SH2-240, supernova remnant

The Object
SH2-240, central region
A very faint object too large for my field of view. Possibly a supernova remnant judging by the circular shape visible in larger images. Information on the web..

The Process

• 37 4 Minute lights captured 01/11/10 with Nebulosity 2
• 5 bad columns removed with my Fixfits utility
• stacked with 100 flats and 100 bias frames in DeepSkyStacker.
• Processed in PixInsight Core 1.5 with DBE, Background and Color Calibration, histogram transformations, ACDNR, SCNR, L-masked Saturation curves.
• The monitor used during processing was calibrated using Spyder3Elite. The image was processed and published using the sRGB color profile for the widest possible compatibility. FireFox 3.5 has color management capabilities enabled by default.

The Hardware

• Celestron C11 with HyperStar 3 (F/2)
• QHY8 with IDAS-LPS filter
• EQ6/Atlas EQ/G controlled by EQMOD
• Guided with a DSI-Pro and PHD
• Focused with a self made Bahtinov mask
• Kept dew free with Dew-Buster
• Images of the setup

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