Target: Horsehead Nebula or Barnard 33 Date: 2012-10-09 Time: 16:53 Telescope: CDK20S Camera: Apogee U16 Filters: UBVRI Exposure time: 100 seconds each filter Observer: Rhodes Hart Processing: John Kielkopf Colors at the center of the field are approximately correct for visual response. The images are not flat fielded, and the vignetting changes the color balance progressively away from the center.

A brief introduction to the XPA messaging system, which provides seamless communication between all kinds of Unix event-driven programs, including X programs, Tcl/Tk programs, and Perl programs. ... A program becomes an XPA-enabled server by defining named points of public access through which data and commands can be exchanged with other client programs (and users). ... An XPA name server program, xpans, through which XPA access point names are registered by servers and distributed to clients. ...