Birth of Venus
Click for a large image
Image is in mapped colors, Simeis 147 supernova remnant at top, IC 410 and iC 405 at bottom left.
Note, only central part of the painting is shown here. The whole painting of Botticelli can be seen here, https://en.wikipedia.org/wiki/The_Birth_of_Venus
The whole painting
Source, Wikipedia, https://en.wikipedia.org/wiki/The_Birth_of_Venus
Technical details for upper and lower mosaic panel.
Panel 1, Simeis 147, technical details
https://astroanarchy.blogspot.com/2020/02/simeis-147-sh2-240-large-supernova.html
https://astroanarchy.blogspot.com/2020/03/new-photo-deep-in-to-darkness.html
Thursday, March 5, 2020
New photo "Deep In To Darkness"
We are soon running out of darkness up here 65 North. I had a one good night between Tuesday and Wednesday and I got five hours data collected for IC 410 and IC 405.
f2.8 300mm camera lens, Tokina AT-x, combined with a large 9 micron pixels in Apogee Alta U16 astro camera gives me spatial resolution of 6 arcseconds/pixel. It's little undersampled but works extremely well for my purposes to capture very dim nebula structures.
Deep In To Darkness, IC 405, IC 410 and companions
Click for a full resolution image, It's worth it!
H-alpha channel alone, labeled
A closeup
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
Total exposure time
H-alpha, 9 x 1200 s, binned 1x1 = 3 h
O-III, 3 x 1200 s, binned 2x2 = 1 h
S-II, 3 x 1200 s. binned 2x2 = 1 h
O-III, 3 x 1200 s, binned 2x2 = 1 h
S-II, 3 x 1200 s. binned 2x2 = 1 h
Tuesday, March 3, 2020
"Two ways to die", an alternative composition
One of the dimmest targets I have ever shot. The supernova remnant Simeis 147 is large and dim but this nebula pair in Auriga is much dimmer. There are very few images about this target around. Photo is taken with Tokina AT-x 300mm f2.8 camera lens and Apogee Alta U16 astro camera.
This is an alternative vertical composition, the horizontal composition can be seen here, https://astroanarchy.blogspot.com/2020/03/two-ways-to-die-sh2-216-sh2-221.html
I think this vertica version is little more dynamic as a composition.
Supernova remnant and a planetary nebula in the same field of view
Click for a large photo
Photo is in mapped colors from the emission of ionized elements, R=Sulfur, G=Hydrogen and B=Oxygen. Image spans vertically about six degrees, (That's equal to 12 full Moons side by side in the sky.) The planetary Nebula Sharpless 216 at top and the supernova remnant Sharpless 221 lays at bottom.
H-alpha, 36 x 1200 s, binned 1x1 = 12 h
O-III, 33 x 1200 s, binned 2x2 = 11 h
S-II, 9 x 1200 s. binned 2x2 = 3 h
INFO
Sh2-216, the closest planetary nebula to earth ever discovered.
Image spans about six degrees horizontally, at left lays the large and very dim planetary nebula Sharpless 216 (aka Simeis 288, Marsalkova 44, LBN 742, GN 04.41.3)
This planetary nebula is the closest known planetary nebula to Earth, about 390 light years, and also one of the oldest known. Due the old age, it's very diffused, dim and large, apparent diameter is about 1,6 degrees. (Full Moon is about 0,5 degrees wide)
Supernova remnant Sh2-221
At right side of the photo lays a dim nad diffused supernova remnant Sh2-221 (SNR G160.4+02.8, HB9) it locates in constellation Auriga, about one degree West from star Capella. (Doesn't show in my image) The distance from the Earth, 2600 light years, is determined recently at 2007. This object was recognized as a supernova remnant back at seventies.
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 26h
H-alpha, 36 x 1200 s, binned 1x1 = 12 h
O-III, 33 x 1200 s, binned 2x2 = 11 h
S-II, 9 x 1200 s. binned 2x2 = 3 h
Subscribe to:
Posts (Atom)
