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Flash Spectroscopy: Emission Lines from the Ionized Circumstellar Material around -Day-Old Type II Supernovae
D. Khazov, O. Yaron, A. Gal-Yam +24
Supernovae (SNe) embedded in dense circumstellar material (CSM) may show prominent emission lines in their early-time spectra ( days after the explosion), owing to recombi…
Radio observations of a sample of broad-lined type Ic supernovae discovered by PTF/iPTF: A search for relativistic explosions
A. Corsi, A. Gal-Yam, S. R. Kulkarni +15
Long duration gamma-ray bursts are a rare subclass of stripped-envelope core-collapse supernovae that launch collimated relativistic outflows (jets). All gamma-ray-burst-associated…
Type II supernova energetics and comparison of light curves to shock-cooling models
Adam Rubin, Avishay Gal-Yam, Annalisa De Cia +37
During the first few days after explosion, Type II supernovae (SNe) are dominated by relatively simple physics. Theoretical predictions regarding early-time SN light curves in the…
Happy Birthday Swift: Ultra-long GRB141121A and its broad-band Afterglow
A. Cucchiara, P. Veres, A. Corsi +27
We present our extensive observational campaign on the Swift-discovered GRB141121A, al- most ten years after its launch. Our observations covers radio through X-rays, and extends f…
Millimeter-band variability of the radio-quiet nucleus of NGC7469
Ranieri D. Baldi, Ehud Behar, Ari Laor +1
We report short-cadence monitoring of a radio-quiet Active Galactic Nuclei (AGN), NGC7469, at 95 GHz (3 mm) over a period of 70 days with the CARMA telescope. The AGN varies signif…
Did the progenitor of SN2011dh have a binary companion?
J. R. Maund, I. Arcavi, M. Ergon +6
We present late-time Hubble Space Telescope (HST) ultraviolet (UV) and optical observations of the site of SN 2011dh in the galaxy M51, ~1164 days post-explosion. At the SN locatio…
Detection of a Type IIn Supernova in Optical Follow-up Observations of IceCube Neutrino Events
M. G. Aartsen, K. Abraham, M. Ackermann +331
The IceCube neutrino observatory pursues a follow-up program selecting interesting neutrino events in real-time and issuing alerts for electromagnetic follow-up observations. In Ma…
The unusual radio afterglow of the ultra-long gamma-ray burst GRB 130925A
Assaf Horesh, S. Bradley Cenko, Daniel A. Perley +3
GRB 130925A is one of the recent additions to the growing family of ultra-long GRBs (T90 s). While the X-ray emission of ultra-long GRBs have been studied extensivel…
Strong Ultraviolet Pulse From a Newborn Type Ia Supernova
Yi Cao, S. R. Kulkarni, D. Andrew Howell +19
Type Ia supernovae are destructive explosions of carbon oxygen white dwarfs. Although they are used empirically to measure cosmological distances, the nature of their progenitors r…
Discovery of Millimeter-Wave Excess Emission in Radio-Quiet Active Galactic Nuclei
Ehud Behar, Ranieri D. Baldi, Ari Laor +3
The physical origin of radio emission in Radio Quiet Active Galactic Nuclei (RQ AGN) remains unclear, whether it is a downscaled version of the relativistic jets typical of Radio L…
iPTF14yb: The First Discovery of a GRB Afterglow Independent of a High-Energy Trigger
S. Bradley Cenko, Alex L. Urban, Daniel A. Perley +34
We report here the discovery by the Intermediate Palomar Transient Factory (iPTF) of iPTF14yb, a luminous ( mag), cosmological (redshift 1.9733), rapidly fading…
A Multiwavelength Study of the Relativistic Tidal Disruption Candidate Sw J2058+05 at Late Times
Dheeraj R. Pasham, S. Bradley Cenko, Andrew J. Levan +13
We report a multiwavelength (X-ray, ultraviolet/optical/infrared, radio) analysis of the relativistic tidal disruption event candidate Sw J2058+05 from 3 months to 3 yr post-discov…
Necessary and sufficient conditions for macroscopic realism from quantum mechanics
Lucas Clemente, Johannes Kofler
Macroscopic realism, the classical world view that macroscopic objects exist independently of and are not influenced by measurements, is usually tested using Leggett-Garg inequalit…