A joint effort to discover and characterize two resonant mini-Neptunes around TOI-1803 with TESS, HARPS-N, and CHEOPS

Zingales, T. and Malavolta, L. and Borsato, L. and Turrini, D. and Bonfanti, A. and Polychroni, D. and Mantovan, G. and Nardiello, D. and Nascimbeni, V. and Lanza, A. F. and Bekkelien, A. and Sozzetti, A. and Broeg, C. and Naponiello, L. and Lendl, M. and Bonomo, A. S. and Simon, A. E. and Desidera, S. and Piotto, G. and Mancini, L. and Hooton, M. J. and Bignamini, A. and Egger, J. A. and Maggio, A. and Alibert, Y. and Locci, D. and Delrez, L. and Biassoni, F. and Fossati, L. and Cabona, L. and Lacedelli, G. and Carleo, I. and Leonardi, P. and Andreuzzi, G. and Brandeker, A. and Cosentino, R. and Correia, A. C. M. and Claudi, R. and Alonso, R. and Damasso, M. and Wilson, T. G. and Bárczy, T. and Pinamonti, M. and Baker, D. and Barkaoui, K. and Barrado Navascues, D. and Barros, S. C. C. and Baumjohann, W. and Beck, T. and Beichman, C. and Benz, W. and Bieryla, A. and Billot, N. and Bosch-Cabot, P. and Bouma, L. G. and Ciardi, D. R. and Collier Cameron, A. and Collins, K. A. and Crossfield, Ian J. M. and Csizmadia, Sz. and Cubillos, P. E. and Davies, M. B. and Deleuil, M. and Deline, A. and Demangeon, O. D. S. and Demory, B. -O. and Derekas, A. and Dragomir, D. and Edwards, B. and Ehrenreich, D. and Erikson, A. and Falk, B. and Fortier, A. and Fridlund, M. and Fukui, A. and Gandolfi, D. and Gazeas, K. and Gillon, M. and Gonzales, E. and Güdel, M. and Guerra, P. and Günther, M. N. and Heitzmann, A. and Helling, Ch. and Howell, S. B. and Isaak, K. G. and Jenkins, J. and Kiss, L. L. and Korth, J. and Lam, K. W. F. and Laskar, J. and Lecavelier des Etangs, A. and Magrin, D. and Matson, R. and Matthews, E. C. and Maxted, P. F. L. and McDermott, S. and Munari, M. and Mordasini, C. and Narita, N. and Olofsson, G. and Ottensamer, R. and Pagano, I. and Pallé, E. and Peter, G. and Pollacco, D. and Queloz, D. and Ragazzoni, R. and Rando, N. and Ratti, F. and Rauer, H. and Ribas, I. and Salmon, S. and Santos, N. C. and Scandariato, G. and Seager, S. and Ségransan, D. and Smith, A. M. S. and Schlieder, J. and Schwarz, R. P. and Shporer, A. and Sousa, S. G. and Stalport, M. and Steinberger, M. and Sulis, S. and Szabó, Gy. M. and Twicken, J. D. and Udry, S. and Van Grootel, V. and Venturini, J. and Villaver, E. and Walton, N. A. and Winn, J. N.

A&A