# ICRC2015

July 29, 2015 to August 6, 2015
World Forum
Europe/Amsterdam timezone

## A study of the first harmonic of the large scale anisotropies with the KASCADE-Grande experiment

Jul 30, 2015, 12:00 PM
15m
World Forum Theater (World Forum)

### World Forum Theater

#### World Forum

Churchillplein 10 2517 JW Den Haag The Netherlands
Oral contribution CR-EX

### Speaker

Andrea Chiavassa (Universita di Torino)

### Description

In this contribution we present the results of a search for large scale anisotropies performed, using the East-West method, with the whole data set of the KASCADE-Grande experiment. The counts distribution in sidereal time intervals of 20 minutes, obtained applying the East-West analysis technique (correctly removing instrumental and atmospheric effects), is analyzed in terms of a dipole component. The amplitude obtained with the whole data set has a 3.5 sigma significance, therefore an upper limit is derived: $A<0.47\times10^{-2}$. To investigate a possible variation of the phase of the first harmonic with energy the search has been repeated in shower size intervals. The errors on the phases obtained in all energy intervals are of the order of 20-30 degrees. The phases obtained point at a sky direction that agrees with those measured at lower energies by the EAS-TOP, IceCube and IceTop experiments and at higher energy by the low energy extension of the Pierre Auger Observatory.