M27 Dumbbell Nebula in Hydrogen Alpha Light

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Ha only

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Ha only (boosted processing to show the outer ring)

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Ha and [OIII] data (Ha = Red, Green = Blue = OIII)


taken on August 28, 2003 from Fremont Peak State Park, near San Juan Bautista, Ca. ([OIII data])and on September 1, 2003 from my backyard in Castro Valley, Ca. (Ha data)

Celestron C14 imaging scope @ f/11 (F=3910mm)

Finger Lakes Instrumentation IMG1024S imaging camera @-30C (Ha) and at -27C ([OIII])

RCOS Optical Systems Dichroic Beam Splitter

SBIG ST7E Guide camera controlling 

SBIG AO7 Adaptive Optics System

Astro-Physics AP1200GTO mount

Finger Lakes Instrumentation CFW1 Color Filter wheel

Custom Scientific Narrowband Emission Line Filters

   Hydrogen alpha        656.3nm  3nm FWHM

   [Oxygen III]                 500.7nm  3nm FWHM

Eight exposures of fifteen minutes through Ha filter, three exposures of 10 minutes through [OIII] filter

Total exposure time: 2 hours 30 minutes

Maxim DL 3.20 used for image acquisition, calibration, DDP, color combination

CCDSOFT 5.00.071 used for guiding/AO7 control

SIGMA Prebeta 11 used for darks, flats and image stacking

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