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Selected astroimages from 2004 through 2019 including galaxies, light and dark nebulas, planetary nebulas, globular star clusters, open clusters, and miscellaneous objects. Images are in approximate chronological order with exceptions. Earliest data were captured with a SBIG ST8-XE or STL-11000M research grade CCD camera and Takahashi FSQ 106 astrograph refractor or Optical Guidance Systems Ritchey-Chretien 12.5 inch telescope operating in Palm Springs, California. Beginning in April, 2008 some images were obtained on a 24 inch R-C telescope with 11000M camera atop Mt. Lemmon near Tucson, Arizona. In October, 2010 this was replaced by the 32 inch Schulman Foundation R-C telescope (generally known as the "Schulman telescope") maintained on Mt. Lemmon by the University of Arizona. The 11000M camera initially used on the 32 inch scope was replaced by an STX-16803 in early 2011. In 2019 the Schulman telescope became available for online astroimaging by amateurs and professionals under the management of the University of Arizona SkyCenter.
Image capture and processing for the images displayed here utilized specialized software including TheSky6 Professional Edition, ACP Planner and Capture, CCDStack, Adobe Photoshop, Noise Ninja, MaximDL, RegiStar, PixInsight, FITS Liberator, Filezilla, and CCDSharp. Total exposure times for each image were typically 3 - 6 hours and in some cases over 20 hours. Luminance frames were generally processed separately from RGB color composites which were then united in Photoshop. H-alpha blending used various techniques.
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THE 32 INCH SCHULMAN TELESCOPE AND ITS SUPPORT SYSTEMS ARE ENGINEERED FOR FULLY REMOTE OPERATION AND PROVIDE AN IMPORTANT FACILITY FOR WORLDWIDE USE OVER THE INTERNET BY AMATEUR AND PROFESSIONAL ASTROPHOTOGRAPHERS AND ASTRONOMERS. For further information and to obtain access please visit the Schulman Telescope web site at www.schulmantelescope.org or contact the University of Arizona Science SkyCenter (Mt. Lemmon SkyCenter) at http://Skycenter.arizona.edu.
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