… Thus, we conclude that our TS may allow one to constrain either the UHECR composition
or the UHECR source density from one and the same arrival direction distribution. We leave a …

… We study the chemical composition of ultrahigh … mode), or by one fluorescence detector
(monocular mode), and one fluorescence detector and the TA surface detector (hybrid mode). …

… the composition of ultra high energy cosmic rays (UHECRs). UHECR composition will help
… Xmax data is collected in hybrid mode by searching for time coincident events in the SD and …

… The composition of UHECR also has a major impact on predictions of the minimal … for
determining sources of UHECR, by searching for anisotropy. If cosmic ray composition is light, and …

… Utah, USA, and has operated in a hybrid mode since May 2008. It includes the surface detector
… The largest uncertainty of composition models in our method is related to UHECR source …

… precise information about the composition of cosmic rays as a … to our understanding of
composition, and emerging evidence … emission from extensive air showers produced by UHECR. …

… Traditionally, UHECR composition has relied upon comparison of the first and second … Array
hybrid Xmax measurements which is found to agree with a predominantly light composition. …

… Fluorescence detection in monocular mode is less efficient to … events and we compare our
predictions with the hybrid … so far on the mass composition of UHECR is still not conclusive. …

… In this paper we infer the mass composition of the ultra high energy cosmic rays (UHECRs) …
both experiments confirm that the mass composition of the UHECRs is dominated (≳ 70 % ) …

… found in hybrid UHECR observations? We find that a pure proton composition provides
an … which they suggest may form collective modes (or many modes with a tower of masses), …