M27 - THE DUMBBELL NEBULA in VULPECULA - Cetin BAL - GSM: +90 05366063183

M27 - THE DUMBBELL NEBULA in VULPECULA - 1000 x 763 pixels

12.5" RCOS RC and Paramount ME mount - SBIG STL-6303e - Mapped Color (SII/Ha/OIII) - 120:300:80 minutes

M27 - THE DUMBBELL NEBULA in VULPECULA - 1600 x 1221 pixels

12.5" RCOS RC and Paramount ME mount - SBIG STL-6303e - Mapped Color (SII/Ha/OIII) - 120:300:80 minutes

Location: Ballauer Observatory near Azle, Texas
Date: June 24th and 25th, 2005
Seeing: 9/10
Transparency: 2/10 (shot near full moon phase)
Temperature: 69 to 72 degrees F (camera at -15c)
Scope/Mount: 12.5" RCOS RC and Paramount ME
Camera: SBIG STL-6303e astro CCD camera
Filters: Custom Scientific 4.5nm Ha, OIII, and SII spectral line filters.
Exposure Info: Mapped color image - SII/Ha/OIII - 120:300:80 minutes (20 minute subexposures unbinned))
Processing Information: Calibration, Registration, Hot/Cold Pixel removal, and DDP in MaxIm DL 4. LR Deconvolution on Ha channel in CCDSharp. Color mapping, cropping, color balance, levels/curves, sharpening, and noise removal in Photoshop CS.

Exposure Notes: This represents my first "mapped color" image taken with narrowband, spectral line filters. The SII data is mapped to the red channel, Ha to green, and OIII to blue. Seeing was exceptional, in the 1" arc second neighborhood, but data was taken near a full moon.

Hiçbir yazı/ resim izinsiz olarak kullanılamaz!! Telif hakları uyarınca bu bir suçtur..! Tüm hakları Çetin BAL' a aittir. Kaynak gösterilmek şartıyla siteden alıntı yapılabilir.

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