Search for photons above 1019eV with the surface detector of the Pierre Auger Observatory

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F23%3A00577871" target="_blank" >RIV/68378271:_____/23:00577871 - isvavai.cz</a>
Alternative codes found
RIV/00216208:11320/23:10475996 RIV/61989592:15310/23:73620316
Result on the web
<a href="https://hdl.handle.net/11104/0346968" target="_blank" >https://hdl.handle.net/11104/0346968</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1088/1475-7516/2023/05/021" target="_blank" >10.1088/1475-7516/2023/05/021</a>

Result language
angličtina
Original language name
Search for photons above 1019eV with the surface detector of the Pierre Auger Observatory
Original language description
We use the surface detector of the Pierre Auger Observatory to search for air showers initiated by photons with an energy above 1019 eV. Photons in the zenith angle range from 30 & DEG, to 60 & DEG, can be identified in the overwhelming background of showers initiated by charged cosmic rays through the broader time structure of the signals induced in the water Cherenkov detectors of the array and the steeper lateral distribution of shower particles reaching ground. Applying the search method to data collected between January 2004 and June 2020, upper limits at 95% CL are set to an E-2 diffuse flux of ultra-high energy photons above 1019 eV, 2x1019 eV and 4x1019 eV amounting to 2.11x10-3, 3.12x10-4 and 1.72x10-4 km-2 sr-1 yr-1, respectively. While the sensitivity of the present search around 2 x 1019 eV approaches expectations of cosmogenic photon fluxes in the case of a pure-proton composition, it is one order of magnitude above those from more realistic mixed-composition models.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10308 - Astronomy (including astrophysics,space science)

Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2023
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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