BLISS for SPICA: far-IR spectroscopy at the background limit

C. M. Bradford

doi:10.1117/12.672544

13 June 2006 BLISS for SPICA: far-IR spectroscopy at the background limit

C. M. Bradford

Proceedings Volume 6265, Space Telescopes and Instrumentation I: Optical, Infrared, and Millimeter; 62650U (2006) https://doi.org/10.1117/12.672544
Event: SPIE Astronomical Telescopes + Instrumentation, 2006, Orlando, Florida , United States

Abstract

We present concepts for the background-limited infrared-submillimeter spectrograph (BLISS) for the Japanese SPICA mission to launch early next decade. SPICA will be a 3.5-meter telescope cooled to below 5 K, and offers the potential for far-IR observations limited only by the zodiacal dust emission. BLISS will provide moderate-resolution (R 1000) spectroscopy at this background limit throughout the 40-600 μm band. With sensitivities below 10^-20Wm² in modest integrations, BLISS-SPICA will enable the first survey spectroscopy of the redshift 0.5 to 5 galaxies which produce the far-IR background. Both WaFIRS waveguide grating spectrometers, and new compact cross-dispersed echelle grating designs are under consideration. Detectors must have sensitivities around 3x10^-20 W/√Hz and have good efficiency. The most promising near-term approaches to cover the full band are transition-edge bolometers cooled to ~50 mK with an adiabatic demagnetization refrigerator.

Citation Download Citation

C. M. Bradford "BLISS for SPICA: far-IR spectroscopy at the background limit", Proc. SPIE 6265, Space Telescopes and Instrumentation I: Optical, Infrared, and Millimeter, 62650U (13 June 2006); https://doi.org/10.1117/12.672544

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