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

Kód výsledku v 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>

Nalezeny alternativní kódy

RIV/00216208:11320/23:10475996 RIV/61989592:15310/23:73620316

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10308 - Astronomy (including astrophysics,space science)

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2023

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Journal of Cosmology and Astroparticle Physics

ISSN

1475-7516

e-ISSN

1475-7516

Svazek periodika

2023

Číslo periodika v rámci svazku

5

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

26

Strana od-do

021

Kód UT WoS článku

001038638500010

EID výsledku v databázi Scopus

2-s2.0-85159475261