ICRC2015

Session

Parallel GA11 Instruments / Prospects

3 Aug 2015, 11:00

World Forum

1312. Combination of shower-front sampling and imaging in the Tunka Advanced International Gamma-ray and Cosmic ray Astrophysics (TAIGA) project

Maike Kunnas (University of Hamburg)

03/08/2015, 11:00

GA-IN

Oral contribution

For observation of extensive air showers from gamma rays and cosmic rays, shower front sampling arrays (non-imaging technique or timing-arrays) provide good core position, energy and angular resolution while covering a large area and posessing a wide field of view, yielding good sensitivity at the highest energies. However, the gamma-hadron separation power of this method is only poor compared...

1011. A Neural Network-based Reconstruction Algorithm for monoscopically detected Air Showers observed with the H.E.S.S. Experiment

Mr Thomas Murach (Humboldt-Universität zu Berlin)

03/08/2015, 11:15

GA-IN

Oral contribution

The H.E.S.S. experiment entered its second phase with the addition of a new, large telescope called CT5 that has been added to the centre of the existing array of four smaller telescopes. Because of its larger mirror area the new telescope is able to detect fainter air showers, thereby lowering the energy threshold of the array from O(100 GeV) down to a few tens of GeV. Due to the power law...

1172. A Novel Method for Detecting Extended Sources with VERITAS

Josh Cardenzana

03/08/2015, 11:30

GA-IN

Oral contribution

The current standards for estimating the background contribution in IACT data analysis are the ring background model and the reflected region methods. However, these two techniques are poorly suited for analyses of sources with extensions comparable to the detector’s field of view (greater than ~1°). Nearby pulsar wind nebulae, supernova remnants interacting with molecular clouds, and dark...

676. VERITAS Observations under Bright Moonlight

Sean Griffin

03/08/2015, 11:45

GA-IN

Oral contribution

The presence of moonlight is usually a major limiting factor for Imaging Atmospheric Cherenkov Telescopes due to the high sensitivity of the camera photomultiplier tubes (PMTs). In their standard configuration, the extra noise limits the sensitivity of the experiment to gamma-ray signals and the higher PMT currents also accelerates PMT aging. Since fall 2012, observations have been carried out...

1177. FACT - Status and Experience from Three Years Operation of the First SiPM Camera

Adrian Biland (Eidgenossische Technische Hochschule Zurich (ETH))

03/08/2015, 12:00

GA-IN

Oral contribution

The First G-APD Cherenkov Telescope (FACT) is pioneering the usage of solid state photosensors (G-APD, also known as SiPM). The 1440 pixel camera is installed in a 10m$^2$ refurbished HEGRA telescope on the Canary Island La Palma. Physics data-taking with FACT started in October 2011, few hours after installation of the camera. Since Summer 2012, FACT is operated remotely without the...

579. Performance of the MAGIC telescopes after the major upgrade

Julian Sitarek (University of Łódź)

03/08/2015, 12:15

GA-IN

Oral contribution

MAGIC is a system of two Imaging Atmospheric Cherenkov Telescopes located in the Canary island of La Palma, Spain. During summer 2011 and 2012 it underwent a major upgrade. The main subsystems upgraded were the MAGIC-I camera and its trigger system and the readout system of both telescopes. We use observations of the Crab Nebula taken at low and medium zenith angles to assess the key...