1.   Harvard-Smithsonian Center for Astrophysics (1999) Chandra X-Ray Observatory Center [WWW] http://xrtpub.harvard.edu/index.html (April 30, 2000)

2.   Penn State University Department of Astronomy and Astrophysics (1999) High Energy Astrophysics at Penn State [WWW]  http://www.astro.psu.edu/xray/axaf/xrcf/ (April 30, 2000).

3.   Davies, John K. Astronomy From Space: The Design and Operation of Orbiting Observatories. In: Joint Astronomy Center, Hilo, Hawaii. New York: John Wiley and Sons; 1997. 2-3.

4.   Harvard-Smithsonian Center for Astrophysics (1999) Chandra X-Ray Observatory Center [WWW] http://xrtpub.harvard.edu/about/top_ten.html (April 30, 2000).

5.   Harvard-Smithsonian Center for Astrophysics (1999) Chandra X-Ray Observatory Center [WWW] http://xrtpub.harvard.edu/press/fact4-1.html  (April 30, 2000).

6.      Astrophysical Research Consortium. (1998) Welcome to Apache Point Observatory [WWW] http://www.apo.nmsu.edu/ (October 20, 1999).

7.   Kastner, J.H. et. al.  1997. X-ray and Molecular Emission from the Nearest Region of Recent Star Formation. Science, Volume 277, pp. 67-71.

8.   Simon, M. et. al.  1999. Adaptive optics imaging of the Orion Trapezium cluster. Astron. J., Volume 117, pp. 1375-86.

9.   Centre de Données astronomiques de Strasbourg (1999) SIMBAD Astronomical Database [WWW] http://simbad.u-strasbg.fr/Simbad (April 30, 2000)

10.  The raw images attained from the observing run, were reduced by Joel Kastner.

11. The two procedures are included in the Thompson Library of IDL routines.

12. The procedure, xyouts, is included in the standard IDL library