TiEMPO
Open-source time-dependent end-To-end model for simulating ground-based submillimeter astronomical observations
Esmee Huijten (Student TU Delft, ETH Zürich)
Yannick Roelvink (Student TU Delft)
Stefanie A. Brackenhoff (Rijksuniversiteit Groningen, Student TU Delft)
Stan Zaalberg (TU Delft - Mechanical Engineering)
Anne Kee Doing (Student TU Delft)
Jochem J.A. Baselmans (SRON–Netherlands Institute for Space Research, TU Delft - Electrical Engineering, Mathematics and Computer Science)
Kenichi Karatsu (SRON–Netherlands Institute for Space Research, TU Delft - Electrical Engineering, Mathematics and Computer Science)
Alejandro Pascual Laguna (TU Delft - Electrical Engineering, Mathematics and Computer Science, SRON–Netherlands Institute for Space Research)
Maarten Van Hoven (TU Delft - Electrical Engineering, Mathematics and Computer Science)
Akira Endo (TU Delft - Electrical Engineering, Mathematics and Computer Science)
undefined More Authors (External organisation)
More Info
expand_more
Other than for strictly personal use, it is not permitted to download, forward or distribute the text or part of it, without the consent of the author(s) and/or copyright holder(s), unless the work is under an open content license such as Creative Commons.
Abstract
The next technological breakthrough in millimeter–submillimeter astronomy is three-dimensional imaging spectrometry with wide instantaneous spectral bandwidths and wide fields of view. The total optimization of the focal-plane instrument, the telescope, the observing strategy, and the signal-processing software must enable efficient removal of foreground emission from the Earth’s atmosphere, which is time-dependent and highly nonlinear in frequency. Here, we present Time-dependent End-to-end Model for Post-process Optimization (TiEMPO) of the DEep Spectroscopic HIgh-redshift MApper (DESHIMA) spectrometer. TiEMPO utilizes a dynamical model of the atmosphere and parameterized models of the astronomical source, the telescope, the instrument, and the detector. The output of TiEMPO is a time stream of sky brightness temperature and detected power, which can be analyzed by standard signal-processing software. We first compare TiEMPO simulations with an on-sky measurement by the wideband DESHIMA spectrometer, and find good agreement in the noise and sensitivity. We then use TiEMPO to simulate the detection of the line emission spectrum of a high-redshift galaxy using the DESHIMA 2.0 spectrometer in development. The TiEMPO model is open source. Its modular and parametrized design enables users to adapt it to optimize the end-to-end performance of spectroscopic and photometric instruments on existing and future telescopes