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The image above is a 1/4 resolution view, 1002 x 668 pixels ~ 0.2 MB.

Click here for a 1/2 resolution view, 2004 x 1336 pixels ~ 1.6 MB.

Click here for a full resolution view, 4008 x 2672 pixels ~ 5.8 MB.

 

Image Information:

Date(s)	September 3, 2006
Optics	Takahashi BRC-250 10 inch f/5 Ritchey-Chrétien astrograph with a 1,268 mm focal length
Mount	Losmandy G-11 with Gemini Level 3 V 1.1
Camera	SBIG STL-11000M on loan from CSU Fresno Physics Department (thanks to Fred Ringwald)
Guiding	Internal selfguiding, no dithering
Field Scale	1.45 arc seconds / pixel
FOV	96 x 67 arc minutes
Camera Cooling	-15 C Regulated Thermoelectric
Filter(s)	10nm Ha filter by Custom Scientific
Location	Shaver Lake, California at 5610 feet.
Exposure(s)	Ha = 8 x 1200 seconds (2.6 hours total)
Binning	Ha = 1x1
Camera control	MaxIm DL 4 V 4.53
Processing software	MaxIm DL 4 V 4.53, Photoshop CS2 V 9.0
Image notes	This image is of the Eastern portion of the Veil Nebula.  Processed images were fully calibrated, aligned, sigma clip combined and unsharp-masked.

 

CCDWare's CCDInspector has been used to measure the FWHM values of several thousand stars in the field and fits a 3-D polynomial surface to them showing field curvature and or collimation accuracy as a function of stellar profiles. 

 

 

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