N-band observations of comet Austin 1989cl: first images with the CIOmu camera

Details N-band observations of comet Austin 1989cl: first images with the CIOmu camera N-band observations of comet Austin 1989cl: first images with the CIOmu camera

Aug 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993a%26a...275..345l&link_type=abstract

Astronomy and Astrophysics, Vol. 275, p. 345 (1993)

Astronomy and Astrophysics

Astrophysics

1

Comets, Infrared Radiation -Instrumentation

Scientific paper

We report here on the first observations obtained with the mid-infrared camera C1Oμ, mounted on the Canada-France-Hawaii Telescope in May 90. The main originality of this camera relies on its LETI/LIR detector array, whose large well capacity (>107 electrons) made easy broad-band imaging observations over the entire atmospheric window (8-13 μm). As an illustration of the camera capabilities, we present high-angular resolution (0.7" pxl-1) N-band images of comet Austin. At the time of the observations (1990 May 6.6 UT), the comet was located at 0.45 AU from the earth, so that we were able to measure the surface brightness profile over a range of distances from the nucleus (300-3000 km) not yet well studied.

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