A mid-infrared (8 22 µm) camera, equipped with a Hughes hybrid bulk Si:As array detector of 10 × 64 pixels was developed for the 1.5 m Italian Infrared Telescope (TIRGO). The instrument was used for narrow-band 8 14 µm high-background astronomical observations. Here we present a short description of the camera, including its fast readout electronics and its optical design. When used at TIRGO, the camera has a pixel scale of 1.23 arcsec/pix. From the observations of infrared standard stars we derived a noise equivalent flux density (NEFD) that, for all the filters, is in the range 0.5 0.7 Jy × arcsec<SUP>-2</SUP> xmin<SUP>-1/2</SUP> and a point spread function (PSF) of the order of 3 arcsec(FWHM). Mosaics of the extended sources Mars at 8.8, 9.8, and 12.5 µm, and of the star forming region Orion BN-KL Nebula at 12.5 µm, are shown. The camera performances are also illustrated on the basis of the image of the post-AGB source CRL618.

Tircam: A mid-infrared camera for ground-based astronomy

BUSSO, Maurizio Maria;
1994

Abstract

A mid-infrared (8 22 µm) camera, equipped with a Hughes hybrid bulk Si:As array detector of 10 × 64 pixels was developed for the 1.5 m Italian Infrared Telescope (TIRGO). The instrument was used for narrow-band 8 14 µm high-background astronomical observations. Here we present a short description of the camera, including its fast readout electronics and its optical design. When used at TIRGO, the camera has a pixel scale of 1.23 arcsec/pix. From the observations of infrared standard stars we derived a noise equivalent flux density (NEFD) that, for all the filters, is in the range 0.5 0.7 Jy × arcsec-2 xmin-1/2 and a point spread function (PSF) of the order of 3 arcsec(FWHM). Mosaics of the extended sources Mars at 8.8, 9.8, and 12.5 µm, and of the star forming region Orion BN-KL Nebula at 12.5 µm, are shown. The camera performances are also illustrated on the basis of the image of the post-AGB source CRL618.
1994
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11391/1064023
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