Dr
Takeshi NAKAMORI
(Yamagata University)
05/08/2015, 14:00
GA-EX
Oral contribution
We perform simulations of Cherenkov Telescope Array (CTA) observations
of a young supernova remnant RX J1713.7−3946. This target is not only
one of the brightest sources ever discovered in very high-energy (VHE)
gamma-rays but also well observed in other wavebands. In X-rays, the
emission is dominated by synchrotron radiation, which links directly
to the existence of high-energy...
Luigi Tibaldo
(SLAC)
05/08/2015, 14:15
GA-EX
Oral contribution
Cosmic rays up to at least PeV energies are usually described in the framework of an elementary scenario that involves acceleration by objects that are located in the disk of the Milky Way, such as supernova remnants or massive star-forming regions, and then diffusive propagation throughout the Galaxy. Details of the propagation process are so far inferred mainly from the composition of cosmic...
Francesco de Palma
(INFN)
05/08/2015, 14:30
GA-EX
Oral contribution
Galactic cosmic ray (CRs) sources, classically proposed to be Supernova Remnants (SNRs), must meet the energetic particle content required by direct measurements of high energy CRs. Indirect gamma-ray measurements of SNRs with the Fermi Large Area Telescope (LAT) have now shown directly that at least three SNRs accelerate protons. With the first Fermi LAT SNR Catalog, we have systematically...
Nicolas Renault-Tinacci
(Institut d'Astrophysique de Paris)
05/08/2015, 14:45
GA-EX
Oral contribution
Millisecond pulsars (MSPs) are a growing class of gamma-ray emitters. Spectral analyses of their pulsed emission bring important constraints to the theoretical models which describe the electromagnetic processes responsible for high-energy radiations in pulsar magnetospheres. The gamma-ray data collected during five years of Fermi Large Area Telescope (LAT) observations have allowed in-depth...
Dario Gasparrini
(ASDC/ INFN Perugia)
05/08/2015, 15:00
GA-EX
Oral contribution
The third catalog of active galactic nuclei (AGNs) detected by the Fermi Large Area Telescope (3LAC) is presented. It is based on the third catalog (3FGL, Acero et al. 2015, arxiv 1501.02003) of sources detected with a test statistic greater than 25, using the first 4 years of data. The 3LAC includes 1591 AGNs located at high (|b|>10°) Galactic latitudes (with 28 duplicate associations,...
Chi Cheung
(Naval Research Laboratory)
05/08/2015, 15:15
GA-EX
Oral contribution
Novae are now firmly established as a high-energy (>100 MeV) gamma-ray source class by the Fermi Large Area Telescope (LAT). In symbiotic systems such as V407 Cyg 2010, there is a firm theoretical framework for the production of shock-acceleration particles in the nova ejecta from interactions with the dense wind of the red giant companion. Yet, the >100 MeV emission detected in classical...
Thibaut Desgardin
(LUPM)
05/08/2015, 15:30
GA-EX
Oral contribution
The Large Area Telescope (LAT) collaboration has recently completed the development of the "Pass 8" event-level analysis that provides a comprehensive revision of the algorithms used for event reconstruction and particle identification. Among other performance improvements, Pass 8 provides a drastic increase in the effective area of the LAT instrument below 100 MeV. Together with a better...
Dr
Sara Buson
(University of Padova)
05/08/2015, 15:45
GA-EX
Oral contribution
The double-image gravitationally lensed blazar B0218+357 displayed several intervals of enhanced activity at gamma-rays. Fermi LAT observations focussed on the 2012 flaring interval led to the measurement at >100 MeV energies of a delay between the two lensed images of 11.46 ± 0.16 days. The delay is about 1 day longer than previously measured at radio wavelengths. Renewed flaring activity has...