Simulated Extragalactic Observations with a Cryogenic Imaging Spectrophotometer

Details Simulated Extragalactic Observations with a Cryogenic Imaging Spectrophotometer Simulated Extragalactic Observations with a Cryogenic Imaging Spectrophotometer

2000-07-27

arxiv.org/abs/astro-ph/0007420v1

Astronomy and Astrophysics

Astrophysics

30 pages, 10 figures, accepted for publication in the Astronomical Journal

Scientific paper

10.1086/316812

In this paper we explore the application of cryogenic imaging spectrophotometers. Prototypes of this new class of detector, such as superconducting tunnel junctions (STJs) and transition edge sensors (TESs), currently deliver low resolution imaging spectrophotometry with high quantum efficiency (70-100%) and no read noise over a wide bandpass in the visible to near-infrared. In order to demonstrate their utility and the differences in observing strategy needed to maximize their scientific return, we present simulated observations of a deep extragalactic field. Using a simple analytic technique, we can estimate both the galaxy redshift and spectral type more accurately than is possible with current broadband techniques. From our simulated observations and a subsequent discussion of the expected migration path for this new technology, we illustrate the power and promise of these devices.

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