M27 Narrowband
First mapped color narrowband image test.
Mapped color: R=Ha; G=S[II]; B=O[III]
Hubble palette (R=S[II]/G=Ha/B=O[III]) not used due to limited intensity of S[II] data.
Image acquisition date: June 18, 19 & 20, 2010.
Camera: SBIG STL11000M
Filters: AstroDon Ha, S[II], O[III] narrowband filters (5nm FWHM)
Camera control software: CCDSoft
Guiding/adaptive optics: STL internal guiding chip.
Camera temperature: -10C and +5C
Telescope: Astro-Physics 155EDF with 4" field flattener, 1178mm focal length (F7.6).
Telescope control software: TheSkyX, PemproV2, Focusmax
Mount: Astro-Physics 1200GTO
Total exposure time:
120 minutes Ha, 140 minutes S[II], 60 minutes O[III]
20 minutes subexposures, unbinned
Image scale 1.57 arc sec per pixel
Conditions: Extremely hot and humid (91-99%), dew point close to air temperature.
Setting 40-70% moon. Altitude (28 to 64 degrees). Due to the humidity and dew point,
the ccd chamber window began to frost at -10C after a few exposures, and I was forced
to raise the temperature to +5C.
Processing: CCDStack2, Photoshop CS5.
Mapped color: R=Ha; G=S[II]; B=O[III]
Hubble palette (R=S[II]/G=Ha/B=O[III]) not used due to limited intensity of S[II] data.
Image acquisition date: June 18, 19 & 20, 2010.
Camera: SBIG STL11000M
Filters: AstroDon Ha, S[II], O[III] narrowband filters (5nm FWHM)
Camera control software: CCDSoft
Guiding/adaptive optics: STL internal guiding chip.
Camera temperature: -10C and +5C
Telescope: Astro-Physics 155EDF with 4" field flattener, 1178mm focal length (F7.6).
Telescope control software: TheSkyX, PemproV2, Focusmax
Mount: Astro-Physics 1200GTO
Total exposure time:
120 minutes Ha, 140 minutes S[II], 60 minutes O[III]
20 minutes subexposures, unbinned
Image scale 1.57 arc sec per pixel
Conditions: Extremely hot and humid (91-99%), dew point close to air temperature.
Setting 40-70% moon. Altitude (28 to 64 degrees). Due to the humidity and dew point,
the ccd chamber window began to frost at -10C after a few exposures, and I was forced
to raise the temperature to +5C.
Processing: CCDStack2, Photoshop CS5.
