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ASTRO: 29 hours of High QE imaging of M27
I began this over the July 4th holiday and took my most recent data last
night, Aug 3 This is 12 hours of [SII], 10 hours of [OIII] and 7 hours of Halpha It was shot using the TK1024 powered FLI Dream Machine camera (1kx1k @24x24 micron pixels at about 85% QE) using 4.5nm Cust Sci emission line filters on the Stinger 450 classical cassegrain using a Lumicon Giant Easy Guider with focal reducer for a focal length of 3366mm (~f/7.1). You just can't beat those TK1024 chips and other such similar chips for going really deep. The combination of the high QE, the deep wells and the big pixels, it really makes for a fast camera that is just wonderful for deep emission line imaging with tight filters. I am intrigued by the sulfur channel data (red in this palette). I am seeing detail I've not seen previously in shallower exposures. I may take some more exposures, but am getting a bit tired of this object after shooting it for the past month. http://www.narrowbandimaging.com/m27...2hao3_page.htm |
#2
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ASTRO: 29 hours of High QE imaging of M27
Richard Crisp wrote: I began this over the July 4th holiday and took my most recent data last night, Aug 3 This is 12 hours of [SII], 10 hours of [OIII] and 7 hours of Halpha It was shot using the TK1024 powered FLI Dream Machine camera (1kx1k @24x24 micron pixels at about 85% QE) using 4.5nm Cust Sci emission line filters on the Stinger 450 classical cassegrain using a Lumicon Giant Easy Guider with focal reducer for a focal length of 3366mm (~f/7.1). You just can't beat those TK1024 chips and other such similar chips for going really deep. The combination of the high QE, the deep wells and the big pixels, it really makes for a fast camera that is just wonderful for deep emission line imaging with tight filters. I am intrigued by the sulfur channel data (red in this palette). I am seeing detail I've not seen previously in shallower exposures. I may take some more exposures, but am getting a bit tired of this object after shooting it for the past month. http://www.narrowbandimaging.com/m27...2hao3_page.htm Looks like most of the outer shell is oxygen with a bit of helium and not much sulfur. Interesting how it is somewhat segregated into areas like that. You have had a lot more good nights than I have! I get an hour here and there of sort of clear with horrid seeing. Not a summer for imaging so far anyway. Rick -- Correct domain name is arvig and it is net not com. Prefix is correct. Third character is a zero rather than a capital "Oh". |
#3
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ASTRO: 29 hours of High QE imaging of M27
No helium filter used for this image Rick
Sulfur, Hydrogen and Oxygen it has been very difficult to get any nights the past month. Maybe two or three hours on a good night, perhaps a single 20 minute on a not so good night. it takes a long time on the wallclock to log nearly 30 hour of exposure this time of year the really perverse thing is that the seeing has been excellent over the top of the fog but the fog is between me and the skies.... "Rick Johnson" wrote in message ... Richard Crisp wrote: I began this over the July 4th holiday and took my most recent data last night, Aug 3 This is 12 hours of [SII], 10 hours of [OIII] and 7 hours of Halpha It was shot using the TK1024 powered FLI Dream Machine camera (1kx1k @24x24 micron pixels at about 85% QE) using 4.5nm Cust Sci emission line filters on the Stinger 450 classical cassegrain using a Lumicon Giant Easy Guider with focal reducer for a focal length of 3366mm (~f/7.1). You just can't beat those TK1024 chips and other such similar chips for going really deep. The combination of the high QE, the deep wells and the big pixels, it really makes for a fast camera that is just wonderful for deep emission line imaging with tight filters. I am intrigued by the sulfur channel data (red in this palette). I am seeing detail I've not seen previously in shallower exposures. I may take some more exposures, but am getting a bit tired of this object after shooting it for the past month. http://www.narrowbandimaging.com/m27...2hao3_page.htm Looks like most of the outer shell is oxygen with a bit of helium and not much sulfur. Interesting how it is somewhat segregated into areas like that. You have had a lot more good nights than I have! I get an hour here and there of sort of clear with horrid seeing. Not a summer for imaging so far anyway. Rick -- Correct domain name is arvig and it is net not com. Prefix is correct. Third character is a zero rather than a capital "Oh". |
#4
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ASTRO: 29 hours of High QE imaging of M27
I meant hydrogen, I was talking to someone while typing. I can't do two
things at once any more. No fog here so far but it is forecast for tomorrow. I get my best seeing with hazy skies, ever with clear ones. Rick Richard Crisp wrote: No helium filter used for this image Rick Sulfur, Hydrogen and Oxygen it has been very difficult to get any nights the past month. Maybe two or three hours on a good night, perhaps a single 20 minute on a not so good night. it takes a long time on the wallclock to log nearly 30 hour of exposure this time of year the really perverse thing is that the seeing has been excellent over the top of the fog but the fog is between me and the skies.... "Rick Johnson" wrote in message ... Richard Crisp wrote: I began this over the July 4th holiday and took my most recent data last night, Aug 3 This is 12 hours of [SII], 10 hours of [OIII] and 7 hours of Halpha It was shot using the TK1024 powered FLI Dream Machine camera (1kx1k @24x24 micron pixels at about 85% QE) using 4.5nm Cust Sci emission line filters on the Stinger 450 classical cassegrain using a Lumicon Giant Easy Guider with focal reducer for a focal length of 3366mm (~f/7.1). You just can't beat those TK1024 chips and other such similar chips for going really deep. The combination of the high QE, the deep wells and the big pixels, it really makes for a fast camera that is just wonderful for deep emission line imaging with tight filters. I am intrigued by the sulfur channel data (red in this palette). I am seeing detail I've not seen previously in shallower exposures. I may take some more exposures, but am getting a bit tired of this object after shooting it for the past month. http://www.narrowbandimaging.com/m27...2hao3_page.htm Looks like most of the outer shell is oxygen with a bit of helium and not much sulfur. Interesting how it is somewhat segregated into areas like that. You have had a lot more good nights than I have! I get an hour here and there of sort of clear with horrid seeing. Not a summer for imaging so far anyway. Rick -- Correct domain name is arvig and it is net not com. Prefix is correct. Third character is a zero rather than a capital "Oh". |
#5
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ASTRO: 29 hours of High QE imaging of M27
Great image Richard.
The long exposure time certainly paid off. As you mention the sulfur channel, do you have that channel as a separate image somewhere? I know how M27 looks in Halpha and OIII, but I don't have a clue about SII. Stefan "Richard Crisp" schrieb im Newsbeitrag ... I began this over the July 4th holiday and took my most recent data last night, Aug 3 This is 12 hours of [SII], 10 hours of [OIII] and 7 hours of Halpha It was shot using the TK1024 powered FLI Dream Machine camera (1kx1k @24x24 micron pixels at about 85% QE) using 4.5nm Cust Sci emission line filters on the Stinger 450 classical cassegrain using a Lumicon Giant Easy Guider with focal reducer for a focal length of 3366mm (~f/7.1). You just can't beat those TK1024 chips and other such similar chips for going really deep. The combination of the high QE, the deep wells and the big pixels, it really makes for a fast camera that is just wonderful for deep emission line imaging with tight filters. I am intrigued by the sulfur channel data (red in this palette). I am seeing detail I've not seen previously in shallower exposures. I may take some more exposures, but am getting a bit tired of this object after shooting it for the past month. http://www.narrowbandimaging.com/m27...2hao3_page.htm |
#6
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ASTRO: 29 hours of High QE imaging of M27
"Stefan Lilge" wrote in message ... Great image Richard. The long exposure time certainly paid off. As you mention the sulfur channel, do you have that channel as a separate image somewhere? I know how M27 looks in Halpha and OIII, but I don't have a clue about SII. Actually I would love to see all 3 separate to see how it composes. Anyway Great work Richard Kev |
#7
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ASTRO: 29 hours of High QE imaging of M27
Kev wrote: "Stefan Lilge" wrote in message ... Great image Richard. The long exposure time certainly paid off. As you mention the sulfur channel, do you have that channel as a separate image somewhere? I know how M27 looks in Halpha and OIII, but I don't have a clue about SII. Actually I would love to see all 3 separate to see how it composes. Anyway Great work Richard Kev If you have Photoshop or another image processing program that allows you to see the RGB color planes of a color image then you already have the separate images. Richard doesn't make a synthetic Luminosity image so the data you want is there in his photos. The red plane is Sulfur, the green hydrogen and blue oxygen in this photo. He used a different palette for the Veil shot he posted. I've been told the free GIMP will do this. I don't have it so can't verify that. Rick -- Correct domain name is arvig and it is net not com. Prefix is correct. Third character is a zero rather than a capital "Oh". |
#8
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ASTRO: 29 hours of High QE imaging of M27
Thanks for the hint Rick. I did a "copy and paste" to AstroArt and split it
into RGB there. The SII is really cool, quite different to Ha and OIII. Stefan "Rick Johnson" schrieb im Newsbeitrag ... Kev wrote: "Stefan Lilge" wrote in message ... Great image Richard. The long exposure time certainly paid off. As you mention the sulfur channel, do you have that channel as a separate image somewhere? I know how M27 looks in Halpha and OIII, but I don't have a clue about SII. Actually I would love to see all 3 separate to see how it composes. Anyway Great work Richard Kev If you have Photoshop or another image processing program that allows you to see the RGB color planes of a color image then you already have the separate images. Richard doesn't make a synthetic Luminosity image so the data you want is there in his photos. The red plane is Sulfur, the green hydrogen and blue oxygen in this photo. He used a different palette for the Veil shot he posted. I've been told the free GIMP will do this. I don't have it so can't verify that. Rick -- Correct domain name is arvig and it is net not com. Prefix is correct. Third character is a zero rather than a capital "Oh". |
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