2.3k citations · 35.8k across the 352 of their papers we have counts for
15 papers · 1 filter
Spitzer Mid-Infrared Detections of Neutron Star Merger GW170817 Suggests Synthesis of the Heaviest Elements
Mansi M. Kasliwal, Daniel Kasen, Ryan M. Lau +8
We report our Spitzer Space Telescope observations and detections of the binary neutron star merger GW170817. At 4.5um, GW170817 is detected at 21.9 mag AB at +43 days and 23.9 mag…
Faint, high proper motion star candidates selected from the SDSS and PS1 catalogs
Noam Segev, Eran O. Ofek
High proper motion stars probe several extreme stellar populations, including nearby objects, Galactic halo stars, and hyper-velocity stars. Extending the search for high proper mo…
R-band light-curve properties of Type Ia supernovae from the (intermediate) Palomar Transient Factory
S. Papadogiannakis, A. Goobar, R. Amanullah +15
We present the best 265 sampled R-band light curves of spectroscopically identified Type Ia supernovae (SNe) from the Palomar Transient Factory (PTF; 2009-2012) survey and the inte…
A hot and fast ultra-stripped supernova that likely formed a compact neutron star binary
K. De, M. M. Kasliwal, E. O. Ofek +24
Compact neutron star binary systems are produced from binary massive stars through stellar evolution involving up to two supernova explosions. The final stages in the formation of…
A possible advantage of telescopes with a non-circular pupil
Guy Nir, Barak Zackay, Eran O. Ofek
Most telescope designs have a circular-shape aperture. We demonstrate that telescopes with an elongated pupil have better contrast, at lower separations, between a bright central s…
The first tidal disruption flare in ZTF: from photometric selection to multi-wavelength characterization
Sjoert van Velzen, Suvi Gezari, S. Bradley Cenko +37
We present Zwicky Transient Facility (ZTF) observations of the tidal disruption flare AT2018zr/PS18kh reported by Holoien et al. and detected during ZTF commissioning. The ZTF ligh…
Discovery of the Luminous, Decades-Long, Extragalactic Radio Transient FIRST J141918.9+394036
C. J. Law, B. M. Gaensler, B. D. Metzger +2
We present the discovery of a slowly-evolving, extragalactic radio transient, FIRST J141918.9+394036, identified by comparing a catalog of radio sources in nearby galaxies against…
Weak lensing shear estimation beyond the shape-noise limit: a machine learning approach
Ofer M. Springer, Eran O. Ofek, Yair Weiss +1
Weak lensing shear estimation typically results in per galaxy statistical errors significantly larger than the sought after gravitational signal of only a few percent. These statis…
Supernova PTF12glz: a possible shock breakout driven through an aspherical wind
Maayane T. Soumagnac, Eran O. Ofek, Avishay Gal-Yam +21
We present visible-light and ultraviolet (UV) observations of the supernova PTF12glz. The SN was discovered and monitored in near-UV and R bands as part of a joint GALEX and Paloma…
iPTF 16hgs: A double-peaked Ca-rich gap transient in a metal poor, star forming dwarf galaxy
Kishalay De, Mansi M. Kasliwal, Therese Cantwell +18
Calcium rich gap transients represent an intriguing new class of faint and fast evolving supernovae that exhibit strong [Ca II] emission in their nebular phase spectra. In this pap…
The Robo-AO-2 facility for rapid visible/near-infrared AO imaging and the demonstration of hybrid techniques
Christoph Baranec, Mark Chun, Donald Hall +23
We are building a next-generation laser adaptive optics system, Robo-AO-2, for the UH 2.2-m telescope that will deliver robotic, diffraction-limited observations at visible and nea…
Towards the measurement of the mass of isolated neutron stars - Prediction of future astrometric microlensing events by pulsars
Eran O. Ofek
The mass of single neutron stars (NSs) can be measured using astrometric microlensing events. In such events, the center-of-light motion of a star lensed by a NS will deviate from…
Optimal and Efficient Streak Detection in Astronomical Images
Guy Nir, Barak Zackay, Eran O. Ofek
Identification of linear features (streaks) in astronomical images is important for several reasons, including: detecting fast-moving near-Earth asteroids; detecting or flagging fa…
catsHTM - A tool for fast accessing and cross-matching large astronomical catalogs
Maayane T. Soumagnac, Eran O. Ofek
Fast access to large catalogs is required for some astronomical applications. Here we introduce the catsHTM tool, consisting of several large catalogs reformatted into HDF5-based f…
iPTF Archival Search for Fast Optical Transients
A. Y. Q. Ho, S. R. Kulkarni, P. E. Nugent +18
There has been speculation of a class of relativistic explosions with an initial Lorentz factor smaller than that of classical Gamma-Ray Bursts (GRBs). These "dirty fireballs" woul…