Acquired from Sierra Remote Observatories in Northern California in May 2014 Luminance: 19 x 900s R,G,B: 8 x 900s each Total exposure time: ~8.25 hours Main Camera: QSI 883 WSG Guide Camera: SXV Lodestar (on OAG) Mount: Paramount ME Scope: AT 10 RC f/8 Image Aquisition software MaximDL Registed, Calibrated and Stacked and Post Processed with PixInsight 1.8
Large galaxies and faint nebulae highlight this deep image of the M81 Group of galaxies. First and foremost is the grand design spiral galaxy M81, the largest galaxy visible in the image. M81 is gravitationally interacting with M82, a big galaxy with an unusual halo of filamentary red-glowing gas. Around the image many other galaxies from the M81 Group of galaxies can be seen. Together with other galaxy congregates including our Local Group of galaxies and the Virgo Cluster of galaxies, the M81 Group is part of the expansive Virgo Supercluster of Galaxies. This whole galaxy menagerie is seen through the faint glow of an Integrated Flux Nebula, a little studied complex of diffuse gas and dust clouds in our Milky Way Galaxy. [Description adapted from NASA APOD] Last Saturday, Jan 4, I finally got to do some astrophotography away from my backyard after almost three months. I set up at Lake Sonoma, CA and managed to squeeze in about 11 hours of imaging time. The image above is the result of stacking: 20 x 6m each (R,G,B) 28 x 10m L On the following night I set up in my light polluted backyard and acquired some Ha to punch up the star forming regions in M82 and the filaments in M81. I only added: 8 x 30m Ha Total Exposure Time: ~15 hours. Main Camera: QSI 583 WSG Guide Camera: SXV Lodestar (on OAG) Mount: Astro-Physics Mach 1 Scope: Explore Scientific 102 ED Effective focal length: 698 mm Image Aquisition software MaximDL Registed, Calibrated and Stacked in MaximDL Post Processed with PixInsight 1.8 and Photoshop CS6 (RA, Dec) center: (148.709186455, 69.2845326306) degrees Orientation: 0.72 deg E of N I can honestly say that I would have been happier exposing one more night. This was my first time processing M81/M82 looking to extract some IFN nebulosity, and (lots) more subs would have made the job much easier and less painful. It took me considerably more hours to process this image than to acquire it. Still, I think the noise that comes through is tolerable and I hope I haven't gone overboard - though I'm always open to constructive criticism.
This is result of stacking the following sub-exposures: L: 23 x 10m R: 23 x 10m G: 16 x 10m B: 17 x 10m Total exposure time: 13.2 hours Main Camera: QSI 583 WSG Guide Camera: SXV Lodestar (on OAG) Mount: Astro-Physics Mach 1 Scope: Celestron Edge HD 8" (FL: 2032mm) Adaptive Optics Unit: SXV-AO-LF Image Aquisition software MaximDL Registed, Calibrated and Stacked in MaximDL Post Processed with PixInsight 1.8 Description adapted from NASA APOD: NGC 3718, the warped spiral galaxy is near picture center. A mere 150 thousand light-years to the bottom is another large spiral galaxy, NGC 3729. The two are likely interacting gravitationally, accounting for the peculiar appearance of NGC 3718. While this galaxy pair lies about 52 million light-years away, the remarkable Hickson Group 56 can also be seen clustered to the right of NGC 3718, near the top of the frame. Hickson Group 56 consists of five interacting galaxies and lies over 400 million light-years away.
