M 1, Crab Nebula
Submitted by Planewave Instruments
© Mandell, GordonTarget: M1 (NGC 1952, Crab Nebula, supernova remnant in Taurus)
Distance from Earth: 6300 light-years
Image FOV: 29 x 23 arcmins
Telescope: PlaneWave CDK 20 (f6.8) (for LRGB) and Takahashi TOA-130 refractor with TOA-130 0.78x reducer (f6.0) (for Ha & O3)
Camera: FLI ProLine PL11002M ccd (for LRGB) and Starlight Xpress SXVF-H9 ccd (for Ha and O3)
Images: Ha and O3 data captured from my own observatory in Pittsburgh, PA at an image scale of 1.64 arcsecpixel; 30, 1200 sec subexposures, 360 minutes with the Ha filter on Nov 13, 14, 2009 and 240 minutes with the O3 filter on Nov 18, 2009. LRGB data captured from GRAS-011 in Mayhill, NM at an image scale of 0.54 arcsecpixel; 30, 180 sec subexposures; 45 minutes (L), 15 minutes (R), 15 minutes (G) and 15 minutes (B), 90 minutes on Jan 22, 2011; total exposure time of 700 minutes
Processing: MaxIm DL 5.12, RegiStar 1.0 and Photoshop CS3 with GradientXTerminator and Noise Ninja; final image scale 0.54 arcsecpixel, image cropped