Horsehead NGC 660 Horsehead

(Click on image for Full Resolution)

Date: Oct-Nov , 2006
Exposure: LRGB 180m:90m:90m:90m 36 x 300s L, 29 x 600s R, G, B
Processing: CCDSoftV5 for image acquisition, CCDStack for Image calibration, Astrodon LRGB filters (5 flats each L, R,G,B, Bias subtracted and Sigma Clip combined, 40 bias frames Sigma Clip combined, 25 600s darks Sigma Clip combined), alignment, normalization, FITS files creation. CCDAutoPilot3 used to collect data over multiple nights. Photoshop CS2 for final LRGB processing, final layers adjustment and jpg conversion.
Conditions: Average to Good, Mag 4-5 Skies
Scope: RCOS 16" Truss
Camera: SBIG STL-6303, -25°
Comments: This took 7 nights over 2 months to get enough data to make this come out. The best nights were used for the Lum data and CCDInspector was reporting FWHM between 1.5 and 1.8" for a 10 min exposure. This was after the recollimation of the RC which was done due to a better understanding of the process from attending the AIC conference in San Jose, Ca. Also, I used a few of the techniques learned at the conference to tease some of the faint arms out of the background.