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iPTF13beo: The Double-Peaked Light Curve of a Type Ibn Supernova Discovered Shortly after Explosion
Evgeny Gorbikov, Avishay Gal-Yam, Eran O. Ofek +13
We present optical photometric and spectroscopic observations of the Type Ibn (SN 2006jc-like) supernova iPTF13beo. Detected by the intermediate Palomar Transient Factory ~3 hours…
Statistical Searches for Microlensing Events in Large, Non-Uniformly Sampled Time-Domain Surveys: A Test Using Palomar Transient Factory Data
Adrian M. Price-Whelan, Marcel A. Agüeros, Amanda P. Fournier +7
Many photometric time-domain surveys are driven by specific goals, such as searches for supernovae or transiting exoplanets, which set the cadence with which fields are re-imaged.…
Probing Cosmic-Ray Ion Acceleration with Radio-Submm and Gamma-Ray Emission from Interaction-Powered Supernovae
Kohta Murase, Todd A. Thompson, Eran O. Ofek
The optical and near-IR emission from some classes of supernovae (SNe), including Type IIn and possibly some super-luminous SNe, is likely powered by a collision between the SN eje…
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…
Direct evidence for a supernova interacting with a large amount of hydrogen-free circumstellar material
Sagi Ben-Ami, Avishay Gal-Yam, Paolo A. Mazzali +16
We present our observations of SN 2010mb, a Type Ic SN lacking spectroscopic signatures of H and He. SN 2010mb has a slowly-declining light curve (days) that cannot be p…
The Mid-Infrared Light Curve of Nearby Core-Collapse Supernova SN2011dh (PTF11eon)
George Helou, Mansi M. Kasliwal, Eran O. Ofek +3
We present Spitzer observations at 3.6 and 4.5um of the supernova SN2011dh (PTF11eon) in M51 from 18 days to 625 days after explosion. The mid-infrared emission peaks at 24 days af…
A statistical analysis of circumstellar material in Type Ia supernovae
Kate Maguire, Mark Sullivan, Ferdinando Patat +42
A key tracer of the elusive progenitor systems of Type Ia supernovae (SNe Ia) is the detection of narrow blueshifted time-varying Na I D absorption lines, interpreted as evidence o…
Tracing the Orphan Stream to 55 kpc with RR Lyrae Stars
Branimir Sesar, Carl J. Grillmair, Judith G. Cohen +10
We report positions, velocities and metallicities of 50 ab-type RR Lyrae (RRab) stars observed in the vicinity of the Orphan stellar stream. Using about 30 RRab stars classified as…
SN 2010jl: Optical to hard X-ray observations reveal an explosion embedded in a ten solar mass cocoon
E. O. Ofek, A. Zoglauer, S. E. Boggs +24
(Abridged) Some supernovae (SNe) may be powered by the interaction of the SN ejecta with a large amount of circumstellar matter (CSM). Here we outline a method to measure the mass…
Discovery and redshift of an optical afterglow in 71 square degrees: iPTF13bxl and GRB 130702A
Leo P. Singer, S. Bradley Cenko, Mansi M. Kasliwal +20
We report the discovery of the optical afterglow of the gamma-ray burst (GRB) 130702A, identified upon searching 71 square degrees surrounding the Fermi Gamma-ray Burst Monitor (GB…
A multi-wavelength investigation of the radio-loud supernova PTF11qcj and its circumstellar environment
A. Corsi, E. O. Ofek, A. Gal-Yam +20
We present the discovery, classification, and extensive panchromatic (from radio to X-ray) follow-up observations of PTF11qcj, a supernova discovered by the Palomar Transient Facto…
Discovery, Progenitor & Early Evolution of a Stripped Envelope Supernova iPTF13bvn
Yi Cao, Mansi M. Kasliwal, Iair Arcavi +24
The intermediate Palomar Transient Factory reports our discovery of a young supernova, iPTF13bvn, in the nearby galaxy, NGC5806 (22.5Mpc). Our spectral sequence in the optical and…
PTF12gzk - A Rapidly Declining, High-Velocity Type Ic Radio Supernova
Assaf Horesh, Shrinivas R. Kulkarni, Alessandra Corsi +8
Only a few cases of type Ic supernovae (SNe) with high-velocity ejecta have been discovered and studied. Here we present our analysis of radio and X-ray observations of a Type Ic S…
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…
Discovery of a Cosmological, Relativistic Outburst via its Rapidly Fading Optical Emission
S. Bradley Cenko, S. R. Kulkarni, Assaf Horesh +26
We report the discovery by the Palomar Transient Factory (PTF) of the transient source PTF11agg, which is distinguished by three primary characteristics: (1) bright, rapidly fading…
Type Ia Supernovae Strongly Interacting with Their Circumstellar Medium
Jeffrey M. Silverman, Peter E. Nugent, Avishay Gal-Yam +31
Owing to their utility for measurements of cosmic acceleration, Type Ia supernovae (SNe) are perhaps the best-studied class of SNe, yet the progenitor systems of these explosions l…
Sensitive Search For Radio Variables And Transients In The Extended Chandra Deep-Field South
K. P. Mooley, D. A. Frail, E. O. Ofek +3
We report on an analysis of the Extended Chandra Deep Field South (E-CDFS) region using archival data from the Very Large Array, with the goal of studying radio variability and tra…
Science with a wide-field UV transient explorer
I. Sagiv, A. Gal-Yam, E. O. Ofek +11
The time-variable electromagnetic sky has been well-explored at a wide range of wavelengths. Numerous high-energy space missions take advantage of the dark Gamma-ray and X-ray sky…
SN2009ip: Constraints on the progenitor mass-loss rate
E. O. Ofek, L. Lin, C. Kouveliotou +4
Some supernovae (SNe) show evidence for mass-loss events taking place prior to their explosions. Measuring their pre-outburst mass-loss rates provide essential information regardin…
R Coronae Borealis Stars in M31 from the Palomar Transient Factory
Sumin Tang, Yi Cao, Lars Bildsten +10
We report the discovery of R Coronae Borealis (RCB) stars in the Andromeda galaxy (M31) using the Palomar Transient Factory (PTF). RCB stars are rare hydrogen-deficient, carbon-ric…
Disk-Related Bursts and Fades in Young Stars
Krzysztof Findeisen, Lynne Hillenbrand, Eran Ofek +4
We present first results from a new, multiyear, time domain survey of young stars in the North America Nebula complex using the Palomar Transient Factory. Our survey is providing a…
Bringing the Visible Universe into Focus with Robo-AO
Christoph Baranec, Reed Riddle, Nicholas M. Law +13
Light from astronomical objects must travel through the earth's turbulent atmosphere before it can be imaged by ground-based telescopes. To enable direct imaging at maximum theoret…
An outburst from a massive star 40 days before a supernova explosion
E. O. Ofek, M. Sullivan, S. B. Cenko +17
Various lines of evidence suggest that very massive stars experience extreme mass-loss episodes shortly before they explode as a supernova. Interestingly, several models predict su…
The Nuclear Spectroscopic Telescope Array (NuSTAR) Mission
Fiona A. Harrison, William W. Craig, Finn E. Christensen +77
The Nuclear Spectroscopic Telescope Array (NuSTAR) mission, launched on 13 June 2012, is the first focusing high-energy X-ray telescope in orbit. NuSTAR operates in the band from 3…