Clemens Hoischen
(University of Potsdam)
30/07/2015, 11:00
GA-EX
Oral contribution
NGC 253 is one of only two starburst galaxies that is found to emit γ-ray emission from hundreds of MeV to multiple TeV energies. An accurate measurement of the GeV and TeV spectra is crucial to determine the underlying particle accelerators, to probe the dominant emission loss mechanism(s) and to probe the importance of cosmic-ray interaction and transport. The precision of the measurement of...
Mr
Gabriele Cologna
(LSW Heidelberg)
30/07/2015, 11:15
GA-EX
Oral contribution
The BL$\,$Lac object Mrk$\,$501 was observed at Very High Energies (E$\,$>$\,$100$\,$GeV) with H.E.S.S. (High Energy Stereoscopic System) between 2004 and 2014. The source is detected with high significance above $\sim$2$\,$TeV in $\sim$13.6$\,$h livetime. The observations include periods of low flux and active phases. This led to the detection of strong flaring events, which in 2014 showed a...
Dr
Masaaki Hayashida
(Institute for Cosmic-Ray Research, University of Tokyo)
30/07/2015, 11:30
GA-EX
Oral contribution
RX J1136.5+6737 (z=0.1342) is a hard X-ray bright high-peaked frequency BL Lac object as listed in the MAXI 3-year catalog as well as the Swift-BAT catalog. The source has also been detected by Fermi-LAT with a hard photon index of $1.68\pm0.12$, and belongs to the first Fermi-LAT catalog of $>10$ GeV sources, showing bright (photon flux = $11.7\times10^{-11}$ ph cm$^{-2}$ s$^{-1}$) emission...
Valentina Vacca
(Max Planck for Astrophysics)
30/07/2015, 11:45
GA-EX
Oral contribution
We analyze the 6.5 year all-sky data from the Fermi Large Area Telescope restricted to gamma-ray photons with energies between 0.6-307.2 GeV. Raw count maps show a superposition of diffuse and point-like emission structures and are subject to shot noise and instrumental artifacts. Using the D3PO inference algorithm, we model the observed photon counts as the sum of a diffuse and a point-like...
Dr
Marcos Santander
(Barnard College, Columbia University)
30/07/2015, 12:00
GA-EX
Oral contribution
A potential clue to finding the long-sought-after sources of cosmic rays is the recent observation of an astrophysical flux of high-energy neutrinos by the IceCube detector, since these possibly originate in hadronic interactions near cosmic-ray accelerators. While the neutrino sky map shows no indication of point sources so far, it is possible to utilize the sensitivity of TeV Cherenkov...
Azadeh Keivani
(Pennsylvania State University)
30/07/2015, 12:15
GA-EX
Oral contribution
We present the results of archival coincidence analyses between public neutrino data from the 40-string and 59-string configurations of IceCube (IC40 and IC59) with contemporaneous public gamma-ray data from Fermi LAT and Swift. Our analyses have the potential to discover statistically significant coincidences between high-energy neutrinos and gamma-ray signals, and hence, possible...
