D 2022

A search for bursts at 0.1 PeV with a small air shower array

CLAY, Roger, Jassimar SINGH, Oleksandr SUSHCHOV, Piotr HOMOLA, David E. ALVAREZ CASTILLO et. al.

Basic information

Original name

A search for bursts at 0.1 PeV with a small air shower array

Authors

CLAY, Roger, Jassimar SINGH, Oleksandr SUSHCHOV, Piotr HOMOLA, David E. ALVAREZ CASTILLO, Dmitriy BEZNOSKO, Nikolai BUDNEV, Dariusz GORA, Alok C. GUPTA, Bohdan HNATYK, Marcin KASZTELAN, Peter KOVACS, Bartosz LOZOWSKI, Mikhail V. MEDVEDEV, Justyna MISZCZYK, Alona MOZGOVA, Vahab NAZARI, Michael NIEDZWIECKI, Maciej PAWLIK, Matias ROSAS, Krzyztof RZECKI, Katarzyna SMELCERZ, Karel SMOLEK, Jaroslaw STASIELAK, Slawomir STUGLIK, Manana SVANIDZE, Arman TURSUNOV (860 Uzbekistan, belonging to the institution), Yuri VERBETSKY, Tadeus WIBIG, Jilberto ZAMORA-SAA, Roger CLAY and Jassimar SINGH

Edition

Itálie, Proceedings of Science, p. " 298-1"-" 298-8", 10 pp. 2022

Publisher

Basel: Molecular Diversity Preservation International (MDPI)

Other information

Language

English

Type of outcome

Stať ve sborníku

Field of Study

10308 Astronomy

Country of publisher

Italy

Confidentiality degree

není předmětem státního či obchodního tajemství

Publication form

electronic version available online

References:

RIV identification code

RIV/47813059:19630/22:A0000244

Organization unit

Institute of physics in Opava

ISSN

Keywords in English

Cosmic rays;CREDO;Cosmology;time distributions;time clustering

Tags

Tags

International impact, Reviewed
Změněno: 25/3/2023 17:37, Mgr. Pavlína Jalůvková

Abstract

V originále

The Cosmic Ray Extremely Distributed Observatory (CREDO) pursues a global research strategy dedicated to the search for correlated cosmic rays, so-called Cosmic Ray Ensembles (CRE). Its general approach to CRE detection does not involve any a priori considerations and the search strategy encompasses both spatial and temporal correlations, on different scales. Here we search for time clustering of the cosmic ray events collected with a small sea-level air shower array at the University of Adelaide. The array consists of seven one square metre scintillators enclosing an area of 10 m x 19 m. It has a threshold energy ~0.1 PeV, and records cosmic ray showers at a rate of ~6 mHz. We have examined event times over a period of almost two years (~294k events) to determine the event time spacing distributions between individual events and the distributions of time periods which contained specific numbers of multiple events. We find that the overall time distributions are as expected for random events. The distribution which was chosen a priori for particular study was for time periods covering five events (four spacings). Overall, this fits closely with expectation but has two outliers of short ‘burst’ periods. One of these outliers contains eight events within 48 seconds. The physical characteristics of the array will be discussed together with the analysis procedure, including a fit between the observed time distributions and expectation based on randomly arriving events.