Colloquia, Invited Review Talks, and Panels
- “X-Ray Spectra of BL Lac Objects: Evidence for Absorption by Hot Gas” Astrophysics Colloquium Massachusetts Institute of Technology, (December 1985)
- “X-Ray and γ-Ray Observations of Astrophysical Jets,”Conference on Astrophysical Jets, Taos, New Mexico (August 1985)
- “X-Ray and Ultraviolet Observations of Jets in Active Galaxies” Astrophysics Colloquium Los Alamos National Laboratory, (March 1985)
- “Luminosity Functions of BL Lacertae Objects” Astrophysics Seminar Harvard University, (October, 1984)
- “The Effect of Relativistic Beaming on Luminosity Functions” Astrophysics Seminar Massachusetts Institute of Technology, (October 1984)
- “Relativistic Jets Inferred from the Spectra of BL Lacertae Objects” Astrophysics Colloquium Massachusetts Institute of Technology, (September 1983)
- “BL Lac Objects as Beamed Active Galactic Nuclei” The Johns Hopkins University, Space Sciences Seminar (October 1982)
- “Relativistic Beaming in Active Galactic Nuclei” Istituto di Fisica Cosmica, Milan, Italy (September 1982)
- “BL Lac Spectra from HEAO1” Director’s Science Seminar NASA Goddard Space Flight Center, (July 1982)
- “The Synchrotron Self-Compton Model in Active Galactic Nuclei” Space Sciences Seminar The Johns Hopkins University, (October 1981)
- “Relativistic Jet Models for BL Lac Objects” Laboratory for High Energy Astrophysics Journal Club NASA Goddard Space Flight Center, (June 1981)
- “X-Ray Observations of BL Lacertae Objects” Director’s Science Seminar NASA Goddard Space Flight Center, (May 1981)
- “Relativistic Jets Inferred from the Spectra of BL Lac Objects,” Colloquium University of Maryland, (March 1981)