Description
We present spectral mapping observations of DESHIMA 2.0 at the 10-meter ASTE telescope in Chile, obtained as part of its commissioning and science verification (CSV) campaign during 2024. DESHIMA 2.0 is an on-chip spectrometer operating between 200-400 GHz with a moderate filterbank resolution of R ~ 500, which is achieved using a superconducting filterbank coupled to an array of microwave kinetic inductance detectors (MKIDs). It is a successor and a significant upgrade to the DESHIMA spectrometer, which saw first light at ASTE in 2017. The science cases for DESHIMA 2.0 range from spectroscopic redshift measurements of dusty-star forming galaxies, to galaxy cluster observations through the Sunyaev-Zel’dovich effect.
During the CSV campaign, multiple known (extra-)galactic objects have been spectrally mapped, such as a galaxy cluster, active galactic nuclei, nearby galaxies, asymptotic giant branch stars, galactic star forming regions, and solar system planets. The purpose of these mapping observations include astronomical science observations, optical system stability and beam pattern measurements, performance verification, and flux calibration, among others.
In this contribution, we start by introducing DESHIMA 2.0 at ASTE. Then, we present the mapping strategies used and the data reduction pipeline. In particular, we will focus on our efforts to mitigate effects from the atmosphere and two-level system noise, which appear as temporally correlated noise in the time-ordered data for each MKID. Then, we present maps and spectra of the flux calibrator sources and the analysis results, highlighting the advantage of the large instantaneous bandwidth of DESHIMA 2.0. Finally, we present the state of the galaxy cluster observations and provide a future outlook of the planned analysis.
| Talk category | Splinter 1: Large Infrastructure and instrumentation |
|---|---|
| Second preference | NOVA Network 1 |
| PhD relevance | 4th |
