235 citations · 4.7k across the 242 of their papers we have counts for
20 papers · 1 filter
The Large Array Survey Telescope-Pipeline. II. Image Subtraction and Transient Detection
R. Konno, E. O. Ofek, A. Krassilchtchikov +16
Context. The Large Array Survey Telescope (LAST) is a wide-field visual-band survey designed to explore the variable and transient sky with high cadence. Its raw data stream is aut…
Four binary microlenses with directly measured masses
Cheongho Han, Andrzej Udalski, Chung-Uk Lee +58
We investigated binary lens events from the 2022-2024 microlensing surveys, aiming to identify events suitable for lens mass measurements. We focused on two key light curve feature…
Towards sub-milliarcsecond astrometric precision using seeing-limited imaging
Noam Segev, Eran O. Ofek, Yossi Shvartzvald +21
The Earth's atmospheric turbulence degrades the precision of ground-based astrometry. Here, we discuss these limitations and propose that, with proper treatment of systematics and…
LensNet: Enhancing Real-time Microlensing Event Discovery with Recurrent Neural Networks in the Korea Microlensing Telescope Network
Javier Viaña, Kyu-Ha Hwang, Zoë de Beurs +20
Traditional microlensing event vetting methods require highly trained human experts, and the process is both complex and time-consuming. This reliance on manual inspection often le…
Accurate photometric calibration by fitting the system transmission
S. Garrappa, E. O. Ofek, S. Ben-Ami +10
Transforming the instrumental photometry of ground-based telescopes into a calibrated physical flux in a well-defined passband is a major challenge in astronomy. Along with the int…
Observations of Microlensed Images with Dual-field Interferometry: On-sky Demonstration and Prospects
P. Mroz, S. Dong, A. Merand +57
Interferometric observations of gravitational microlensing events offer an opportunity for precise, efficient, and direct mass and distance measurements of lensing objects, especia…
Preliminary results of the Single Event Effect testing for the ULTRASAT sensors
Vlad Dumitru Berlea, Arooj Asif, Merlin F. Barschke +18
ULTRASAT (ULtra-violet TRansient Astronomy SATellite) is a wide-angle space telescope that will perform a deep time-resolved all-sky survey in the near-ultraviolet (NUV) spectrum.…
The Large Array Survey Telescope -- Pipeline. I. Basic image reduction and visit coaddition
E. O. Ofek, Y. Shvartzvald, A. Sharon +18
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 tel…
ULTRASAT: A wide-field time-domain UV space telescope
Y. Shvartzvald, E. Waxman, A. Gal-Yam +41
The Ultraviolet Transient Astronomy Satellite (ULTRASAT) is scheduled to be launched to geostationary orbit in 2026. It will carry a telescope with an unprecedentedly large field o…
The Large Array Survey Telescope -- System Overview and Performances
E. O. Ofek, S. Ben-Ami, D. Polishook +38
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…
The Large Array Survey Telescope -- Science Goals
S. Ben-Ami, E. O. Ofek, D. Polishook +20
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 27.9cm apert…
The scientific payload of the Ultraviolet Transient Astronomy Satellite (ULTRASAT)
Sagi Ben-Ami, Yossi Shvartzvald, Eli Waxman +45
The Ultraviolet Transient Astronomy Satellite (ULTRASAT) is a space-borne near UV telescope with an unprecedented large field of view (200 sq. deg.). The mission, led by the Weizma…
ET White Paper: To Find the First Earth 2.0
Jian Ge, Hui Zhang, Weicheng Zang +163
We propose to develop a wide-field and ultra-high-precision photometric survey mission, temporarily named "Earth 2.0 (ET)". This mission is designed to measure, for the first time,…
Sensor characterization for the ULTRASAT space telescope
Benjamin Bastian-Querner, Nirmal Kaipachery, Daniel Küsters +31
The Ultraviolet Transient Astronomical Satellite is a scientific space mission carrying an astronomical telescope. The mission is led by the Weizmann Institute of Science in Israel…
Design of the ULTRASAT UV camera
Arooj Asif, Merlin Barschke, Benjamin Bastian-Querner +34
The Ultraviolet Transient Astronomical Satellite (ULTRASAT) is a scientific UV space telescope that will operate in geostationary orbit. The mission, targeted to launch in 2024, is…
Spitzer + VLTI-GRAVITY Measure the Lens Mass of a Nearby Microlensing Event
Weicheng Zang, Subo Dong, Andrew Gould +24
We report the lens mass and distance measurements of the nearby microlensing event TCP J05074264+2447555. We measure the microlens parallax vector using Spitzer and gro…
Opportunities for Astrophysical Science from the Inner and Outer Solar System
Michael Zemcov, Iair Arcavi, Richard G. Arendt +22
Astrophysical measurements away from the 1 AU orbit of Earth can enable several astrophysical science cases that are challenging or impossible to perform from Earthbound platforms,…
The Wide Field Infrared Survey Telescope: 100 Hubbles for the 2020s
Rachel Akeson, Lee Armus, Etienne Bachelet +103
The Wide Field Infrared Survey Telescope (WFIRST) is a 2.4m space telescope with a 0.281 deg^2 field of view for near-IR imaging and slitless spectroscopy and a coronagraph designe…
Unique Science from a Coordinated LSST-WFIRST Survey of the Galactic Bulge
R. A. Street, M. B. Lund, M. Donachie +19
NASA's WFIRST mission will perform a wide-field, NIR survey of the Galactic Bulge to search for exoplanets via the microlensing techniques. As the mission is due to launch in the m…
The Korea Microlensing Telescope Network (KMTNet) Alert Algorithm and Alert System
Hyoun-Woo Kim, Kyu-Ha Hwang, Yossi Shvartzvald +17
We describe a new microlensing-event alert algorithm that is tailored to the Korea Microlensing Telescope Network (KMTNet) multi-observatory system. The algorithm focuses on detect…