2.3k citations · 35.8k across the 352 of their papers we have counts for
23 papers · 1 filter
Asteroid collisions: expected visibility and rate
E. O. Ofek, D. Polishook, D. Kushnir +9
Asteroid collisions are one of the main processes responsible for the evolution of bodies in the main belt. Using observations of the Dimorphos impact by the DART spacecraft, we es…
UV to near-IR observations of the DART-Dimorphos collision
E. O. Ofek, D. Kushnir, D. Polishook +15
The impact of the Double Asteroid Redirection Test (DART) spacecraft with Dimorphos allows us to study asteroid collision physics, including momentum transfer, the ejecta propertie…
OGLE-2016-BLG-1195 AO: Lens, Companion to Lens or Source, or None of the Above?
Andrew Gould, Yossi Shvartzvald, Jiyuan Zhang +4
We systematically investigate the claim by Vandorou et al. (2023) to have detected the host star of the low mass-ratio () microlensing planet OGLE-2016-BLG-1195Lb, via K…
A search for Kuiper Belt occultations using the Weizmann Fast Astronomical Survey Telescope
Guy Nir, Eran O. Ofek, David Polishook +2
Measuring the size distribution of small (km-scale) KBOs can help constrain models of Solar System formation and planetary migration. Such small, distant bodies are hard to detect…
Astrometric detection of binary asteroids
Noam Segev, Eran O. Ofek, David Polishook
Binary asteroids probe thermal-radiation effects on the main-belt asteroids' evolution. We discuss the possibility of detecting binary minor planet systems by the astrometric wobbl…
Physical properties of the trans-Neptunian object (38628) Huya from a multi-chord stellar occultation
P. Santos-Sanz, J. L. Ortiz, B. Sicardy +85
Within our international program to obtain accurate physical properties of trans-Neptunian objects (TNOs) we predicted a stellar occultation by the TNO (38628) Huya of the star Gai…
Study of the plutino object (208996) 2003 AZ84 from stellar occultations: size, shape and topographic features
A. Dias-Oliveira, B. Sicardy, J. L. Ortiz +60
We present results derived from four stellar occultations by the plutino object (208996) 2003~AZ, detected at January 8, 2011 (single-chord event), February 3, 2012 (multi-c…
The First Circumbinary Planet Found by Microlensing: OGLE-2007-BLG-349L(AB)c
D. P. Bennett, S. H. Rhie, A. Udalski +79
We present the analysis of the first circumbinary planet microlensing event, OGLE-2007-BLG-349. This event has a strong planetary signal that is best fit with a mass ratio of $q \a…
Asteroids in GALEX: Near-ultraviolet photometry of the major taxonomic groups
Adam Waszczak, Eran O. Ofek, Shrinivas R. Kulkarni
We present ultraviolet photometry (NUV band, 180--280 nm) of 405 asteroids observed serendipitously by the Galaxy Evolution Explorer (GALEX) from 2003--2012. All asteroids in this…
Asteroid lightcurves from the Palomar Transient Factory survey: Rotation periods and phase functions from sparse photometry
Adam Waszczak, Chan-Kao Chang, Eran O. Ofek +10
We fit 54,296 sparsely-sampled asteroid lightcurves in the Palomar Transient Factory to a combined rotation plus phase-function model. Each lightcurve consists of 20+ observations…
Reanalyses of Anomalous Gravitational Microlensing Events in the OGLE-III Early Warning System Database with Combined Data
J. Jeong, H. Park, C. Han +95
We reanalyze microlensing events in the published list of anomalous events that were observed from the OGLE lensing survey conducted during 2004-2008 period. In order to check the…
MOA-2010-BLG-328Lb: a sub-Neptune orbiting very late M dwarf ?
K. Furusawa, A. Udalski, T. Sumi +119
We analyze the planetary microlensing event MOA-2010-BLG-328. The best fit yields host and planetary masses of Mh = 0.11+/-0.01 M_{sun} and Mp = 9.2+/-2.2M_Earth, corresponding to…
Main-belt comets in the Palomar Transient Factory survey: I. The search for extendedness
Adam Waszczak, Eran O. Ofek, Oded Aharonson +7
Cometary activity in main-belt asteroids probes the ice content of these objects and provides clues to the history of volatiles in the inner solar system. We search the Palomar Tra…
Measuring the Abundance of sub-kilometer sized Kuiper Belt Objects using Stellar Occultations
Hilke E. Schlichting, Eran O. Ofek, Re'em Sari +6
We present here the analysis of about 19,500 new star hours of low ecliptic latitude observations (|b| < 20 deg) obtained by the Hubble Space Telescope's FGS over a time span of mo…
The PTF Orion Project: a Possible Planet Transiting a T-Tauri Star
Julian C. van Eyken, David R. Ciardi, Kaspar von Braun +35
We report observations of a possible young transiting planet orbiting a previously known weak-lined T-Tauri star in the 7-10 Myr old Orion-OB1a/25-Ori region. The candidate was fou…
SDSS Observations of Kuiper Belt Objects: Colors and Variability
Eran O. Ofek
Colors of Trans Neptunian Objects (TNOs) are used to study the evolutionary processes of bodies in the outskirts of the Solar System, and to test theories regarding their origin. H…
Asteroid rotation periods from the Palomar Transient Factory survey
D. Polishook, E. O. Ofek, A. Waszczak +17
The Palomar Transient Factory (PTF) is a synoptic survey designed to explore the transient and variable sky in a wide variety of cadences. We use PTF observations of fields that we…
MOA-2011-BLG-293Lb: A test of pure survey microlensing planet detections
J. C. Yee, Y. Shvartzvald, A. Gal-Yam +10
Because of the development of large-format, wide-field cameras, microlensing surveys are now able to monitor millions of stars with sufficient cadence to detect planets. These new…
MOA-2009-BLG-387Lb: A massive planet orbiting an M dwarf
Virginie Batista, A. Gould, S. Dieters +25
We report the discovery of a planet with a high planet-to-star mass ratio in the microlensing event MOA-2009-BLG-387, which exhibited pronounced deviations over a 12-day interval,…
A sub-Saturn Mass Planet, MOA-2009-BLG-319Lb
N. Miyake, T. Sumi, Subo Dong +119
We report the gravitational microlensing discovery of a sub-Saturn mass planet, MOA-2009-BLG-319Lb, orbiting a K or M-dwarf star in the inner Galactic disk or Galactic bulge. The h…
A single sub-km Kuiper Belt object from a stellar Occultation in archival data
H. E. Schlichting, E. O. Ofek, M. Wenz +5
The Kuiper belt is a remnant of the primordial Solar System. Measurements of its size distribution constrain its accretion and collisional history, and the importance of material s…
Detectability of Oort cloud objects using Kepler
Eran O. Ofek, Ehud Nakar
The size distribution and total mass of objects in the Oort Cloud have important implications to the theory of planets formation, including the properties of, and the processes tak…
Mass measurement of a single unseen star and planetary detection efficiency for OGLE 2007-BLG-050
V. Batista, Subo Dong, A. Gould +93
We analyze OGLE-2007-BLG-050, a high magnification microlensing event (A ~ 432) whose peak occurred on 2 May, 2007, with pronounced finite-source and parallax effects. We compute p…