A Search for Cosmic Ray Bursts at 0.1 PeV with a Small Air Shower Array

@article{65442,
   author = {Clay, Roger and Singh, Jassimar and Homola, Piotr and Olaf, Bar and Beznosko, Dmitry and Bhatt, Apoorva and Bhatta, Gopal and Bibrzycki, Lukasz and Budnev, Nikolay and AlvarezandCastillo, David E and Dhital, Niraj and Duffy, Alan R and Frontczak, Michal and Gora, Dariusz and Gupta, Alok C and Lozowski, Bartosz and Medvedev, Mikhail V and Medrala, Justyna and Miszczyk, Justyna and Niedzwiecki, Michal and Piekarczyk, Marcin and Rzecki, Krzysztof and ZamoraandSaa, Jilberto and Smelcerz, Katarzyna and Smolek, Karel and Sosnicki, Tomasz and Stasielak, Jaroslaw and Stuglik, Slawomir and Sushchov, Oleksandr and Tursunov, Arman and Wibig, Tadeusz},
   article_location = {Švýcarsko},
   article_number = {3},
   doi = {http://dx.doi.org/10.3390/sym14030501},
   keywords = {cosmic rays; extensive air showers; time correlated events; CREDO collaboration},
   language = {eng},
   issn = {2073-8994},
   journal = {SYMMETRY-BASEL},
   title = {A Search for Cosmic Ray Bursts at 0.1 PeV with a Small Air Shower Array},
   url = {https://www.mdpi.com/2073-8994/14/3/501},
   volume = {14},
   year = {2022}
}

TY  - JOUR
ID  - 65442
AU  - Clay, Roger - Singh, Jassimar - Homola, Piotr - Olaf, Bar - Beznosko, Dmitry - Bhatt, Apoorva - Bhatta, Gopal - Bibrzycki, Lukasz - Budnev, Nikolay - Alvarez-Castillo, David E - Dhital, Niraj - Duffy, Alan R - Frontczak, Michal - Gora, Dariusz - Gupta, Alok C - Lozowski, Bartosz - Medvedev, Mikhail V - Medrala, Justyna - Miszczyk, Justyna - Niedzwiecki, Michal - Piekarczyk, Marcin - Rzecki, Krzysztof - Zamora-Saa, Jilberto - Smelcerz, Katarzyna - Smolek, Karel - Sosnicki, Tomasz - Stasielak, Jaroslaw - Stuglik, Slawomir - Sushchov, Oleksandr - Tursunov, Arman - Wibig, Tadeusz
PY  - 2022
TI  - A Search for Cosmic Ray Bursts at 0.1 PeV with a Small Air Shower Array
JF  - SYMMETRY-BASEL
VL  - 14
IS  - 3
SP  - "501-1"-"501-10"
EP  - "501-1"-"501-10"
SN  - 20738994
KW  - cosmic rays
KW  - extensive air showers
KW  - time correlated events
KW  - CREDO collaboration
UR  - https://www.mdpi.com/2073-8994/14/3/501
N2  - 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 its 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 extensive 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 similar to 6 mHz. We have examined event arrival times over a period of over 2.5 years in two equipment configurations (without and with GPS timing), recording similar to 300 k events and similar to 100 k events. We determined 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, these distributions fit closely with expectation, but there are two outliers of short burst periods in data for each configuration. One of these outliers contains eight events within 48 s. The physical characteristics of the array will be discussed together with the analysis procedure, including a comparison between the observed time distributions and expectation based on randomly arriving events.
ER  - 

CLAY, Roger, Jassimar SINGH, Piotr HOMOLA, Bar OLAF, Dmitry BEZNOSKO, Apoorva BHATT, Gopal BHATTA, Lukasz BIBRZYCKI, Nikolay BUDNEV, David E ALVAREZ-CASTILLO, Niraj DHITAL, Alan R DUFFY, Michal FRONTCZAK, Dariusz GORA, Alok C GUPTA, Bartosz LOZOWSKI, Mikhail V MEDVEDEV, Justyna MEDRALA, Justyna MISZCZYK, Michal NIEDZWIECKI, Marcin PIEKARCZYK, Krzysztof RZECKI, Jilberto ZAMORA-SAA, Katarzyna SMELCERZ, Karel SMOLEK, Tomasz SOSNICKI, Jaroslaw STASIELAK, Slawomir STUGLIK, Oleksandr SUSHCHOV, Arman TURSUNOV and Tadeusz WIBIG. A Search for Cosmic Ray Bursts at 0.1 PeV with a Small Air Shower Array. \textit{SYMMETRY-BASEL}. Švýcarsko, 2022, vol.~14, No~3, p.~''501-1''-''501-10'', 10 pp. ISSN~2073-8994. Available from: https://dx.doi.org/10.3390/sym14030501.