Jason Soohoo
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View article: Correction to: Photogeologic Map of the Perseverance Rover Field Site in Jezero Crater Constructed by the Mars 2020 Science Team
Correction to: Photogeologic Map of the Perseverance Rover Field Site in Jezero Crater Constructed by the Mars 2020 Science Team Open
View article: First Frequency Phase Transfer from the 3 mm to the 1 mm Band on an Earth-sized Baseline
First Frequency Phase Transfer from the 3 mm to the 1 mm Band on an Earth-sized Baseline Open
Frequency phase transfer (FPT) is a technique designed to increase coherence and sensitivity in radio interferometry by making use of the nondispersive nature of the troposphere to calibrate high-frequency data using solutions derived at a…
View article: First frequency phase transfer from the 3 mm to the 1 mm band on an Earth-sized baseline
First frequency phase transfer from the 3 mm to the 1 mm band on an Earth-sized baseline Open
Frequency Phase Transfer (FPT) is a technique designed to increase coherence and sensitivity in radio interferometry by making use of the non-dispersive nature of the troposphere to calibrate high-frequency data using solutions derived at …
View article: Mars Oxygen ISRU Experiment (MOXIE)—Preparing for human Mars exploration
Mars Oxygen ISRU Experiment (MOXIE)—Preparing for human Mars exploration Open
MOXIE [Mars Oxygen In Situ Resource Utilization (ISRU) Experiment] is the first demonstration of ISRU on another planet, producing oxygen by solid oxide electrolysis of carbon dioxide in the martian atmosphere. A scaled-up MOXIE would cont…
View article: Photogeologic Map of the Perseverance Rover Field Site in Jezero Crater Constructed by the Mars 2020 Science Team
Photogeologic Map of the Perseverance Rover Field Site in Jezero Crater Constructed by the Mars 2020 Science Team Open
View article: A VLBI receiving system for the South Pole Telescope
A VLBI receiving system for the South Pole Telescope Open
The Event Horizon Telescope (EHT) is a very-long-baseline interferometry (VLBI) experiment that aims to observe supermassive black holes with an angular resolution that is comparable to the event horizon scale. The South Pole occupies an i…
View article: A VLBI receiving system for the South Pole Telescope
A VLBI receiving system for the South Pole Telescope Open
The Event Horizon Telescope (EHT) is a very-long-baseline interferometry (VLBI) experiment that aims to observe supermassive black holes with an angular resolution that is comparable to the event horizon scale. The South Pole occupies an i…
View article: PERSISTENT ASYMMETRIC STRUCTURE OF SAGITTARIUS A* ON EVENT HORIZON SCALES
PERSISTENT ASYMMETRIC STRUCTURE OF SAGITTARIUS A* ON EVENT HORIZON SCALES Open
The Galactic Center black hole Sagittarius A* (Sgr A*) is a prime observing target for the Event Horizon Telescope (EHT), which can resolve the 1.3 mm emission from this source on angular scales comparable to that of the general relativist…
View article: VLBI at APEX: First fringes
VLBI at APEX: First fringes Open
We have equipped the APEX telescope for 1 mm VLBI and obtained first fringes on 3C 279 at 229 GHz in May 2012 with SMA (Hawaii) and SMTO (Arizona).The fringe spacing achieved was 29 microarcseconds, adequate to directly observe strong-fiel…
View article: Resolved magnetic-field structure and variability near the event horizon of Sagittarius A*
Resolved magnetic-field structure and variability near the event horizon of Sagittarius A* Open
Magnetic fields near the event horizon Astronomers have long sought to examine a black hole's event horizon—the boundary around the black hole within which nothing can escape. Johnson et al. used sophisticated interferometry techniques to …
View article: 230 GHz VLBI OBSERVATIONS OF M87: EVENT‐HORIZON‐SCALE STRUCTURE DURING AN ENHANCED VERY‐HIGH‐ENERGY $\gamma $‐RAY STATE IN 2012
230 GHz VLBI OBSERVATIONS OF M87: EVENT‐HORIZON‐SCALE STRUCTURE DURING AN ENHANCED VERY‐HIGH‐ENERGY $\gamma $‐RAY STATE IN 2012 Open
We report on 230 GHz (1.3 mm) VLBI observations of M87 with the Event Horizon\nTelescope using antennas on Mauna Kea in Hawaii, Mt. Graham in Arizona and\nCedar Flat in California. For the first time, we have acquired 230 GHz VLBI\ninterfe…
View article: First 230 GHz VLBI fringes on 3C 279 using the APEX Telescope
First 230 GHz VLBI fringes on 3C 279 using the APEX Telescope Open
Aims. We report about a 230? GHz very long baseline interferometry (VLBI) fringe finder observation of blazar 3C 279 with the APEX telescope in Chile, the phased submillimeter array (SMA), and the SMT of the Arizona Radio Observatory (ARO)…