M1, Supernova remnant in Taurus


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Description: Also known as the Crab nebula, this is the remnant of a supernova that was observed in 1054.  Near the center of the object is a neutron star, 30 Km in diameter and approximately the mass of our sun that is thought to rotate at 30 times per second!  This star is the lower right of the double star visible in the center.
Exposure Data: 11/13,14/2002.  LRGB: 16x10m, 8x7m, 8x7m, 8x10m, RGB 2x2. -15C, 1.0 arc-sec./pixel.
Processing: Acquired via script with Maxim, reduced and aligned, gradient correction in Mira, L: 1xCCDSharp, RGB combined 1.0:0.9:1.16 in Maxim, LRGB assembly, curves, levels, USM other processing in Photoshop.
Optical System: 10 Ritchey-Chretien @ F/7.3, ST-8E USB NABG/CFW-8A CCD camera, auto-guided, Paramount ME mount.
Comments: Seeing was 3.0 arc-sec.   The colors were combined using a G2V calibrated ratio, boosted to correct for the OIII overlap to an equivalent 1.8 blue.  A more aggressively processed version to show the Hydrogen region is here.