'VISIR' - A visible and far-infrared source for the calibration of telescopes

Details 'VISIR' - A visible and far-infrared source for the calibration of telescopes 'VISIR' - A visible and far-infrared source for the calibration of telescopes

Dec 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979infph..19..693p&link_type=abstract

Infrared Physics, vol. 19, Dec. 1979, p. 693-697.

Astronomy and Astrophysics

Astronomy

1

Calibrating, Far Infrared Radiation, Infrared Astronomy, Light Sources, Telescopes, Design Analysis, Reference Stars, Surface Temperature, Thermal Shock

Scientific paper

Telescopes designed for astronomical observations from aircraft, balloons or satellites have to be aligned in the laboratory. Both operations have to be repeated in the field, and calibration should be absolute and extend over a wide range. With these requirements in mind, a new type of source is developed which has significant emission simultaneously in the visible and IR, hence the name VISIR. Its brightness is estimated with good accuracy between 30 and 200 microns. Simultaneous visible emission allows IR alignments to be performed with the naked eye.

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