doi:10.1016/j.astropartphys.2025.103135engSoleti, S.R.Gómez-Cadenas, J.J.Apilluelo, J.Asquith, L.Bannister, E.F.Barradas, N.P.Baylis, C.L.Beney, J.L.e Santos, M. Berberande la Bernardie, X.Bezerra, T.J.C.Bongrand, M.Bourgeois, C.Breton, D.Busto, J.Burns, K.Cabrera, A.Cadiou, A.Calvo, E.de Carlos Generowicz, M.Chauveau, E.Cattermole, B.J.Chen, M.Chimenti, P.Cowen, D.F.Das, S.Kr.Dusini, S.Earle, A.Felizardo, M.Martins, C. FrigerioGalán, J.García, J.A.Gazzini, R.Gibson-Foster, A.Girard-Carillo, C.Griffith, W.C.Guitière, M.Haddad, F.Hartnell, J.Holin, A.Irastorza, I.G.Jovanovic, I.Kling, A.Koch, L.Lasorak, P.Le Du, J.F.Lefevre, F.Loaiza, P.Lock, J.A.Luzón, G.Maalmi, J.Malhado, J.P.Mantovani, F.Marques, J.G.Marquet, C.Martínez, M.Navas-Nicolás, D.Nunokawa, H.Ochoa-Ricoux, J.P.Palmeira, T.Palomares, C.Petyt, D.Pillot, P.Pin, A.Porter, J.C.C.Pravikoff, M.S.Richards, S.Rodrigues, N.Roche, M.Rosero, R.Roskovec, B.Roy, N.Sarsa, M.L.Serafini, A.Shepherd-Themistocleous, C.Shorrock, W.Silva, M.Simard, L.Stocco, D.Strati, V.Stutzmann, J.S.Suekane, F.Tuccori, N.Verdugo, A.Viaud, B.Wakely, S.M.Wendel, G.Wilhelm, A.S.Wong, A.W.R.Yeh, M.Yermia, F.COCOA: A compact Compton camera for astrophysical observation of MeV-scale gamma raysART-2025-144326COCOA (COmpact COmpton cAmera) is a next-generation gamma-ray telescope designed for astrophysical observations in the MeV energy range. The detector comprises a scatterer volume employing the LiquidO detection technology and an array of scintillating crystals acting as absorber. Surrounding plastic scintillator panels serve as a veto system for charged particles. The detector’s compact, scalable design enables flexible deployment on microsatellites or high-altitude balloons. Gamma rays at MeV energies have not been well explored historically (the so-called “MeV gap”) and COCOA has the potential to improve the sensitivity in this energy band.2025http://zaguan.unizar.es/record/16167510.1016/j.astropartphys.2025.103135http://zaguan.unizar.es/record/161675oai:zaguan.unizar.es:161675Astroparticle Physics 172 (2025), 103135 [12 pp.]byhttps://creativecommons.org/licenses/by/4.0/deed.esinfo:eu-repo/semantics/openAccess