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ASTRO: Eastern Veil with Atik 383
I spent four (short) nights for a total of 10 hours imaging time in the
first half of July on the eastern part of the cirrus nebula (NGC 6992/6995). The larger chip of my (rather) new Atik 383 camera allowed for a larger scale than previous attempts with my SXV-H9 camera. Nights were very warm, one of them well above 20 degrees celsius, so I could only cool the camera to -15 degrees that night. I didn't have darks for that temperature (only for -20 deg), so I had to scale the darks, but scaled them the wrong way (dividing the dark signal by 2 instead of multiplying with 2). That error didn't seem to have much effect on the final image as the 8300 chip has a rather low dark current (but still benefits from darks, unlike the SXV-H9, where using darks usually gives worse results than without darks). Taken from the middle of Berlin with a Skywatcher ED120 plus Skywatcher 0.85 reducer on a H-EQ5 Synscan mount. Atik 383 L+ camera with Baader Halpha and OIII filters, 17x20 minutes Ha and 14x20 minutes OIII, combined to a Ha:OIII:OIII. http://ccd-astronomy.de/temp4/6992coloursmallneugut.jpg Stefan |
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ASTRO: Eastern Veil with Atik 383
In article TxE7o.44217$MQ3.14477@hurricane, Stefan Lilge
wrote: I spent four (short) nights for a total of 10 hours imaging time in the first half of July on the eastern part of the cirrus nebula (NGC 6992/6995). The larger chip of my (rather) new Atik 383 camera allowed for a larger scale than previous attempts with my SXV-H9 camera. Nights were very warm, one of them well above 20 degrees celsius, so I could only cool the camera to -15 degrees that night. I didn't have darks for that temperature (only for -20 deg), so I had to scale the darks, but scaled them the wrong way (dividing the dark signal by 2 instead of multiplying with 2). That error didn't seem to have much effect on the final image as the 8300 chip has a rather low dark current (but still benefits from darks, unlike the SXV-H9, where using darks usually gives worse results than without darks). Taken from the middle of Berlin with a Skywatcher ED120 plus Skywatcher 0.85 reducer on a H-EQ5 Synscan mount. Atik 383 L+ camera with Baader Halpha and OIII filters, 17x20 minutes Ha and 14x20 minutes OIII, combined to a Ha:OIII:OIII. http://ccd-astronomy.de/temp4/6992coloursmallneugut.jpg Stefan begin 666 6992coloursmallneugut.jpg Very Nice image Stefan.. Milton Aupperle http://www.outcastsoft.com/AstroImages/AstroIndex.html |
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ASTRO: Eastern Veil with Atik 383
Hey I like that Stefan
that system is turning our very nice results The FLI ML8300 will cool 65C from ambient. A recent outing showed ambients of +33C and I had no trouble reaching -25C here are some photos and screen shots showing my experience http://www.narrowbandimaging.com/inc...ng_hot_day.pdf "Stefan Lilge" wrote in message news:TxE7o.44217$MQ3.14477@hurricane... I spent four (short) nights for a total of 10 hours imaging time in the first half of July on the eastern part of the cirrus nebula (NGC 6992/6995). The larger chip of my (rather) new Atik 383 camera allowed for a larger scale than previous attempts with my SXV-H9 camera. Nights were very warm, one of them well above 20 degrees celsius, so I could only cool the camera to -15 degrees that night. I didn't have darks for that temperature (only for -20 deg), so I had to scale the darks, but scaled them the wrong way (dividing the dark signal by 2 instead of multiplying with 2). That error didn't seem to have much effect on the final image as the 8300 chip has a rather low dark current (but still benefits from darks, unlike the SXV-H9, where using darks usually gives worse results than without darks). Taken from the middle of Berlin with a Skywatcher ED120 plus Skywatcher 0.85 reducer on a H-EQ5 Synscan mount. Atik 383 L+ camera with Baader Halpha and OIII filters, 17x20 minutes Ha and 14x20 minutes OIII, combined to a Ha:OIII:OIII. http://ccd-astronomy.de/temp4/6992coloursmallneugut.jpg Stefan |
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ASTRO: Eastern Veil with Atik 383
Love the detail - there is a three dimensional appearance to this
image. On Sun, 8 Aug 2010 22:34:59 +0200, "Stefan Lilge" wrote: I spent four (short) nights for a total of 10 hours imaging time in the first half of July on the eastern part of the cirrus nebula (NGC 6992/6995). The larger chip of my (rather) new Atik 383 camera allowed for a larger scale than previous attempts with my SXV-H9 camera. Nights were very warm, one of them well above 20 degrees celsius, so I could only cool the camera to -15 degrees that night. I didn't have darks for that temperature (only for -20 deg), so I had to scale the darks, but scaled them the wrong way (dividing the dark signal by 2 instead of multiplying with 2). That error didn't seem to have much effect on the final image as the 8300 chip has a rather low dark current (but still benefits from darks, unlike the SXV-H9, where using darks usually gives worse results than without darks). Taken from the middle of Berlin with a Skywatcher ED120 plus Skywatcher 0.85 reducer on a H-EQ5 Synscan mount. Atik 383 L+ camera with Baader Halpha and OIII filters, 17x20 minutes Ha and 14x20 minutes OIII, combined to a Ha:OIII:OIII. http://ccd-astronomy.de/temp4/6992coloursmallneugut.jpg Stefan |
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