\scriptsize
\noindent
F.~Aharonian$^{1,2,3}$, 
F.~Ait~Benkhali$^{4}$, 
A.~Alkan$^{5}$, 
J.~Aschersleben$^{6}$, 
H.~Ashkar$^{7}$, 
M.~Backes$^{8,9}$, 
A.~Baktash$^{10}$, 
V.~Barbosa~Martins$^{11}$, 
A.~Barnacka$^{12}$, 
J.~Barnard$^{13}$, 
R.~Batzofin$^{14}$, 
Y.~Becherini$^{15,16}$, 
G.~Beck$^{17}$, 
D.~Berge$^{11,18}$, 
K.~Bernl\"ohr$^{2}$, 
B.~Bi$^{19}$, 
M.~B\"ottcher$^{9}$, 
C.~Boisson$^{20}$, 
J.~Bolmont$^{21}$, 
M.~de~Bony~de~Lavergne$^{5}$, 
J.~Borowska$^{18}$, 
M.~Bouyahiaoui$^{2}$, 
F.~Bradascio$^{5}$, 
M.~Breuhaus$^{2}$, 
R.~Brose$^{1}$, 
A.~Brown$^{22}$, 
F.~Brun$^{5}$, 
B.~Bruno$^{23}$, 
T.~Bulik$^{24}$, 
C.~Burger-Scheidlin$^{1}$, 
T.~Bylund$^{5}$, 
F.~Cangemi$^{21}$, 
S.~Caroff$^{25}$, 
S.~Casanova$^{26}$, 
R.~Cecil$^{10}$, 
J.~Celic$^{23}$, 
M.~Cerruti$^{15}$, 
P.~Chambery$^{27}$, 
T.~Chand$^{9}$, 
S.~Chandra$^{9}$, 
A.~Chen$^{17}$, 
J.~Chibueze$^{9}$, 
O.~Chibueze$^{9}$, 
T.~Collins$^{28}$, 
G.~Cotter$^{22}$, 
P.~Cristofari$^{20}$, 
J.~Damascene~Mbarubucyeye$^{11}$, 
I.D.~Davids$^{8}$, 
J.~Davies$^{22}$, 
L.~de~Jonge$^{9}$, 
J.~Devin$^{29}$, 
A.~Djannati-Ata\"i$^{15}$, 
A.~Dmytriiev$^{9}$, 
V.~Doroshenko$^{19}$, 
L.~Dreyer$^{9}$, 
L.~Du~Plessis$^{9}$, 
K.~Egberts$^{14}$, 
S.~Einecke$^{28}$, 
J.-P.~Ernenwein$^{30}$, 
S.~Fegan$^{7}$, 
K.~Feijen$^{15}$, 
G.~Fichet~de~Clairfontaine$^{20}$, 
G.~Fontaine$^{7}$, 
F.~Lott$^{8}$, 
M.~F\"u{\ss}ling$^{11}$, 
S.~Funk$^{23}$, 
S.~Gabici$^{15}$, 
Y.A.~Gallant$^{29}$, 
S.~Ghafourizadeh$^{4}$, 
G.~Giavitto$^{11}$, 
L.~Giunti$^{15,5}$, 
D.~Glawion$^{23}$, 
J.F.~Glicenstein$^{5}$, 
J.~Glombitza$^{23}$, 
P.~Goswami$^{15}$, 
G.~Grolleron$^{21}$, 
M.-H.~Grondin$^{27}$, 
L.~Haerer$^{2}$, 
S.~Hattingh$^{9}$, 
M.~Haupt$^{11}$, 
G.~Hermann$^{2}$, 
J.A.~Hinton$^{2}$, 
W.~Hofmann$^{2}$, 
T.~L.~Holch$^{11}$, 
M.~Holler$^{31}$, 
D.~Horns$^{10}$, 
Zhiqiu~Huang$^{2}$, 
A.~Jaitly$^{11}$, 
M.~Jamrozy$^{12}$, 
F.~Jankowsky$^{4}$, 
A.~Jardin-Blicq$^{27}$, 
V.~Joshi$^{23}$, 
I.~Jung-Richardt$^{23}$, 
E.~Kasai$^{8}$, 
K.~Katarzy{\'n}ski$^{32}$, 
H.~Katjaita$^{8}$, 
D.~Khangulyan$^{33}$, 
R.~Khatoon$^{9}$, 
B.~Kh\'elifi$^{15}$, 
S.~Klepser$^{11}$, 
W.~Klu\'{z}niak$^{34}$, 
Nu.~Komin$^{17}$, 
R.~Konno$^{11}$, 
K.~Kosack$^{5}$, 
D.~Kostunin$^{11}$, 
A.~Kundu$^{9}$, 
G.~Lamanna$^{25}$, 
R.G.~Lang$^{23}$, 
S.~Le~Stum$^{30}$, 
V.~Lefranc$^{5}$, 
F.~Leitl$^{23}$, 
A.~Lemi\`ere$^{15}$, 
M.~Lemoine-Goumard$^{27}$, 
J.-P.~Lenain$^{21}$, 
F.~Leuschner$^{19}$, 
A.~Luashvili$^{20}$, 
I.~Lypova$^{4}$, 
J.~Mackey$^{1}$, 
D.~Malyshev$^{19}$, 
D.~Malyshev$^{23}$, 
V.~Marandon$^{5}$, 
A.~Marcowith$^{29}$, 
P.~Marinos$^{28}$, 
G.~Mart\'i-Devesa$^{31}$, 
R.~Marx$^{4}$, 
G.~Maurin$^{25}$, 
A.~Mehta$^{11}$, 
P.J.~Meintjes$^{13}$, 
M.~Meyer$^{10}$, 
A.~Mitchell$^{23}$, 
R.~Moderski$^{34}$, 
L.~Mohrmann$^{2}$, 
A.~Montanari$^{4}$, 
C.~Moore$^{35}$, 
E.~Moulin$^{5}$, 
T.~Murach$^{11}$, 
K.~Nakashima$^{23}$, 
M.~de~Naurois$^{7}$, 
H.~Ndiyavala$^{8,9}$, 
J.~Niemiec$^{26}$, 
A.~Priyana~Noel$^{12}$, 
P.~O'Brien$^{35}$, 
S.~Ohm$^{11}$, 
L.~Olivera-Nieto$^{2}$, 
E.~de~Ona~Wilhelmi$^{11}$, 
M.~Ostrowski$^{12}$, 
E.~Oukacha$^{15}$, 
S.~Panny$^{31}$, 
M.~Panter$^{2}$, 
R.D.~Parsons$^{18}$, 
U.~Pensec$^{21}$, 
G.~Peron$^{15}$, 
S.~Pita$^{15}$, 
V.~Poireau$^{25}$, 
D.A.~Prokhorov$^{36}$, 
H.~Prokoph$^{11}$, 
G.~P\"uhlhofer$^{19}$, 
M.~Punch$^{15}$, 
A.~Quirrenbach$^{4}$, 
M.~Regeard$^{15}$, 
P.~Reichherzer$^{5}$, 
A.~Reimer$^{31}$, 
O.~Reimer$^{31}$, 
I.~Reis$^{5}$, 
Q.~Remy$^{2}$, 
H.~Ren$^{2}$, 
M.~Renaud$^{29}$, 
B.~Reville$^{2}$, 
F.~Rieger$^{2}$, 
G.~Roellinghoff$^{23}$, 
E.~Rol$^{36}$, 
G.~Rowell$^{28}$, 
B.~Rudak$^{34}$, 
H.~Rueda Ricarte$^{5}$, 
E.~Ruiz-Velasco$^{2}$, 
K.~Sabri$^{29}$, 
V.~Sahakian$^{3}$, 
S.~Sailer$^{2}$, 
H.~Salzmann$^{19}$, 
D.A.~Sanchez$^{25}$, 
A.~Santangelo$^{19}$, 
M.~Sasaki$^{23}$, 
J.~Sch\"afer$^{23}$, 
F.~Sch\"ussler$^{5}$, 
H.M.~Schutte$^{9}$, 
M.~Senniappan$^{16}$, 
J.N.S.~Shapopi$^{8}$, 
S.~Shilunga$^{8}$, 
K.~Shiningayamwe$^{8}$, 
H.~Sol$^{20}$, 
H.~Spackman$^{22}$, 
A.~Specovius$^{23}$, 
S.~Spencer$^{23}$, 
{\L.}~Stawarz$^{12}$, 
R.~Steenkamp$^{8}$, 
C.~Stegmann$^{14,11}$, 
S.~Steinmassl$^{2}$, 
C.~Steppa$^{14}$, 
K.~Streil$^{23}$, 
I.~Sushch$^{9}$, 
H.~Suzuki$^{37}$, 
T.~Takahashi$^{38}$, 
T.~Tanaka$^{37}$, 
T.~Tavernier$^{5}$, 
A.M.~Taylor$^{11}$, 
R.~Terrier$^{15}$, 
A.~Thakur$^{28}$, 
J.~H.E.~Thiersen$^{9}$, 
C.~Thorpe-Morgan$^{19}$, 
M.~Tluczykont$^{10}$, 
M.~Tsirou$^{11}$, 
N.~Tsuji$^{39}$, 
R.~Tuffs$^{2}$, 
Y.~Uchiyama$^{33}$, 
M.~Ullmo$^{5}$, 
T.~Unbehaun$^{23}$, 
P.~van~der~Merwe$^{9}$, 
C.~van~Eldik$^{23}$, 
B.~van~Soelen$^{13}$, 
G.~Vasileiadis$^{29}$, 
M.~Vecchi$^{6}$, 
J.~Veh$^{23}$, 
C.~Venter$^{9}$, 
J.~Vink$^{36}$, 
H.J.~V\"olk$^{2}$, 
N.~Vogel$^{23}$, 
T.~Wach$^{23}$, 
S.J.~Wagner$^{4}$, 
F.~Werner$^{2}$, 
R.~White$^{2}$, 
A.~Wierzcholska$^{26}$, 
Yu~Wun~Wong$^{23}$, 
H.~Yassin$^{9}$, 
M.~Zacharias$^{4,9}$, 
D.~Zargaryan$^{1}$, 
A.A.~Zdziarski$^{34}$, 
A.~Zech$^{20}$, 
S.J.~Zhu$^{11}$, 
A.~Zmija$^{23}$, 
S.~Zouari$^{15}$ and 
N.~\.Zywucka$^{9}$.

\medskip


\noindent
$^{1}$Dublin Institute for Advanced Studies, 31 Fitzwilliam Place, Dublin 2, Ireland\\
$^{2}$Max-Planck-Institut f\"ur Kernphysik, P.O. Box 103980, D 69029 Heidelberg, Germany\\
$^{3}$Yerevan State University,  1 Alek Manukyan St, Yerevan 0025, Armenia\\
$^{4}$Landessternwarte, Universit\"at Heidelberg, K\"onigstuhl, D 69117 Heidelberg, Germany\\
$^{5}$IRFU, CEA, Universit\'e Paris-Saclay, F-91191 Gif-sur-Yvette, France\\
$^{6}$Kapteyn Astronomical Institute, University of Groningen, Landleven 12, 9747 AD Groningen, The Netherlands\\
$^{7}$Laboratoire Leprince-Ringuet, École Polytechnique, CNRS, Institut Polytechnique de Paris, F-91128 Palaiseau, France\\
$^{8}$University of Namibia, Department of Physics, Private Bag 13301, Windhoek 10005, Namibia\\
$^{9}$Centre for Space Research, North-West University, Potchefstroom 2520, South Africa\\
$^{10}$Universit\"at Hamburg, Institut f\"ur Experimentalphysik, Luruper Chaussee 149, D 22761 Hamburg, Germany\\
$^{11}$DESY, D-15738 Zeuthen, Germany\\
$^{12}$Obserwatorium Astronomiczne, Uniwersytet Jagiello{\'n}ski, ul. Orla 171, 30-244 Krak{\'o}w, Poland\\
$^{13}$Department of Physics, University of the Free State,  PO Box 339, Bloemfontein 9300, South Africa\\
$^{14}$Institut f\"ur Physik und Astronomie, Universit\"at Potsdam,  Karl-Liebknecht-Strasse 24/25, D 14476 Potsdam, Germany\\
$^{15}$Université de Paris, CNRS, Astroparticule et Cosmologie, F-75013 Paris, France\\
$^{16}$Department of Physics and Electrical Engineering, Linnaeus University,  351 95 V\"axj\"o, Sweden\\
$^{17}$School of Physics, University of the Witwatersrand, 1 Jan Smuts Avenue, Braamfontein, Johannesburg, 2050 South Africa\\
$^{18}$Institut f\"ur Physik, Humboldt-Universit\"at zu Berlin, Newtonstr. 15, D 12489 Berlin, Germany\\
$^{19}$Institut f\"ur Astronomie und Astrophysik, Universit\"at T\"ubingen, Sand 1, D 72076 T\"ubingen, Germany\\
$^{20}$Laboratoire Univers et Théories, Observatoire de Paris, Université PSL, CNRS, Université de Paris, 92190 Meudon, France\\
$^{21}$Sorbonne Universit\'e, Universit\'e Paris Diderot, Sorbonne Paris Cit\'e, CNRS/IN2P3, Laboratoire de Physique Nucl\'eaire et de Hautes Energies, LPNHE, 4 Place Jussieu, F-75252 Paris, France\\
$^{22}$University of Oxford, Department of Physics, Denys Wilkinson Building, Keble Road, Oxford OX1 3RH, UK\\
$^{23}$Friedrich-Alexander-Universit\"at Erlangen-N\"urnberg, Erlangen Centre for Astroparticle Physics, Nikolaus-Fiebiger-Str. 2, D 91058 Erlangen, Germany\\
$^{24}$Astronomical Observatory, The University of Warsaw, Al. Ujazdowskie 4, 00-478 Warsaw, Poland\\
$^{25}$Université Savoie Mont Blanc, CNRS, Laboratoire d'Annecy de Physique des Particules - IN2P3, 74000 Annecy, France\\
$^{26}$Instytut Fizyki J\c{a}drowej PAN, ul. Radzikowskiego 152, 31-342 Krak{\'o}w, Poland\\
$^{27}$Universit\'e Bordeaux, CNRS, LP2I Bordeaux, UMR 5797, F-33170 Gradignan, France\\
$^{28}$School of Physical Sciences, University of Adelaide, Adelaide 5005, Australia\\
$^{29}$Laboratoire Univers et Particules de Montpellier, Universit\'e Montpellier, CNRS/IN2P3,  CC 72, Place Eug\`ene Bataillon, F-34095 Montpellier Cedex 5, France\\
$^{30}$Aix Marseille Universit\'e, CNRS/IN2P3, CPPM, Marseille, France\\
$^{31}$Leopold-Franzens-Universit\"at Innsbruck, Institut f\"ur Astro- und Teilchenphysik, A-6020 Innsbruck, Austria\\
$^{32}$Institute of Astronomy, Faculty of Physics, Astronomy and Informatics, Nicolaus Copernicus University,  Grudziadzka 5, 87-100 Torun, Poland\\
$^{33}$Department of Physics, Rikkyo University, 3-34-1 Nishi-Ikebukuro, Toshima-ku, Tokyo 171-8501, Japan\\
$^{34}$Nicolaus Copernicus Astronomical Center, Polish Academy of Sciences, ul. Bartycka 18, 00-716 Warsaw, Poland\\
$^{35}$Department of Physics and Astronomy, The University of Leicester, University Road, Leicester, LE1 7RH, United Kingdom\\
$^{36}$GRAPPA, Anton Pannekoek Institute for Astronomy, University of Amsterdam,  Science Park 904, 1098 XH Amsterdam, The Netherlands\\
$^{37}$Department of Physics, Konan University, 8-9-1 Okamoto, Higashinada, Kobe, Hyogo 658-8501, Japan\\
$^{38}$Kavli Institute for the Physics and Mathematics of the Universe (WPI), The University of Tokyo Institutes for Advanced Study (UTIAS), The University of Tokyo, 5-1-5 Kashiwa-no-Ha, Kashiwa, Chiba, 277-8583, Japan\\
$^{39}$RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan\\
