DESHIMA on ASTE: on-sky performance and upgrade to ultra wideband [VIDEO]
A. Endo (TU Delft - Tera-Hertz Sensing)
Kenichi Karatsu (TU Delft - Tera-Hertz Sensing)
T. Takekoshi (TU Delft - Team Tamas Keviczky)
S. Bosma (Student TU Delft)
B. Buijtendorp (TU Delft - Tera-Hertz Sensing)
Esmee Huijten (Student TU Delft)
Soh Ikarashi (Durham University)
Teunis M. Klapwijk (TU Delft - QN/Afdelingsbureau)
Nuria Llombart Llombart (TU Delft - Tera-Hertz Sensing)
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Abstract
The integrated superconducting spectrometer (ISS) enables ultra-wideband, large field-of-view integral-field-spectrometer designs for mm-submm wave astronomy. DESHIMA 2.0 is a single-pixel ISS spectrometer for the ASTE 10-m telescope, designed to observe the 220-440 GHz band in a single shot, corresponding to a [CII] redshift range of z=3.3-7.6. The first-light experiment of DESHIMA, using a 332-377 GHz configuration has shown excellent consistency between the performance derived from on-sky measurements, lab-measurements and the design. Ongoing upgrades towards the octave-bandwidth full system include the development of a filterbank chip with ~350 channels and higher optical efficiency, a wideband quasioptical design, and observing methods for efficiently removing the atmosphere.
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