Electric Swan – Narrowband

Electric Swan – Narrowband

M17

Ra: 18h 20m 48s
Dec: -16d 10m 40s
Distance: 5,000 light years
Image Size: 36' x 24'
North: Up

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Description

9 20 min exposures. Astrodon 6nm FWHM 92%T H-a filter and 6 30 min exposures from Astrodon SII and OIII filters. North is up and the FOV is approx 30 x 25 arcmin.
Hubble Color Pallete: R=SII, G=H-a, B=OIII.

Rob Gendler has an excellent description of M17 at http://www.robgendlerastropics.com/M17text.html. This region is only 5000 light years distant and represents a huge HII, molecular cloud and star-forming region that is a strong radio souce. You can see a "horseshoe shape" closed on the left and opening toward the right that was carved out by UV flux of hot stars, according to Rob’s write-up. This is accentuated by the tricolor narrowband method that enhances structural contrast.

Exposure: 9 hrs; 3 each of 6nm H-a, SII, OIII
Telescope: RCOS 16
Mount: Software Bisque Paramount ME
Acquisition: CCD AutoPilot3
Calibration: CCDStack
Observatory Site: Sierra-Remote Observatories, Shaver Lake, CA
Camera: SBIG STL11000
Filters: Astrodon 6 nm H-a, OIII, SII
Guider: SBIG ST-402
Camera Operation: MaximDL4.62
Processing: Photoshop CS2
Image Date: 06/19/2007

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