Ara Chutjian, Visiting Scientist, California Institute of Technology. 

 "Measuring the Absolute Cross Section for the Dielectronic 

 Recombination Process in Triply Ionized Carbon," with John Kohl, 

 from September 7, 1987 to September 25, 1987. 



John Cowan, Visiting Scientist, University of Oklahoma. "The 



Nucleosynthetic Production of Heavy Nuclei in Evolved Stars," 

 with George Rybicki and A.G.W. Cameron, from August 1, 1987 to 

 September 30, 1987. 



Ian Evans, Visiting Scientist, Space Telescope Science Institute. 

 "Computer Photoionization/Shock-modelling of Astrophysically 

 Interesting Cases of High Density Plasmas," with John Raymond, 

 from July 5, 1987 to July 31, 1987. 



Guido Garay, Visiting Scientist, Harvard University. "Analysis and 

 Publication of Radio Astronomical Data," with James Moran and 

 Patrick Thaddeus, from May 13, 1987 to June 12, 1987. 



William R.S. Garton, Visiting Scientist, York University. "The Use of 

 Synchronton Light for VUV Spectroscopy of Molecules such as CO," 

 with W.H. Parkinson, from May 16, 1987 to May 27, 1987. 



Gerard Gillanders, Predoctoral Fellow, University College, Dublin. 

 "The Detection of Ultra-High Energy Gama Rays from Cygnus X-3 

 and Other Possible Sources such as Hercules X-l," with 

 Trevor Weekes, from January 1, 1987 to August 31, 1987. 



Patrick Hartigan, Postdoctoral Fellow, University of Arizona. 

 "Studies of T Taurus Stars," with Irwin Shapiro, from 

 August 1, 1987 to July 31, 1988. 



Thomas Hartquist, Visiting Scientist, Harvard University. "Modelling 

 of Dense Molecular Photodissoc iation Zones and Interstellar 

 Hydroxyl Masers," with Alex Dalgarno, from February 2, 1987 to 

 February 28, 1987. 



Philip Judge, Visiting Scientist, Oxford University. "Calculating 

 Model Stellar Atmospheres Based on Sulphur Atomic Data," with 

 Eugene H. Avrett, from July 18, 1987 to August 10, 1987. 



Laurent Koechlin, Visiting Scientist, University of Paris. 



"Development of Image Processing Techniques for Interference 

 Fringe Detection," with Peter Nisenson, Wesley Traub, and 

 Michael Shao, from November 1, 1986 to April 30, 1988. 



Lawrence Krauss, Visiting Scientist, Massachusetts Institute of 



Technology. "The Interface of Elementary Particle Physics and 

 Cosmology/Astrophysics," with Alan Lightman, from November 1, 1986 

 to April 30, 1988. 



Ping-wai Kwok, Predoctoral Fellow, University of Arizona. 



"Observational and Experimental High Energy Cosmic Gamma Rays 

 Using Atmospheric Cherenkov Technique," with Trevor Weekes, from 

 September 1, 1987 to August 31, 1988. 



77 



