by Chris Schur » Mon Jan 17, 2011 3:33 pm
The Crab Nebula in Taurus
http://www.schursastrophotography.com
Copyright: Chris Schur
This unusual image is the result of long exposures in the Red, Blue, Green normally, Hydrogen Alpha 3nm, and a separate set of exposures on the inner continuum radiation with RGB and polarizers crossed 120 degrees for each color. The result is an inner region that is mapped in polarization according to color. The outer filaments are primarily HII and OIII regions and have no polarization.The Object:The Crab Nebula in Taurus is a super nova remnant that exploded in in the year 1084AD and has been rapidly expanding ever since. It is located a degree from the easternmost star in the Bulls horns, and glows dimly at a magnitude of 8.4. While small at 6 arc minutes, it is typical of the size of many galaxies in my telescope, and thus made a good target for my galaxy hydrogen enhancement technique. Look carefully at the lower left of this image, you will see a passing asteroid Anahita. It was 12.2 magnitude at this time, and was the 270th asteroid ever found.
Instrument: 12.5" f/5 Home made Newtonian
Mount: Astrophysics 1200 QMD
CCD Camera: SBIG 10XME NABG with Enhanced Water Cooling
Guider: Meade DSI Pro w/Lumicon Newt Easy Guider
Exposure: LRGB = Ha+RGB = 170:40:40:40 + Polarized RGB = 20:20:20
AstroDon RGB Combine Ratio: 1: 1.05: 1.2
Location: Payson, Arizona, Elevation: 5150 ft.
[size=120][b]The Crab Nebula in Taurus[/b][/size]
http://www.schursastrophotography.com
Copyright: Chris Schur
[img2]http://www.schursastrophotography.com/images/ccd/m1RGBPolar1600.jpg[/img2]
This unusual image is the result of long exposures in the Red, Blue, Green normally, Hydrogen Alpha 3nm, and a separate set of exposures on the inner continuum radiation with RGB and polarizers crossed 120 degrees for each color. The result is an inner region that is mapped in polarization according to color. The outer filaments are primarily HII and OIII regions and have no polarization.The Object:The Crab Nebula in Taurus is a super nova remnant that exploded in in the year 1084AD and has been rapidly expanding ever since. It is located a degree from the easternmost star in the Bulls horns, and glows dimly at a magnitude of 8.4. While small at 6 arc minutes, it is typical of the size of many galaxies in my telescope, and thus made a good target for my galaxy hydrogen enhancement technique. Look carefully at the lower left of this image, you will see a passing asteroid Anahita. It was 12.2 magnitude at this time, and was the 270th asteroid ever found.
Instrument: 12.5" f/5 Home made Newtonian
Mount: Astrophysics 1200 QMD
CCD Camera: SBIG 10XME NABG with Enhanced Water Cooling
Guider: Meade DSI Pro w/Lumicon Newt Easy Guider
Exposure: LRGB = Ha+RGB = 170:40:40:40 + Polarized RGB = 20:20:20
AstroDon RGB Combine Ratio: 1: 1.05: 1.2
Location: Payson, Arizona, Elevation: 5150 ft.