Search Publications
Rubin Observatory LSST Transients and Variable Stars Roadmap
Hartigan, Patrick; Buckley, David; Davenport, James R. A. +79 more
The Vera C. Rubin Legacy Survey of Space and Time (LSST) holds the potential to revolutionize time domain astrophysics, reaching completely unexplored areas of the Universe and mapping variability time scales from minutes to a decade. To prepare to maximize the potential of the Rubin LSST data for the exploration of the transient and variable Univ…
The Large Array Survey Telescope-System Overview and Performances
Gal-Yam, A.; Kowalski, M.; Sadeh, I. +38 more
The Large Array Survey Telescope (LAST) is a wide-field visible-light telescope array designed to explore the variable and transient sky with a high cadence. LAST will be composed of 48, 28 cm f/2.2 telescopes (32 already installed) equipped with full-frame backside-illuminated cooled CMOS detectors. Each telescope provides a field of view (FoV) o…
The SNAD Viewer: Everything You Want to Know about Your Favorite ZTF Object
Ishida, Emille E. O.; Krone-Martins, Alberto; Volnova, Alina A. +9 more
We describe the SNAD Viewer, a web portal for astronomers which presents a centralized view of individual objects from the Zwicky Transient Facility's (ZTF) data releases, including data gathered from multiple publicly available astronomical archives and data sources. Initially built to enable efficient expert feedback in the context of adaptive m…
The Large Array Survey Telescope-Science Goals
Gal-Yam, A.; Rybicki, K.; Sadeh, I. +21 more
The Large Array Survey Telescope (LAST) is designed to survey the variable and transient sky at high temporal cadence. The array is comprised of 48 F/2.2 telescopes of 27.9 cm aperture, coupled to full-frame backside-illuminated cooled CMOS detectors with 3.76 µm pixels, resulting in a pixel scale of 1.″25. A single telescope with a field of…
Introducing the Condor Array Telescope. I. Motivation, Configuration, and Performance
Walter, Frederick M.; Shara, Michael M.; Lanzetta, Kenneth M. +4 more
The "Condor Array Telescope" or "Condor" is a high-performance "array telescope" comprised of six apochromatic refracting telescopes of objective diameter 180 mm, each equipped with a large-format, very low-read-noise (≈1.2 e-), very rapid-read-time (<1 s) CMOS camera. Condor is located at a very dark astronomical site in the southwe…
A Study of Twelve Potential Merger Candidate Contact Binary Systems
Filipović, Miroslav D.; Wadhwa, Surjit S.; Tothill, Nick F. H. +4 more
Photometric observations and analysis of twelve previously poorly studied contact binary systems is presented. All show total eclipses and have extremely low mass ratios ranging from 0.072 to 0.15. Also, all show characteristics of orbital instability with mass ratios within the theoretical orbital instability range. Although none demonstrate a si…
The TEMPO Survey. I. Predicting Yields of Transiting Exosatellites, Moons, and Planets from a 30 days Survey of Orion with the Roman Space Telescope
Vanderburg, Andrew; Heller, René; Kounkel, Marina +12 more
We present design considerations for the Transiting Exosatellites, Moons, and Planets in Orion (TEMPO) Survey with the Nancy Grace Roman Space Telescope. This proposed 30 days survey is designed to detect a population of transiting extrasolar satellites, moons, and planets in the Orion Nebula Cluster (ONC). The young (1-3 Myr), densely populated O…
The Large Array Survey Telescope-Pipeline. I. Basic Image Reduction and Visit Coaddition
Fallah Ramazani, V.; Ofek, E. O.; Ben-Ami, S. +18 more
The Large Array Survey Telescope (LAST) is a wide-field telescope designed to explore the variable and transient sky with a high cadence and to be a test-bed for cost-effective telescope design. A LAST node is composed of 48 (32 already deployed), 28 cm f/2.2 telescopes. A single telescope has a 7.4 deg2 field of view and reaches a 5σ l…
Reaching Submillisecond Accuracy in Stellar Occultations and Artificial Satellite Tracking
Kamiński, K.; Marciniak, A.; Weber, C. +2 more
In recent years, there appeared a need for astronomical observations timed with submillisecond accuracy. These include, e.g., timing stellar occultations by small, subkilometer, or fast near-Earth asteroids and tracking artificial satellites in low-Earth orbit using optical sensors. Precise astrometry of fast-moving satellites and accurate timing …
Applied Machine-Learning Models to Identify Spectral Sub-Types of M Dwarfs from Photometric Surveys
Sithajan, Sirinrat; Meethong, Sukanya
M dwarfs are the most abundant stars in the Solar Neighborhood and they are prime targets for searching for rocky planets in habitable zones. Consequently, a detailed characterization of these stars is in demand. The spectral sub-type is one of the parameters that is used for the characterization and it is traditionally derived from the observed s…