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Sunday, February 23, 2020

Cederblad 214, the Cosmic Question mark in visual colors

I have published this target in mapped colors at 9.2. 2020, it can be seen here, https://astroanarchy.blogspot.com/2020/02/new-photo-of-cederblad-214-cosmic.html

This photo was taken with my "new" imaging system. I managed to mate an old Tokina AT-x 300mm f2.8 camera optics with the Apogee Alta U16 astro camera and filter wheel. Some angle grinder was needed to have enough back focus... More info here, https://astroanarchy.blogspot.com/2020/01/the-frankenstein-monster-my-current.html

This photo of Cosmic Question Mark has a great symbolic value for me. The cosmic curiosity is the very reason I'm doing this difficult, and sometimes frustrating, form of nature photographing. 


Cederblad 214 and Sharpless 170,  ? "
Please, click for a full size image

Photo is in natural colors combined from narrowband channels. An ionized hydrogen, H-alpha, is emitting deep red light and it's dominating the color scheme. Bluish hues are from an ionized oxygen, O-III.


A two panel mosaic panorama to SNR CTB1
Please, click for a full size image

This composition in mapped colors can be seen here, https://astroanarchy.blogspot.com/2020/02/panorama-mosaic-cederblad-214-sharpless.html


INFO


This cosmic question mark, in constellation Cepheus, contains following objects; At top, Cederblad 214(Ced 214) surrounded by NGC 7822, a dot like nebula at the bottom is known as Sharpless 170,(Sh2-170). Image spans over Five degrees vertically. Distance from my observatory, is ~2750 light years and it spans about 40 light years.


Orientation in the sky


Cederblad 214 can  be seen at upper left corner. Image shows its location related to constellation Cepheus.


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, 12 x 1200 s, binned 1x1 = 4 h
O-III, 1x 1200 s, binned 2x2 = 20 min.
S-II, 1 x 1200 s. binned 2x2 = 20 min.





Saturday, February 22, 2020

Simeis 147 (Sh2-240), a large supernova remnant in visual colors


Simeis 147 is a difficult target due to a low surface brightness and a very large angular diameter.
Yesterday I 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. There are some very dim bluish hues from a light of an ionized oxygen, O-III.
I collected the data for this image between 27.12.2019 and 19.02.2020.


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!
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.


INFO

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.

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)

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, 24x 600 s, binned 2x2 = 4 h
S-II, 1 x 12 x 600 s. binned 2x2 = 2 h

Friday, February 21, 2020

Simeis 147 (Sh2-240), a large supernova remnant in Taurus

Simeis 147 is a difficult target due to a low surface brightness and a very large angular diameter.
I collected the data for this image between 27.12.2019 and 19.02.2020.

Simeis 147 (Sharpless 240)
Click for a large image

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 mapped colors, from the emission of ionized elements, R=Sulphur, G=Hydrogen and B=Oxygen. 

INFO


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.
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)


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, 24x 600 s, binned 2x2 = 4 h
S-II, 1 x 12 x 600 s. binned 2x2 = 2 h




Sunday, February 16, 2020

Panorama mosaic, Cederblad 214, Sharpless 170 and supernova remnant CTB1

I published the Cosmic Question Mark, Cederblad 214 and Sharpless 170 at February 9,
his morning I published the photo of supernova remnant CTB1 (Abell 85). Photos are overlapping, so I was able to build a mosaic image out of them. image spans about ten degrees of sky vertically, that's as large as twenty full Moons side by side.! (The CTB1 at lower center has a same angular diameter as our Moon.)  Photo is taken with the Tokina AT-x 300mm f2.8 camera lens, Apogee Alta U16 astro camera and Astrodon narrowband filters. Info about my current setup here, https://astroanarchy.blogspot.com/2020/01/the-frankenstein-monster-my-current.html


A two frame mosaic panorama from constellation Cassiopeia
Click for a large image, it's worth it!

mage is in mapped colours, from the emission of ionized elements, R=Sulphur, G=Hydrogen and B=Oxygen.

Upper part of the mosaic image
Click for a large image


Image details here, https://astroanarchy.blogspot.com/2020/02/new-photo-of-cederblad-214-cosmic.html


Lower part of the mosaic image Click for a large image


Image details here, https://astroanarchy.blogspot.com/2020/02/ctb1-supernova-remnant-in-cassiopeia.html




Technical details
Click for a large image

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 for both panels
H-alpha, 21 x 1200 s, binned 1x1 = 7 h
O-III, 2x 1200 s, binned 2x2 = 40 min.
S-II, 2 x 1200 s. binned 2x2 = 40 min.


An older longer focal length image of CTB1 from 2016
Please, click for a large image

More info about this photo here, https://astroanarchy.blogspot.com/2016/01/abell-85-ctb1-dim-galactic-supernova.html


An older longer focal length image of Cederblad 214 from 2016
Please, click for a large image

A detail shot from the bright central region of the image at the top.  This photo was taken with my new setup, Celestron Edge HD 1100 f7, Apogee Alta U16 astro camera and the Astrodon narrowband filters, Spring 2014. The original blog post from 2012, with technical details, can be seen HERE

CTB1, a supernova remnant in Cassiopeia

This has been a very cloudy imaging season up here 65N. Last Friday we had about five hours for clear weather before the clouds rolled in. I managed to get just enough exposures for this dim supernova remnant in Cassiopeia. I have shot this target before with much longer focal length instrument. It's nice to see CTB1 in large context when imaging with Tokina AT-x 300mm f2.8 camera lens. 


CTB1 (Abell 85)
Please, click for a large image, it's worth it.

Image is in mapped colours, from the emission of ionized elements, R=Sulphur, G=Hydrogen and B=Oxygen. 


A closer look
Please, click for a large image




An older longer focal length image back from 2016
Please, click for a large image

More info about this photo here, https://astroanarchy.blogspot.com/2016/01/abell-85-ctb1-dim-galactic-supernova.html




INFO

Abell 85 is a very faint supernova remnant in constellation Cassiopeia. It's difficult to image with any details due to extremely low surface brightness. Abell 85 has a largish diameter, about half a degree, it has a same apparent diameter as a full Moon. The physical diameter is about 98 light years across. This SNR locates about 9800 light years from the Earth. CTB1 was originally thought to be a planetary nebula and it was included the Abell catalog of planetary nebulae under a name Abell 85. It was confirmed to be a supernova remnant by Willis & Dickel at 1971.



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, 1x 1200 s, binned 2x2 = 20 min.
S-II, 1 x 1200 s. binned 2x2 = 20 min.


A single calibrated and stretched 20 min. H-alpha frame as it comes from the camera (Downscaled)



Friday, February 14, 2020

Monday, February 10, 2020

Cederblad 214, the Cosmic Question mark, in visual colors

This photo was taken with my "new" imaging system. I managed to mate an old Tokina AT-x 300mm f2.8 camera optics with the Apogee Alta U16 astro camera and filter wheel. Some angle grinder was needed to have enough back focus... More info here, https://astroanarchy.blogspot.com/2020/01/the-frankenstein-monster-my-current.html

This photo of Cosmic Question Mark has a great symbolic value for me. The cosmic curiosity is the very reason I'm doing this difficult, and sometimes frustrating, form of nature photographing. 

? "
Cederblad 214 and Sharpless 170,  
Please, click for a full size image

Visual palette combined from emissions of ionized elements. Red = hydrogen + 33% sulfur, Green = oxygen and Blue = oxygen + 20% hydrogen to compensate missing h-beta emission.

INFO

This cosmic question mark, in constellation Cepheus, contains following objects; At top, Cederblad 214(Ced 214) surrounded by NGC 7822, a dot like nebula at the bottom is known as Sharpless 170,(Sh2-170). Image spans over Five degrees vertically. Distance from my observatory, is ~2750 light years and it spans about 40 light years.


Orientation in the sky

Cederblad 214 can  be seen at upper left corner. Image shows its location related to constellation Cepheus.


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, 12 x 1200 s, binned 1x1 = 4 h
O-III, 1x 1200 s, binned 2x2 = 20 min.
S-II, 1 x 1200 s. binned 2x2 = 20 min.




Sunday, February 9, 2020

New photo of Cederblad 214, the Cosmic Question mark

So far this has been the most cloudy winter up here for twenty years. I'm trying to use every single clear moment to have something to publish. beside the weather problems, the light pollution is increasing every moment due to LED-lightning. We have now more light pollution than ever and it's Broadband, multi spectral light. Old high pressure sodium and mercury lights are easy to filter out since the light from them is yellowish narrowband emission. LED light is impossible to filter out, it's like a Sunlight, very broad band from IR to UV and everything between. Imaging is getting more difficult and soon it'll be impossible from my current location.

This photo was taken with my "new" imaging system. I managed to mate an old Tokina AT-x 300mm f2.8 camera optics with the Apogee Alta U16 astro camera and filter wheel. Some angle grinder was needed to have enough back focus... More info here, https://astroanarchy.blogspot.com/2020/01/the-frankenstein-monster-my-current.html

This new photo of Cosmic Question Mark has a great symbolic value for me. The cosmic curiosity is the very reason I'm doing this difficult, and sometimes frustrating, form of nature photographing. 


Cederblad 214 and Sharpless 170,  ? "
Please, click for a full size image

Image is in mapped colours, from the emission of ionized elements, R=Sulphur, G=Hydrogen and B=Oxygen. 


Closeup from the center (An older, long focal length image)
Please, click for a full size image



A detail shot from the bright central region of the image at the top.  This photo was taken with my new setup, Celestron Edge HD 1100 f7, Apogee Alta U16 astro camera and the Astrodon narrowband filters, Spring 2014. The original blog post from 2012, with technical details, can be seen HERE


INFO


This cosmic question mark, in constellation Cepheus, contains following objects; At top, Cederblad 214(Ced 214) surrounded by NGC 7822, a dot like nebula at the bottom is known as Sharpless 170,(Sh2-170). Image spans over Five degrees vertically. Distance from my observatory, is ~2750 light years and it spans about 40 light years.


Orientation in the sky


Cederblad 214 can  be seen at upper left corner. Image shows its location related to constellation Cepheus.


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, 12 x 1200 s, binned 1x1 = 4 h
O-III, 1x 1200 s, binned 2x2 = 20 min.
S-II, 1 x 1200 s. binned 2x2 = 20 min.







Tuesday, February 4, 2020

Astro Anarchy gets published!



AAPOD2

My photo of IC 1396, the Elephant's Trunk Nebula get selected as an Amateur Astronomy Image of the Day, -AAPOD2

Please, click for a large image

Image info and technical details can be seen HERE





Tuesday, January 28, 2020

IC 1396 wide field, reprocessed

I reproceed the material for IC 1396 since I noticed a small flaw in the calibration file used.
This was my first light image for my "new" imaging system and first light for the whole winter season 2019 -2020.

Image is now "deeper" and stars are much better resolved. I'm really happy, how well this old second hand Tokina AT-x 300mm f2.8 lens performs. Even the CCD-shell in Apogee Alta U16 camera is very large, over 36x36mm, image from the lens can cover the whole CCD. There are some coma at out most corners of the full frame image but nothing serious.

The imaging system is undersampled, it has a spatial resolution of 6 arc seconds / pixel. This makes the optical system very fast. The same Tokina lens with a small pixel CCD and spatial resolution of 1 arc second / pixel, is 36 times slower to capture light. That's a lot! One hour exposure with my current system is equal to 36 hours exposure with one that has tiny pixels.The lost of resolution is not really an issue, when I want to capture very faint and diffused nebula structures.

Info about my current imaging system can be seen here, https://astroanarchy.blogspot.com/2020/01/the-frankenstein-monster-my-current.html


IC 1396
Please, click for a full size photo it's worth it!

Image is in mapped colours, from the emission of ionized elements, R=Sulphur, G=Hydrogen and B=Oxygen. The signal for ionized oxygen. Note, at lower right corner shows a small part of Sharpless 129, Sh2-129. Some images of Sharpless 129 can be seen here, https://astroanarchy.blogspot.com/2018/11/a-giant-squid-ou4-imaging-project.html



An experimental starless version
Please, click for a full size photo

The planetary nebula candidate at middle left stands out well in this starless photo of IC 1396 area.



Planetary Nebula?
Please, click for a full size photo

Just left from the IC 1396 seems to be a circular formation with some weak O-III emission. Could this be a planetary nebula? My friend, Sabik Rasool, a planetary nebula enthusiast, Find out that this formation is a HII area discovered in 2015. This doesn't rule out, that this could be an ancient planetary nebula?

A close up and some info
Please, click for a full size photo


IC 1396 spans hundreds of light years at distance of about 3000 light years in constellation Cepheus. The famous formation of glowing gases, the "Elephant's Trunk Nebula" can be seen at four o'clock position.
This is an active star formation region and it has several massive young stars inside it, coursing the ionization of elements of this emission nebula.

The Garnet Star and the suspected planetary nebula PM 1-333. When I published the first version of this image in Facebook, an other friend of mine, Jussi Kantola, pointed out, that near the Garnet Star lays the PM 1-333. More info about this interesting region can be seen here,  https://massimo-cosmicjourney.blogspot.com/2009/09/garnet-star-and-suspected-planetary.html?fbclid=IwAR2dmttg1Q2NmualjjwEPYI1wY8jlUJLClbcHwXkk9xnm7Tvi0YFcaHVwT4


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, 12 x 600 s, binned 1x1 = 2 h
O-III, 6x 600 s, binned 2x2 = 1 h.
S-II, 3 x 600 s. binned 2x2 = 0,5 h


Sunday, January 26, 2020

Deep in to my heart, IC 1805 in mapped colors

I have published this image in visual colors at January 14. Since then, I have shot the emission of sulfur, S-II, and now I'm able to publish a version in mapped colors.
HST-palette separates emission areas nicely and it's visually pleasing. In visual palette emission from sulfur and hydrogen are both at red part of the spectrum. Emission from oxygen is greenish blue.

I made some testing with my new imaging system based on Tokina AT-x 300mm f2.8 camera lens.
The CCD I'm using has kind of large pixels, 9 microns, so I'm undersampled, the image scale is just over 6 arcseconds / pixel. Undersampling is not a bad thing when my targets are large and dim nebula complexes. This system collects photons very fast!

I selected the Heart Nebula as a target since I have plenty of reference material for it. Another reason is interesting and rarely imaged area after the bright tip of the heart. There are some remnants of a supernova explosion. I was really thrilled, when I saw the final stack of 12 600s H-alpha light frames. (Equal to 2h of exposures) I never have seen so much background nebulae and details from this popular target.


The Heart Nebula, IC 1805
Please, click for a large image

C 1805 in mapped colors, from the emission of ionized elements,
R=Sulfur, G=Hydrogen and B=Oxygen. (Hubble Palette)



SUPERNOVA REMNANT 132.7+1.3 (HB3)
IC 1805 in visual palette
Please, click for a large image

Red emission of an ionized hydrogen (H-alpha) is dominating the scene. Image is in visual color palette from emission of an ionized hydrogen and oxygen. R=hydrogen, G=Oxygen and B=oxygen. 
SNR
In this photo there is a large supernova remnant, marked as a white circle. I haven't seen any photos of it before. I must take more O-III exposures to see, if I'm able to pick up any signal from this supernova remnant. 

Radio image of the area shows mostly signal from OB6


SNR 132.7+1.3 at upper right. Source and more information, http://galaxymap.org/drupal/node/103




IC 1805 H-alpha emission alone
Please, click for a large image

H-alpha emission, only two hours of exposures is enough for a very deep image. The combination of 300mm f2.8 camera optics and large 9 micron pixels makes this imaging system extremely hungry for photons. Image scale is just over 6 arcseconds / pixel. By using the drizzle stacking method with well dithered subframes I can avoid any square stars. 


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 300mm 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, 12 x 600 s, binned 1x1 = 2 h
O-III, 3x 600 s, binned 1x1 = 30 min..
S-II, 2x1200 s, binned 2x2 = 40 min.


Saturday, January 25, 2020

A deep view to the California Nebula in mapped colors

I have been shooting few nights with my "new" wide field instrument. Undersampling is a great thing if you want to capture very dim and diffused gas structures with a minimal exposure time. The Tokina AT-x 300mm f2.8 optics combined to CCD with 9 micron pixels (Apogee Alta U16 4096x4096 9 micron pixels) gives me a spatial resolution of 6 arcseconds/pixel. The problem with one pixel stars is actually not a problem. I'm using dither when imaging and when lights are stacked, it delivers
beautifully rounded stars.

The very same optics with a camera, that has a very small pixels, will give a resolution of around one arcsecond / pixel. With same optical configuration, 300mm f2.8, system that has spatial resolution of 1 arcsecond / pixel is 36 times slover, than same optics with large pixels and spatial resolution of 6 arcseconds / pixel.


California Nebula, a deep view to the NGC 1499
Please, click for a full size image

Image is in mapped colors,  H-alpha = Green, S-II = red and O-III = Blue. 
This is a very deep image, I haven't seen those extended shapes at upper right and  around the brighter nebula before. I have published the same image in visual color palette, it can be seen here, https://astroanarchy.blogspot.com/2020/01/deep-view-to-california-nebula-ngc-1499.html


A closeup
Please, click for a full size image

A very good resolution for the 300mm camera lens



An experimental starless version
Please, click for a full size image

Various shapes in nebula are easier to see when stars are removed.


INFO

The California Nebula is an emission area located in constellation Perseus. It appears to resemble outlines of State of California on long exposure photographs, like this one. It has a very low surface brightness and it's very difficult to observe visually. Distance from my hometown Oulu, Finland, is about 1000 light years.

this image spans around five degrees horizontally. The Wikipedia article states, that the angular size is about 2,5 degrees (Five full Moons side by side) but as can be seen in this image, the actual size, with a dim outer parts, is much large.



H-alpha exposure alone
Please, click for a full size image

H-alpha image contains seven 20 min sub exposures stacked together. Exposure time is 2h 20 min..



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 300mm f2.8 camera lens

Mount
10-micron 1000

Cameras, filters and guiding
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, 7 x 1200 s, binned 1x1 = 2 h 20 min.
O-III, 2x 1200 s, binned 2x2 = 40 min.
S-II, 2x1200 s binned 2x2 = 40 min.



The apparent scale in a sky
Please, click for a full size image

This is a large object
NOTE, the apparent size of the full moon is marked in all of the images above.
The angular dimension of the moon is 30 arcminutes, that's 0,5 degrees.




Thursday, January 23, 2020

A deep view to the California Nebula, NGC 1499

I have been shooting few nights with my "new" wide field instrument. Undersampling is a great thing if you want to capture very dim and diffused gas structures with a minimal exposure time. The Tokina AT-x 300mm f2.8 optics combined to CCD with 9 micron pixels (Apogee Alta U16 4096x4096 9 micron pixels) gives me a spatial resolution of 6 arcseconds/pixel. The problem with one pixel stars is actually not a problem. I'm using dither when imaging and when lights are stacked, it delivers
beautifully rounded stars..

California Nebula, NGC 1499
Please, click for a full size image

Image is in natural colors combined from the narrowband channels. H-alpha = Red, O-III = Green and O-III + 20% H-alpha = Blue. This is a very deep image, I haven't seen those extended shapes at upper right and  around the brighter nebula.


INFO

The California Nebula is an emission area located in constellation Perseus. It appears to resemble outlines of State of California on long exposure photographs, like this one. It has a very low surface brightness and it's very difficult to observe visually. Distance from my hometown Oulu, Finland, is about 1000 light years.
this image spans around five degrees horizontally. The Wikipedia article states, that the angular size is about 2,5 degrees (Five full Moons side by side) but as can be seen in this image, the actual size, with a dim outer parts, is much large.

H-alpha exposure alone
Please, click for a full size image

H-alpha  image contains seven 20 min sub exposures stacked together. Exposure time is 2h 20 min..






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 300mm f2.8 camera lens

Mount
10-micron 1000

Cameras, filters and guiding
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, 7 x 1200 s, binned 1x1 = 2 h 20 min.
O-III, 2x 1200 s, binned 2x2 = 40 min.



On older image of California nebula in mapped colors
The apparent scale in a sky
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This is a large object, note, the size of the Moon is marked, as a scale, in all of the images above.


Sunday, January 19, 2020

An animated Heart Nebula, IC1805 with and without stars

I have originally published this deep image of IC1805 at January 14 2020. This time I made a starless version of  the image. I'm usin the starless version of photo in my processing routine and sometimes they look kind of interesting. The actual nebula stands out very nicely without stars.

My "new" imaging system combines a Tokina AT-x 300mm f2.8 lens to a large CCD of Apogee Alta U16 astro camera with 4096x4096 9 micron pixels. This combination has a resolution of about 5 arc seconds/pixels. Undersampling imaging system is a great tool to bring out very dim and diffused nebulae very fast. This photo of Heart Nebula has only 2h of H-alpha light and just 30 min O-III light.

IC 1805 without stars
Please, click for a full size image

It's easier to see the actual nebula when stars are removed. Human brains has a tendency to form quasi logical shapes and forms from a random cloud of dots. Famous example of this phenomena is Percival Lowell and canals of Mars.


An animated image, IC 1805 with and without stars
Please, click for a full size 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 300mm 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, 12 x 600 s, binned 1x1 = 2 h
O-III, 3x 600 s, binned 1x1 = 30 min..




From Bubble to Cave Nebula in visual colors

At January 10. I shot few lights for this busy area in Cassiopeia from the Bubble Nebula to Cave nebula. The Tokina 300mm AT-x f2.8 camera lens combined to Apogee Alta U16 camera is a very good to capturing photons. The combination of fast f2.8 optics and 9 micron pixels, (4096 x 4096 pixels) goes very deep very fast. (First light photo here, https://astroanarchy.blogspot.com/2020/01/first-light-for-winter-season-2019-20.html)


From Bubble to Cave Nebula
Please, click for a large image!


Image is in visual palette combined from emissions of  ionized elements. Red=H-alpha + S-II, Green= O-III and Blue=O-III + 25%H-alpha to compensate missing H-beta emission.
Same data in mapped colors can be seen here, https://astroanarchy.blogspot.com/2020/01/second-light-for-my-wide-field-imaging.html


Orientation
Please, click for a large image!

The area of the new photo is marked as a white rectangle. Info about this image here, https://astroanarchy.blogspot.com/2014/01/a-grande-finale-of-cepheus-project.html


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, 18 x 600 s, binned 1x1 = 2,5 h
O-III, 6x 600 s, binned 1x1 = 1 h.
S-II, 2 x 600 s. binned 1x1 = 20 min.