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- Centre National de la Recherche ScientifiqueFR348 papers
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15 papers · 2 filters
Polarization Signatures of Relativistic Magnetohydrodynamic Shocks in the Blazar Emission Region - I. Force-free Helical Magnetic Fields
Haocheng Zhang, Wei Deng, Hui Li +1
The optical radiation and polarization signatures in blazars are known to be highly variable during flaring activities. It is frequently argued that shocks are the main driver of t…
A hard gamma-ray flare from 3C 279 in 2013 December
Vaidehi S. Paliya, Chris Diltz, Markus Bottcher +2
The blazar 3C 279 exhibited twin -ray flares of similar intensity in 2013 December and 2014 April. In this work, we present a detailed multi-wavelength analysis of the 2013 Dece…
PS1-10jh Continues to Follow the Fallback Accretion Rate of a Tidally Disrupted Star
S. Gezari, R. Chornock, A. Lawrence +5
We present late-time observations of the tidal disruption event candidate PS1-10jh. UV and optical imaging with HST/WFC3 localize the transient to be coincident with the host galax…
Metamorphosis of SN 2014C: Delayed Interaction Between a Hydrogen Poor Core-collapse Supernova and a Nearby Circumstellar Shell
D. Milisavljevic, R. Margutti, A. Kamble +19
We present optical observations of supernova SN 2014C, which underwent an unprecedented slow metamorphosis from H-poor type Ib to H-rich type IIn over the course of one year. The o…
Efficient Production of High-energy Nonthermal Particles during Magnetic Reconnection in a Magnetically-dominated Ion-Electron Plasma
Fan Guo, Xiaocan Li, Hui Li +6
Magnetic reconnection is a leading mechanism for dissipating magnetic energy and accelerating nonthermal particles in Poynting-flux dominated flows. In this letter, we investigate…
Violent Hard X-ray Variability of Mrk 421 Observed by NuSTAR in 2013 April
Vaidehi S. Paliya, Markus Bottcher, Chris Diltz +3
The well studied blazar Markarian 421 (Mrk 421, =0.031) was the subject of an intensive multi-wavelength campaign when it flared in 2013 April. The recorded X-ray and very high…