- collaboration, G
- Agostini, M
- Balata, M
- D'Andrea, V
- di Vacri, A
- Ioannucci, L
- Junker, M
- Laubenstein, M
- Macolino, C
- Pandola, L
- Borowicz, D
- Frodyma, N
- Misiaszek, M
- Panas, K
- Pelczar, K
- Wojcik, M
- Zuzel, G
- Allardt, M
- Barros, N
- Domula, A
- Lehnert, B
- Schneider, B
- Wester, T
- Wilsenach, H
- Zuber, K
- Borowicz, D
- Brudanin, V
- Egorov, V
- Gusev, K
- Klimenko, A
- Kochetov, O
- Lubashevskiy, A
- Nemchenok, I
- Rumyantseva, N
- Shevchik, E
- Shirchenko, M
- Zhitnikov, I
- Zinatulina, D
- Hult, M
- Lutter, G
- Bauer, C
- Gangapshev, A
- Heisel, M
- Hofmann, W
- Kihm, T
- Kirsch, A
- Klimenko, A
- Knöpfle, KT
- Lindner, M
- Maneschg, W
- Salathe, M
- Schreiner, J
- Schwingenheuer, B
- Simgen, H
- Smolnikov, A
- Stepaniuk, M
- Strecker, H
- Wagner, V
- Wegmann, A
- Bellotti, E
- Bellotti, E
- Cattadori, C
- Pullia, A
- Riboldi, S
- Barabanov, I
- Belogurov, S
- Bezrukov, L
- Doroshkevich, E
- Fedorova, O
- Gangapshev, A
- Gurentsov, V
- Inzhechik, LV
- Kazalov, V
- Kornoukhov, VN
- Kuzminov, VV
- Lubsandorzhiev, B
- Moseev, P
- Selivanenko, O
- Veresnikova, A
- Yanovich, E
- Belogurov, S
- Chernogorov, A
- Demidova, EV
- Kirpichnikov, IV
- Kornoukhov, VN
- Vasenko, AA
- Bakalyarov, AM
- Belyaev, ST
- Gusev, K
- Lebedev, VI
- Shirchenko, M
- Zhukov, SV
- Becerici-Schmidt, N
- Caldwell, A
- Liao, HY
- Majorovits, B
- Palioselitis, D
- Schulz, O
- Vanhoefer, L
- et al.
The GERDA experiment at LNGS of INFN is equipped with an active muon veto. The main part of the system is a water Cherenkov veto with 66 PMTs in the water tank surrounding the GERDA cryostat. The muon flux recorded by this veto shows a seasonal modulation. Two causes have been identified: (i) secondary muons from the CNGS neutrino beam (2.2%) and (ii) a temperature modulation of the atmosphere (1.4%). A mean cosmic muon rate of I =(3.477±0.002 ±0.067 )×10 /(s · m ) was found in good agreement with other experiments at LNGS. Combining the present result with those from previous experiments at LNGS the effective temperature coefficient α is determined to 0.93 ± 0.03. A fit of the temperature coefficients measured at various underground sites yields a kaon to pion ratio r of 0.10 ± 0.03. μ stat sys T,Lngs K/π 0 −4 2
