ICRC2015

Session

Parallel GA03 Pulsars

30 Jul 2015, 14:00

World Forum

563. Constraining photon dispersion relation from observations of the Vela pulsar with H.E.S.S

Mathieu Chrétien (LPNHE CNRS/IN2P3)

30/07/2015, 14:00

GA-EX

Oral contribution

Constraining photon dispersion relation from observations of the Vela pulsar with H.E.S.S ------------------------------------------------------------------------ *M.Chrétien, J. Bolmont, A. Jacholkowska, for the H.E.S.S. collaboration* Some approaches to Quantum Gravity (QG) predict a modification of the dispersion relations also known as a Lorentz Invariance Violation. The effect is...

635. A Population of TeV Pulsar Wind Nebulae in the H.E.S.S. Galactic Plane Survey

Stefan Klepser (DESY)

30/07/2015, 14:15

GA-EX

Oral contribution

The H.E.S.S. Galactic Plane Survey (HGPS) constitutes the deepest scan of the inner Milky Way in TeV gamma rays to date. The dominant class of objects in this 10-year survey are Galactic pulsar wind nebulae (PWNe). Aside from a uniform reassessment of the observational parameters of PWNe already found in the past years, the HGPS for the first time allows for the extraction of flux upper...

953. Search for gamma rays above 100 TeV from the Crab Nebula using the Tibet air shower array and the 100 m2 muon detector

Dr Takashi SAKO (Institute for Cosmic Ray Research, University of Tokyo)

30/07/2015, 14:30

GA-EX

Oral contribution

The Crab Nebula is the standard calibration candle for TeV cosmic gamma-ray experiments. None of those experiments has detected gamma rays above 100 TeV from the Crab Nebula, and the best upper limits have been given by the CASA-MIA experiment. In the circumstances, it is a common understanding that the energy spectrum of the Crab Nebula can be reproduced well by a mechanism based on the...

348. Observations of the Crab Nebula with Early HAWC Data

Francisco Salesa Greus (The Pennsylvania State University)

30/07/2015, 14:45

GA-EX

Oral contribution

The High Altitude Water Cherenkov (HAWC) Observatory is a TeV gamma-ray detector which has been completed in early 2015. HAWC started science operations in August 2013 with a fraction of the detector taking data. Several known gamma-ray sources have been already detected with the first HAWC data. Among these sources, the Crab Nebula, the brightest steady gamma-ray source at very high energies...

707. Six years of VERITAS observations of the Crab Nebula

Dr Kevin Meagher (Université libre de Bruxelles)

30/07/2015, 15:00

GA-EX

Oral contribution

The Crab Nebula is the brightest source in the very-high-energy (VHE) gamma-ray sky and one of the best studied non-thermal objects. The dominant VHE emission mechanism is believed to be inverse Compton scattering of low energy photons on relativistic electrons. While it is unclear how the electrons are accelerated to energies of 10¹⁶ eV, it is general consensus that the ultimate...

940. The most precise measurements of the Crab nebula inverse Compton spectral component

Roberta Zanin (Universitat de Barcelona)

30/07/2015, 15:15

GA-EX

Oral contribution

The Crab pulsar wind nebula (PWN) is one of the best studied astrophysical objects. Due to its brightness at all wavelengths, precise measurements are provided by different kind of instruments, allowing for many discoveries, later seen in other non-thermal sources, and a detailed examination of its physics. Most of the theoretical models for PWN emission are, in fact, based on Crab nebula...