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

@inproceedings{66664,
   author = {Clay, Roger and Singh, Jassimar and Sushchov, Oleksandr and Homola, Piotr and Alvarez Castillo, David E. and Beznosko, Dmitriy and Budnev, Nikolai and Gora, Dariusz and Gupta, Alok C. and Hnatyk, Bohdan and Kasztelan, Marcin and Kovacs, Peter and Lozowski, Bartosz and Medvedev, Mikhail V. and Miszczyk, Justyna and Mozgova, Alona and Nazari, Vahab and Niedzwiecki, Michael and Pawlik, Maciej and Rosas, Matias and Rzecki, Krzyztof and Smelcerz, Katarzyna and Smolek, Karel and Stasielak, Jaroslaw and Stuglik, Slawomir and Svanidze, Manana and Tursunov, Arman and Verbetsky, Yuri and Wibig, Tadeus and ZamoraandSaa, Jilberto and Clay, Roger and Singh, Jassimar},
   address = {Itálie},
   booktitle = {Proceedings of Science},
   doi = {http://dx.doi.org/10.22323/1.395.0298},
   keywords = {Cosmic rays;CREDO;Cosmology;time distributions;time clustering},
   howpublished = {elektronická verze "online"},
   language = {eng},
   location = {Itálie},
   pages = {" 298-1"-" 298-8"},
   publisher = {Basel: Molecular Diversity Preservation International (MDPI)},
   title = {A search for bursts at 0.1 PeV with a small air shower array},
   url = {https://pos.sissa.it/395/298},
   year = {2022}
}

TY  - JOUR
ID  - 66664
AU  - Clay, Roger - Singh, Jassimar - Sushchov, Oleksandr - Homola, Piotr - Alvarez Castillo, David E. - Beznosko, Dmitriy - Budnev, Nikolai - Gora, Dariusz - Gupta, Alok C. - Hnatyk, Bohdan - Kasztelan, Marcin - Kovacs, Peter - Lozowski, Bartosz - Medvedev, Mikhail V. - Miszczyk, Justyna - Mozgova, Alona - Nazari, Vahab - Niedzwiecki, Michael - Pawlik, Maciej - Rosas, Matias - Rzecki, Krzyztof - Smelcerz, Katarzyna - Smolek, Karel - Stasielak, Jaroslaw - Stuglik, Slawomir - Svanidze, Manana - Tursunov, Arman - Verbetsky, Yuri - Wibig, Tadeus - Zamora-Saa, Jilberto - Clay, Roger - Singh, Jassimar
PY  - 2022
TI  - A search for bursts at 0.1 PeV with a small air shower array
PB  - Basel: Molecular Diversity Preservation International (MDPI)
CY  - Itálie
KW  - Cosmic rays;CREDO;Cosmology;time distributions;time clustering
UR  - https://pos.sissa.it/395/298
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 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.
ER  - 

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, Yuri VERBETSKY, Tadeus WIBIG, Jilberto ZAMORA-SAA, Roger CLAY and Jassimar SINGH. A search for bursts at 0.1 PeV with a small air shower array. Online. In \textit{Proceedings of Science}. Itálie: Basel: Molecular Diversity Preservation International (MDPI), 2022, p.~'' 298-1''-'' 298-8'', 10 pp. ISSN~1824-8039. Available from: https://dx.doi.org/10.22323/1.395.0298.