THE NUCLEAR SPECTROSCOPIC TELESCOPE ARRAY (NuSTAR) HIGH-ENERGY X-RAY MISSION
- F. Harrison, W. Craig, C. M. Urry
- PhysicsIEEE Aerospace Conference
- 30 January 2013
The Nuclear Spectroscopic Telescope Array (NuSTAR) mission, launched on 2012 June 13, is the first focusing high-energy X-ray telescope in orbit. NuSTAR operates in the band from 3 to 79 keV,…
The Palomar Transient Factory: System Overview, Performance, and First Results
- N. Law, S. Kulkarni, J. Zolkower
- Physics
- 30 June 2009
The Palomar Transient Factory (PTF) is a fully-automated, wide-field survey aimed at a systematic exploration of the optical transient sky. The transient survey is performed using a new 8.1 square…
Relativistic ejecta from X-ray flash XRF 060218 and the rate of cosmic explosions
- A. Soderberg, S. Kulkarni, P. McCarthy
- PhysicsNature
- 18 April 2006
Radio and X-ray observations of XRF 060218 (associated with supernova SN 2006aj), the second-nearest GRB identified until now, are reported, showing that this event is a hundred times less energetic but ten times more common than cosmological GRBs.
Hydrogen-poor superluminous stellar explosions
- R. Quimby, S. Kulkarni, D. Levitan
- PhysicsNature
- 1 October 2009
Observations of a class of luminous supernovae whose properties cannot be explained by any of the following processes: radioactive decay of freshly synthesized elements, explosion shock in the envelope of a supergiant star, and interaction between the debris and slowly moving, hydrogen-rich circumstellar material.
An Extremely Luminous Panchromatic Outburst from the Nucleus of a Distant Galaxy
Multiwavelength observations of a unique γ-ray–selected transient detected by the Swift satellite, accompanied by bright emission across the electromagnetic spectrum, and whose properties are unlike any previously observed source are presented.
An extremely luminous X-ray outburst at the birth of a supernova
- A. Soderberg, E. Berger, D. York
- PhysicsNature
- 13 February 2008
This work reports the serendipitous discovery of a supernova at the time of the explosion, marked by an extremely luminous X-ray outburst, and attributes the outburst to the ‘break-out’ of the supernova shock wave from the progenitor star, and shows that the inferred rate of such events agrees with that of all core-collapse supernovae.
Supernova SN 2011fe from an exploding carbon–oxygen white dwarf star
- P. Nugent, M. Sullivan, D. Poznanski
- PhysicsNature
- 27 October 2011
Early observations of type Ia supernova SN 2011fe in the galaxy M101 at a distance from Earth of 6.4 megaparsecs find that the exploding star was probably a carbon–oxygen white dwarf, and from the lack of an early shock it is concluded that the companion was likely a main-sequence star.
Illuminating gravitational waves: A concordant picture of photons from a neutron star merger
- M. Kasliwal, E. Nakar, W. Zhao
- PhysicsScience
- 16 October 2017
It is demonstrated that merging neutron stars are a long-sought production site forging heavy elements by r-process nucleosynthesis, which is dissimilar to classical short gamma-ray bursts with ultrarelativistic jets.
Spectral techniques applied to sparse random graphs
The eigenvalue gap for the adjacency matrices of sparse random graphs is analyzed and it is shown that by removing a small number of vertices of highest degree in G, one gets a graph G′ for which $\lambda = O(\sqrt{d})$.
A CONTINUUM OF H- TO He-RICH TIDAL DISRUPTION CANDIDATES WITH A PREFERENCE FOR E+A GALAXIES
- I. Arcavi, A. Gal-yam, R. Laher
- Physics
- 6 May 2014
We present the results of a Palomar Transient Factory (PTF) archival search for blue transients that lie in the magnitude range between “normal” core-collapse and superluminous supernovae (i.e., with…
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