André Lallemand

André Lallemand (born September 29, 1904 in Cirey-lès-Pontailler , † March 24, 1978 in Paris ) was a French astronomer . He was director of the Institut d'astrophysique de Paris and from 1961 to 1974 professor of experimental methods in astronomy at the Collège de France .

Lallemand studied at the University of Strasbourg and was there from 1925 assistant at the observatory, then headed by Ernest Esclangon . He was also at the laboratory of Pierre-Ernest Weiss in Strasbourg and received his agrégation in physics in 1927. Then he was assistant to André Danjon at the Strasbourg observatory, who replaced Esclangon as head in 1929. First he was an assistant astronome, then from 1938 he was an astronome-adjoint. During the Second World War he was first exiled to Clermont-Ferrand with the University of Strasbourg and in 1943 he followed Danjon to the Paris Observatory. In 1953 he was appointed astronomer there. He became a professor at the Collège de France in 1961 and followed Danjon as director of the Institute for Astrophysics in Paris.

Lallemand is known for the development of electronic cameras with photo multipliers in astronomy. He made his first suggestions as early as 1933 (called caméra Lallemand ). Interrupted by the war, he resumed development in 1949 with the first photos taken in this way in the 1950s.

In 1929 he was on a trip with Danjon and Rougier to observe the total solar eclipse in Indochina , where the first infrared photos of the sun's corona were taken.

In 1962 he received the Eddington Medal . In 1961 he became a member of the Académie des Sciences , which named an award after him. From 1960 to 1962 he was president of the Société astronomique de France . The lunar crater Lallemand bears his name.

Web links

• Publications by A. Lallemand in the Astrophysics Data System
• A. Heck: Strasbourg Astronomical Observatory and its multinational history , 2005