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Black Hole Explorer Mission Development in Japan
Kazunori Akiyama, Mareki Honma, Akihiro Doi +21
The Black Hole Explorer (BHEX) is a next-generation space very-long-baseline interferometry (VLBI) mission concept that will extend existing ground-based millimeter/submillimeter V…
TIME Commissioning Observations: II. On-sky Characterization and the 2D Map Data Processing Pipeline
Benjamin J. Vaughan, Abigail T. Crites, Dongwoo T. Chung +24
The Tomographic Ionized-carbon Mapping Experiment (TIME) is a line intensity mapping (LIM) instrument that is designed to observe the power spectrum of the [CII] ~m emissio…
A Novel Comb Generator for Frequency Phase Transfer
Gabriella Montano, Cheukyu Edward Tong, Dan Marrone
This paper presents the design and testing of a millimeter-wave frequency comb generator developed for the Black Hole Explorer (BHEX) mission, a space Very-Long-Baseline Interferom…
A Direct Calibration Algorithm for ADC Interleaving
Chi-kwan Chan, Hina Suzuki, David Forbes +4
We introduce a novel direct calibration algorithm to address phase delay, gain, and offset mismatches in Analog-to-Digital Converter (ADC) time interleaving systems. These mismatch…
TIME Commissioning Observations: I. Mapping Dust and Molecular Gas in the Sgr A Molecular Cloud Complex at the Galactic Center
Selina F. Yang, Sophie M. McAtee, Benjamin J. Vaughan +24
We present the processing of an observation of Sagittarius A (Sgr A) with the Tomographic Ionized-carbon Mapping Experiment (TIME), part of the 2021-2022 commissioning run to verif…
Development of a planar cable-driven parallel robot for submillimeter and terahertz beam mapping measurements
Evan C. Mayer, Ian N. Lowe, Daniel P. Marrone +20
The spatial sensitivity pattern of millimeter-wavelength receivers is an important diagnostic of performance and is affected by the alignment of coupling optics. Characterization c…
An On-Sky Atmospheric Calibration of SPT-SLIM
K. R. Dibert, M. Adamic, A. J. Anderson +26
We present the methodology and results of the on-sky responsivity calibration of the South Pole Telescope Shirokoff Line Intensity Mapper (SPT-SLIM). SPT-SLIM is a pathfinder line…
Design and Performance of the SPT-SLIM Receiver Cryostat
M. R. Young, M. Adamic, A. J. Anderson +28
The South Pole Telescope Shirokoff Line Intensity Mapper (SPT-SLIM) is a millimeter-wavelength line-intensity mapping experiment, which was deployed on the South Pole Telescope (SP…
Dual Band Receiver Design for the Black Hole Explorer (BHEX) Mission
Cheukyu Edward Tong, Keara Carter, Paul Grimes +6
A dual band receiver has been designed for the Black Hole Explorer (BHEX) mission, which is a space Very-Long Baseline Interferometry (VLBI) mission concept, aimed at unveiling the…
TES Bolometer Design and Testing for the Tomographic Ionized-carbon Mapping Experiment Millimeter Array
Victoria L. Butler, James J. Bock, Dongwoo T. Chung +7
Transition Edge Sensor (TES) bolometers are a well-established technology with a strong track record in experimental cosmology, making them ideal for current and future radio astro…
Spectral characterization and performance of SPT-SLIM on-chip filterbank spectrometers
C. S. Benson, K. Fichman, M. Adamic +26
The South Pole Telescope Shirokoff Line Intensity Mapper (SPT-SLIM) experiment is a pathfinder for demonstrating the use of on-chip spectrometers for millimeter (mm) Line Intensity…
Antenna Technology Readiness for the Black Hole Explorer (BHEX) Mission
T. K. Sridharan, R. Lehmensiek, S. Schwarz +1
The Black Hole Explorer (BHEX) will be the first sub-mm wavelength Space Very-Long-Baseline Interferometry (VLBI) mission. It targets astronomical imaging with the highest ever spa…
Pointing Accuracy Improvements for the South Pole Telescope with Machine Learning
P. M. Chichura, A. Rahlin, A. J. Anderson +93
We present improvements to the pointing accuracy of the South Pole Telescope (SPT) using machine learning. The ability of the SPT to point accurately at the sky is limited by its s…
First Very Long Baseline Interferometry Detections at 870μm
Alexander W. Raymond, Sheperd S. Doeleman, Keiichi Asada +276
The first very long baseline interferometry (VLBI) detections at 870m wavelength (345GHz frequency) are reported, achieving the highest diffraction-limited angular resolutio…
Cosmic ray susceptibility of the Terahertz Intensity Mapper detector arrays
Lun-Jun Liu, Reinier M. J. Janssen, Bruce Bumble +26
We report on the effects of cosmic ray interactions with the Kinetic Inductance Detector (KID) based focal plane array for the Terahertz Intensity Mapper (TIM). TIM is a NASA-funde…
The Black Hole Explorer: Preliminary Antenna Design
T. K. Sridharan, R. Lehmensiek, D. Marrone +6
We present the basic design of a large, light weight, spaceborne antenna for the Black Hole Explorer (BHEX) space Very Long Baseline Interferometry (space-VLBI) mission, achieving…
The Black Hole Explorer: Instrument System Overview
Daniel P. Marrone, Janice Houston, Kazunori Akiyama +14
The Black Hole Explorer (BHEX) is a space very-long-baseline interferometry (VLBI) mission concept that is currently under development. BHEX will study supermassive black holes at…
The Black Hole Explorer: Back End Electronics
Ranjani Srinivasan, Jonathan Weintroub, Rick Raffanti +15
This paper describes specification and early design of back end signal processing subsystems for the Black Hole Explorer (BHEX) Very Long Baseline Interferometry (VLBI) space teles…
The Black Hole Explorer Cryocooling Instrument
Hannah Rana, Kazunori Akiyama, Edgar Canavan +10
The Black Hole Explorer (BHEX) is a space-based very-long baseline interferometry (VLBI) mission aimed at precision black hole measurements, detecting the photon ring around black…
The Black Hole Explorer: Motivation and Vision
Michael D. Johnson, Kazunori Akiyama, Rebecca Baturin +65
We present the Black Hole Explorer (BHEX), a mission that will produce the sharpest images in the history of astronomy by extending submillimeter Very-Long-Baseline Interferometry…
The Black Hole Explorer: Operating a Hybrid Observatory
Sara Issaoun, Kim Alonso, Kazunori Akiyama +16
We present a baseline science operations plan for the Black Hole Explorer (BHEX), a space mission concept aiming to confirm the existence of the predicted sharp ``photon ring" resu…
High Data Rate Laser Communications for the Black Hole Explorer
Jade Wang, Bryan Bilyeu, Don Boroson +14
The Black Hole Explorer (BHEX) is a mission concept that can dramatically improve state-of-the-art astronomical very long baseline interferometry (VLBI) imaging resolution by exten…
Receivers for the Black Hole Explorer (BHEX) Mission
C. Edward Tong, Kazunori Akiyama, Paul Grimes +6
In this paper, we introduce the receiver architecture for the Black Hole Explorer (BHEX) Mission, designed to reveal the photon ring of black holes. The primary instrument is a dua…
High-Redshift Extragalactic Science with the Single Aperture Large Telescope for Universe Studies (SALTUS) Space Observatory
Justin Spilker, Rebecca C. Levy, Daniel Marrone +10
This paper presents an overview of the high-redshift extragalactic science case for the Single Aperture Large Telescope for Universe Studies (SALTUS) far-infrared NASA probe-class…