His PhD involved participating in the construction of the UK's first space-based X-ray telescope and, subsequently, analyzing data from that instrument.
At NASA, and since, he worked with other space-based telescopes to investigate the Universe at extreme temperatures and gravities, exploring the boundaries of Einstein's theory of General Relativity.
Since then he has also been a frequent user of international ground-based telescopes.
My main research interest is in instrumentation and data analysis for high energy astrophysics.
I am a co-investigator for the IBIS imaging telescope on the European Space Agency's INTEGRAL space telescope mission, operating successfully since its launch in 2001.
I am responsible for compilation of the all-sky survey from IBIS.