Monday, May 24, 2010
M20, the "Triffid nebula", Continues
Less compressed version, please, have a look in my Portfolio:
http://astroanarchy.zenfolio.com/p5990174/h388dbd45#h388dbd45
M20, imaged with a Northern Galactic members remote telescope in Australia,
Impressive instrumentation and great location in Souther Australia under a dark Sky, makes possible to go deep in very short time! Image above has only 70min. total exposure time, Luminance is 25 min.
I'll shoot more lights for this later.
Technical details
16" RCOS ja Apogee U9000 camera.
LRGB combo.
LRGB-image, Luminance=5x300s Red=3x300s, Green=3x300s and Blue=3x300s . Dark and Flat calibrated.
Raw data is shared with Petri Kehusmaa and J-P Metsavainio
Processing workflow:
Image acquisition, MaxiDL v4.xxx
Stacked and calibrated in CCDStack.
Deconvolution with a CCDSharp, 30 iterations.
Deconvolution with a CCDSharp, 30 iterations.
Levels, curves and color combine in PS CS3.
Sunday, May 23, 2010
M16, the "eagle nebula" in HST-palette
M16, HST-palette, RGB-stars
Cropped detail from image n HST-palette and with a broad band RGB-stars.
I don't usually like to mix images, made with totally different technique. How ever, it's very common among many astro photographers to mix broad band stars to a narrow band image.
The reason is, there is no real stars colors in NB imaging and generally stars are heavily suppressed due the very narrow band width used in filters.
Some times it's a good thing to have little suppressed stars to be able to show the Nebulous better.
imaged with a Northern Galactic members remote telescope in Australia, https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhT5xcPgdl42zGREyCwydFYagJMAi08LFbJBf0G3CN2kmyirDNtFbaj3xJ_bmA93X2t1nxBQX4uTWobfRYnYLT3TiqNZVZMbdW7hVlAVGWRYnTRndCGV9zhHmxvyEAHSz3sVHzVefaXEFg/s1600/NGTelescopeL.jpg
16" RCOS ja Apogee U9000 camera.
LRGB combo.
H-alpha 5x1200s, O-III 2x1200s, S-II 2x1200s . Dark and Flat calibrated.
Raw data is shared with Petri Kehusmaa and J-P Metsavainio
Processing workflow:
Image acquisition, MaxiDL v4.xxx
Stacked and calibrated in CCDStack.
Deconvolution with a CCDSharp, 30 iterations.
Deconvolution with a CCDSharp, 30 iterations.
Levels, curves and color combine in PS CS3.
Narrow band lines are mixed to a HST-palette (Used generally with Hubble Space Telescope)
Red=S-II, Green=H-alpha and Blue=O-III
EDIT. 25.05. 2010
All the pure HST-palette NB images are now updated. Stars are redone by using information from all the NB-channels. By this way, Stars are somehow large but overall feel is more natural, than by using stars from the H-alpha channel alone, as I have done before.
My "Tone mapping" procedure is used to make this image, a tutorial for it can be found here:
http://astroanarchy.blogspot.com/2009/04/neaic.html
Since stars doesn't have any relevant color information in HST-palette images, due the broad band nature of Star emission, I have developed a powerful method, Tone Mapping, to process NB images.
Now on I'll add a star information from all the channels, not just from H-a.
I will rewrite the "Tome Mapping" document in near future.
All NB Channels
Channels are "Tonemapped", all the high S/N components = Stars, are removed to build a well balanced color Map.
All the pure HST-palette NB images are now updated. Stars are redone by using information from all the NB-channels. By this way, Stars are somehow large but overall feel is more natural, than by using stars from the H-alpha channel alone, as I have done before.
My "Tone mapping" procedure is used to make this image, a tutorial for it can be found here:
http://astroanarchy.blogspot.com/2009/04/neaic.html
Since stars doesn't have any relevant color information in HST-palette images, due the broad band nature of Star emission, I have developed a powerful method, Tone Mapping, to process NB images.
Now on I'll add a star information from all the channels, not just from H-a.
I will rewrite the "Tome Mapping" document in near future.
All NB Channels
Channels are "Tonemapped", all the high S/N components = Stars, are removed to build a well balanced color Map.
A Starless "Color Map", build from channels above.
Thursday, May 20, 2010
M 83, the "Southern Pinwheel"
M 83, in constellation Hydra, imaged with a Northern Galactic members remote telescope in Australia, https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhT5xcPgdl42zGREyCwydFYagJMAi08LFbJBf0G3CN2kmyirDNtFbaj3xJ_bmA93X2t1nxBQX4uTWobfRYnYLT3TiqNZVZMbdW7hVlAVGWRYnTRndCGV9zhHmxvyEAHSz3sVHzVefaXEFg/s1600/NGTelescopeL.jpg
16" RCOS ja Apogee U9000 camera.
LRGB combo.
Luminance 6x300s, Red 4x300s, Green 3x300s and Blue 3x300s. Dark calibrated, no flats.
Raw data is shared with Petri Kehusmaa and J-P Metsavainio
Processing workflow:
Image acquisition, MaxiDL v4.xxx
Stacked and calibrated in CCDStack.
Deconvolution with a CCDSharp, 30 iterations.
Deconvolution with a CCDSharp, 30 iterations.
Levels, curves and color combine in PS CS3.
Wednesday, May 19, 2010
M16, the "Eagle nebula"
Images are in natural broadband colors, boosted with H-alpha and an O-III.
Northern Galactic members remote telescope, https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhT5xcPgdl42zGREyCwydFYagJMAi08LFbJBf0G3CN2kmyirDNtFbaj3xJ_bmA93X2t1nxBQX4uTWobfRYnYLT3TiqNZVZMbdW7hVlAVGWRYnTRndCGV9zhHmxvyEAHSz3sVHzVefaXEFg/s1600/NGTelescopeL.jpg
provides great views to a Southern skies in Australia.
Technical details:
16" RCOS ja Apogee U9000 camera. HA:O-III
and LRGB combo.
H-a 5x1200s, O-III 1x1200s, and 15x300s, Red 2x300s,
Green 2x300s and Blue 2x300s. Dark calibrated, no flats.
Processing workflow:
Image acquisition, MaxiDL v4.xxx
Stacked and calibrated in CCDStack.
Deconvolution with a CCDSharp, 30 iterations.
Deconvolution with a CCDSharp, 30 iterations.
Levels, curves and color combine in PS CS3.
In this version, only RGB and the Luminance data is used, no H-alpha nor O-III.
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