M1: The Crab Nebula

The Crab is the remnant of a supernova in the constellation of Taurus (the Bull). It exploded in 1054 A.D.

Images taken: 5, 24, 26 of March 2008 by Gandy Cutrer, Dan Woten, Saran and Brian Simonson.

Telescope: Meade 12 in with f/5.7 focal reducer (f=68in) in Kennon Observatory.

Camera: SBIG ST-10 CCD

Exposures: 15 min (red), 15 min (green), 2 x 15 min (blue).

Exposures: 3 x 30 min red, green, blue; 40 min H-alpha, 52 min [OIII], 57 min [SII].

Images taken: Feb. 5 & 6, 2007 by Arunava Roy.

Telescope: Meade 12 in with f/5.7 focal reducer (f=68in) in Kennon Observatory.

Camera: SBIG ST-10 CCD

Exposures: 15 min (red), 15 min (green), 2 x 15 min (blue).

The pulsar is barely detectable on the magnified image:

Image processing: CCDoops + CCDsoft + CCDSharp + Photoshop CS.

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Images taken: Feb 26 and March 3, 2006.

Telescope: Meade 8 in with f/5.6 focal reducer (f=28in), resulting in 2.6 as/pixel, guided with AO7 on a 6.9mg star at T=-20C.

Camera: SBIG ST-7 CCD

Exposures: 20 min (red), 30 min (green), 45 min (blue). Guided on a 9.3 mg star.

This is the difference light pollution makes. The image on the left was taken two miles out of town, the one on the right was taken from the parking lot in front of Kennon Observatory. Look at the noise level, and see how much detail is obscured by the streetlights. The two pictures are identically taken and processed.

Image processing: CCDoops, CCDsoft + Photoshop CS.