Speaker
Description
We present initial on-sky observation data from superconducting mm-wave filter bank spectrometers on the South Pole Telescope Shirokoff Line Intensity Mapper (SPT-SLIM). The SPT-SLIM experiment is designed to measure redshifted carbon monoxide (CO) line emission from galaxies at 0.5 < z < 2. It was first deployed during the 2024-2025 Antarctic summer for a commissioning and two-week observing campaign on the South Pole Telescope, a high-resolution platform for mm-wave observations. The on-chip spectrometer filter bank couples a superconducting microstrip bank of narrowband filters from 120-180 GHz to an array of microwave kinetic inductance detectors (MKIDs) for a compact design intended to scale to large-scale line-intensity mapping (LIM) experiments. We discuss the detector design, laboratory characterization, and preliminary performance from this initial campaign, and discuss prospects for future LIM observations with the compact filter bank spectrometer technique.
