scholarly journals Overview of the Auger@TA project and preliminary results from Phase I

2019 ◽  
Vol 210 ◽  
pp. 05002
Author(s):  
Fred Sarazin ◽  
Corbin Covault ◽  
Toshihiro Fujii ◽  
Robert Halliday ◽  
Jeffrey Johnsen ◽  
...  
Keyword(s):  
Phase I ◽  
Pierre Auger Observatory ◽  
Gear Up ◽  
Air Showers ◽  
Telescope Array ◽  
Surface Detector ◽  
First Results ◽  
Micro Array ◽  
Cross Calibration

We report on the first results of a unique in-situ experimental cross-calibration effort of the surface detector of the Pierre Auger Observatory and of the Telescope Array experiment (Auger@TA). In the first phase of Auger@TA, we performed surface detector station-to-station comparisons for a collection of extensive air showers landing near the experimental setup and detected by Telescope Array. Beyond the deduced cross-calibration curve between the Water-Cherenkov-based Auger and Scintillator-based TA Surface Detector stations, we also investigate the consistency of their response for individual reconstructed showers. The dataset is currently too small to draw firm conclusions as-of-yet. Hence, phase I data taking will continue even as we gear up for the deployment of an Auger micro-array within Telescope Array as part of Phase II of this work.

scholarly journals The Auger@TA Project: Phase II Progress and Plans

2019 ◽  
Vol 210 ◽  
pp. 05004 ◽  
Author(s):  
Corbin Covault ◽  
Toshihiro Fujii ◽  
Robert Halliday ◽  
Jeffrey Johnsen ◽  
Ryan Lorek ◽  
...  
Keyword(s):  
Phase Ii ◽  
Pierre Auger Observatory ◽  
Air Showers ◽  
Telescope Array ◽  
Air Shower ◽  
Surface Detector ◽  
Laser Facility ◽  
Micro Array ◽  
Water Tanks ◽  
Data Calibration

The Auger@TA project is a combined effort involving members of both the Pierre Auger Observatory and the Telescope Array experiment (TA) to cross-calibrate detectors and compare results on air showers detected at one location. We have recently reported results from Phase I of the project, during which we collected and presented data from two Auger water Cherenkov surface detector stations deployed into the TA experiment near the Central Laser Facility. For Phase II, we will deploy a micro-array of six or seven single-PMT Auger surface detector stations co-located with TA scintillator surface detector stations. The Auger micro-array will trigger and collect data independently from the TA allowing for a complete end-to-end comparison of detector data, calibration, and reconstructed event quantities on a shower-by-shower basis between the TA and Auger detector systems. We describe progress towards development of the micro-array for Phase II including the preparation of surface detector water tanks, station electronics, wireless communications, triggers, and data acquisition. We also outline plans for deploying the Auger@TA micro-array into the TA experiment in 2019 with preliminary estimates for coincident air-shower rates.

scholarly journals Depth of maximum of air-shower profiles: testing the compatibility of measurements performed at the Pierre Auger Observatory and the Telescope Array experiment

2019 ◽  
Vol 210 ◽  
pp. 01009
Author(s):  
Alexey Yushkov ◽  
Jose Bellido ◽  
John Belz ◽  
Vitor de Souza ◽  
William Hanlon ◽  
...  
Keyword(s):  
Quantitative Comparison ◽  
Pierre Auger Observatory ◽  
Array Detector ◽  
Air Showers ◽  
Fluorescence Detector ◽  
Telescope Array ◽  
Longitudinal Development ◽  
Air Shower ◽  
Direct Observations ◽  
Systematic Uncertainties

At the Pierre Auger Observatory and the Telescope Array, the measurements of depths of maximum of airshower profiles, Xmax, are performed using direct observations of the longitudinal development of showers with the help of the fluorescence telescopes. Though the same detection technique is used at both installations, the straightforward comparison of the characteristics of the measured Xmax distributions is not possible due to the different approaches to the analysis of the recorded events. In this work, the Auger – Telescope Array composition working group presents a technique to compare the Xmax measurements from the Auger Observatory and the Telescope Array. Applying this technique the compatibility of the first two moments of the measured Xmax distributions is qualitatively tested for energies 1018.2 eV < E < 1019.0 eV using the recently published Telescope Array data from the Black Rock Mesa and Long Ridge fluorescence detector stations. For a quantitative comparison, simulations of air showers with EPOS-LHC, folded with effects of the Telescope Array detector, are required along with the inclusion in the analysis of the systematic uncertainties in the measurements of Xmax and the energies of the events.

scholarly journals Atmospheric Monitoring at a Cosmic Ray Observatory - a long-lasting endeavour

2019 ◽  
Vol 197 ◽  
pp. 02001
Author(s):  
Bianca Keilhauer
Keyword(s):  
Cosmic Rays ◽  
Cosmic Ray ◽  
Extensive Air Showers ◽  
Pierre Auger Observatory ◽  
Ultrahigh Energy ◽  
Atmospheric Conditions ◽  
Air Showers ◽  
Atmospheric Monitoring ◽  
Surface Detector ◽  
Planning And Construction

The Pierre Auger Observatory for detecting ultrahigh energy cosmic rays has been founded in 1999. After a main planning and construction phase of about five years, the regular data taking started in 2004, but it took another four years until the full surface detector array was deployed. In parallel to the main detectors of the Observatory, a comprehensive set of instruments for monitoring the atmospheric conditions above the array was developed and installed as varying atmospheric conditions influence the development and detection of extensive air showers. The multitude of atmospheric monitoring installations at the Pierre Auger Observatory will be presented as well as the challenges and efforts to run such instruments for several decades.

scholarly journals COSMIC RAYS AT THE HIGHEST ENERGIES — FIRST DATA FROM THE PIERRE AUGER OBSERVATORY

2007 ◽  
Vol 16 (04) ◽  
pp. 1093-1105
Author(s):  
◽  
KARL-HEINZ KAMPERT
Keyword(s):  
Cosmic Rays ◽  
High Energy ◽  
Pierre Auger Observatory ◽  
Arrival Direction ◽  
Air Showers ◽  
High Energy Cosmic Rays ◽  
First Results ◽  
Fluorescence Light ◽  
Under Construction ◽  
Water Cherenkov Detectors

The southern Pierre Auger Observatory, presently under construction in Malargüe, Argentina, is nearing completion. The instrument is designed to measure extensive air-showers with energies ranging from 1018-1020 eV and beyond. It combines two complementary observation techniques; the detection of particles at ground and the coincident observation of associated fluorescence light generated in the atmosphere above the ground. This is being realized by employing an array of 1600 water Cherenkov detectors, distributed over an area of 3000 km2, and operating 24 wide-angle Schmidt telescopes, positioned at four sites at the border of the ground array. The Observatory will reach its full size only in 2007 but data are routinely recorded already and have started to provide relevant science results. This talk will focus on the detector characterizations and presents first results on the arrival direction of extremely-high energy cosmic rays, their energy spectrum, and on the upper limit of the photon fraction.

scholarly journals Ultrahigh Energy Neutrinos at the Pierre Auger Observatory

2013 ◽  
Vol 2013 ◽  
pp. 1-18 ◽  
Author(s):  
P. Abreu ◽  
M. Aglietta ◽  
M. Ahlers ◽  
E. J. Ahn ◽  
I. F. M. Albuquerque ◽  
...  
Keyword(s):  
Pierre Auger Observatory ◽  
Detector Array ◽  
Ultrahigh Energy ◽  
Astroparticle Physics ◽  
Air Showers ◽  
Diffuse Flux ◽  
The Earth ◽  
Surface Detector ◽  
A Priority

The observation of ultrahigh energy neutrinos (UHEνs) has become a priority in experimental astroparticle physics. UHEνs can be detected with a variety of techniques. In particular, neutrinos can interact in the atmosphere (downward-goingν) or in the Earth crust (Earth-skimmingν), producing air showers that can be observed with arrays of detectors at the ground. With the surface detector array of the Pierre Auger Observatory we can detect these types of cascades. The distinguishing signature for neutrino events is the presence of very inclined showers produced close to the ground (i.e., after having traversed a large amount of atmosphere). In this work we review the procedure and criteria established to search for UHEνs in the data collected with the ground array of the Pierre Auger Observatory. This includes Earth-skimming as well as downward-going neutrinos. No neutrino candidates have been found, which allows us to place competitive limits to the diffuse flux of UHEνs in the EeV range and above.

scholarly journals Measurements of Horizontal Air Showers with the Auger Engineering Radio Array

2019 ◽  
Vol 216 ◽  
pp. 02001 ◽  
Author(s):  
Marvin Gottowik
Keyword(s):  
Cosmic Rays ◽  
Antenna Array ◽  
Radio Signal ◽  
Cosmic Ray ◽  
Pierre Auger Observatory ◽  
Large Area ◽  
Air Showers ◽  
Radio Detection ◽  
Surface Detector ◽  
Electromagnetic Component

The Pierre Auger Observatory is the largest observatory for the detection of cosmic rays. With the Auger Engineering Radio Array (AERA) we measure the emitted radio signal of extensive air showers and reconstruct properties of the primary cosmic rays. For horizontal air showers (zenith angles larger than 60°) the signal is distributed over a large area of more than several km2. Therefore, detection of air showers using a sparse radio antenna array, compatible with the 1500 m distance between the 1600 surface detector stations, is possible. The radio technique is sensitive to the electromagnetic component of air showers. Combining radio detection with particle information from the surface detector of the Observatory, which at large zenith angles mostly detects muons, allows to study the cosmic ray composition for horizontal air showers.

scholarly journals Atmospheric effects on extensive air showers observed with the surface detector of the Pierre Auger observatory

2009 ◽  
Vol 32 (2) ◽  
pp. 89-99 ◽  
Author(s):  
J. Abraham ◽  
P. Abreu ◽  
M. Aglietta ◽  
C. Aguirre ◽  
E.J. Ahn ◽  
...  
Keyword(s):  
Extensive Air Showers ◽  
Pierre Auger Observatory ◽  
Atmospheric Effects ◽  
Air Showers ◽  
Surface Detector
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