Horsehead M95 Horsehead

(Click on image for Full Resolution)

Date: March 4, 2006
Exposure: LRGB 350:135:180:135 35 X 600s L, 9 X 900s R & B, and 12 X 900 G
Processing: CCDAutoPilot3 in control for all images - CCDSoftV5 for image acquisition. CCDStack for image calibration,(5 each LRGB flats, bias subtracted and Sigma Clip combined, 60 bias frames median combined, 20-900s darks Sigma Reject combined), alignment, normalization, and RGB combine. 5 interations of CCDSharp on Lum frame. Photoshop CS for LRGB processing, final adjustment and jpg conversion.
Conditions: Average to good to poor
Scope: RCOS 16" Truss @ f/6
Camera: ST-10XME/CFW-8A -15°
Comments: This was taken over a span of 5 days. The FWHM varied from a low of 2.6" to a high of 4.3" on 15 min images. The jet stream sat over top of me the entire time so the imaging didn't produce any great FWHM. The Green frames were especially poor on the second night with FWHM in the 3.6-4.0 range. The Blue was also very soft and the worst of the lot so I ran a single iteration of CCDSharp on it to bring it close to the Red and Green frames. This helped the color abit and firmed up the stars some too. As always, the light pollution was terrible and it took a long time to tame the gradients as best I could.