We describe the design and calibration of the Far-Infrared Photometer (FIRP), one of four focal plane instruments on the Infrared Telescope in Space (IRTS). The FIRP will provide absolute photometry in four bands centered at 150, 250, 400, and 700 micrometers with spectral resolution lambda/(Delta lambda) approx. = 3 and spatial resolution Delta theta = 0.5 degrees. High sensitivity is achieved by using bolometric detectors operated at 300 mK in an AC bridge circuit. The closed-cycle He-3 refrigerator can be recycled in orbit. A 2 K shutter provides a zero reference for each field of view. More than 10% of the sky will be surveyed during the approximately 3 week mission lifetime with a sensitivity of less than 10(exp -13) W/((sq cm)(sr)) per 0.5 degree pixel.


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    Title :

    A Far Infrared Photometer (FIRP) for the infrared telescope in space (IRTS)


    Contributors:
    Freund, M. M. (author) / Hirao, T. (author) / Matsumoto, T. (author) / Sato, S. (author) / Watabe, T. (author) / Brubaker, G. K. (author) / Duband, L. (author) / Grossman, B. (author) / Larkin, N. (author) / Lumetta, S. (author)

    Published in:

    Publication date :

    1993-12-01



    Type of media :

    Miscellaneous


    Type of material :

    No indication


    Language :

    English


    Keywords :



    A Far Infrared Photometer (FIRP) for the Infrared telescope in Space (IRTS)

    Freund, M. M. / Hirao, T. / Matsumoto, T. et al. | British Library Conference Proceedings | 1993


    A Far Infrared Photometer (FIRP) for the Infrared Telescope in Space (IRTS)

    Freund, M.M. / Hirao, T. / Matsumoto, T. et al. | Elsevier | 1993


    Infrared telescope in space — IRTS

    Hayakawa, S. | Elsevier | 1983


    Development of the Infrared Telescope in Space: IRTS

    Matsumoto, T. / COSPAR | British Library Conference Proceedings | 1993