A compact multi-planet system transiting HIP 29442 (TOI-469) discovered by TESS and ESPRESSO. Radial velocities lead to the detection of transits with low signal-to-noise ratio von Damasso, M, Rodrigues, J, Castro-González, A, Lavie, B, Davoult, J, Zapatero Osorio, MR, Dou, J, Sousa, SG, Owen, JE, Sossi, P, Adibekyan, V, Osborne, H, Leinhardt, Z, Alibert, Y, Lovis, C, Delgado Meña, E, Sozzetti, A, Barros, SCC

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Masses and compositions of three small planets orbiting the nearby M dwarf L231-32 (TOI-270) and the M dwarf radius valley von Van Eylen, V, Astudillo-Defru, N, Bonfils, X, Livingston, J, Hirano, T, Luque, R, Lam, KWF, Justesen, AB, Winn, JN, Gandolfi, D, Nowak, G, Palle, E, Albrecht, S, Dai, F, Estrada, BC, Owen, JE, Foreman-Mackey, D, Fridlund, M, Korth, J, Mathur, S, Forveille, T, Mikal-Evans, T, Osborne, HLM, Ho, CSK, Almenara, JM, Artigau, E, Barragan, O, Barros, SCC, Bouchy, F, Cabrera, J, Caldwell, DA, Charbonneau, D, Chaturvedi, P, Cochran, WD, Csizmadia, S, Damasso, M, Delfosse, X, De Medeiros, JR, Diaz, RF, Doyon, R, Esposito, M, Furesz, G, Figueira, P, Georgieva, I, Goffo, E, Grziwa, S, Guenther, E, Hatzes, AP, Jenkins, JM, Kabath, P, Knudstrup, E, Latham, DW, Lavie, B, Lovis, C, Mennickent, RE, Mullally, SE, Murgas, F, Narita, N, Pepe, FA, Persson, CM, Redfield, S, Ricker, GR, Santos, NC, Seager, S, Serrano, LM, Smith, AMS, Suarez Mascareno, A, Subjak, J, Twicken, JD, Udry, S, Vanderspek, R, Zapatero Osorio, MR

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Multiplicity of very low-mass objects in the Upper Scorpius OB association: a possible wide binary population von Bouy, H., Martín, E. L., Brandner, W., Zapatero-Osorio, M. R., Béjar, V. J. S., Schirmer, M., Huélamo, N., Ghez, A. M.

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The kinematics of very low mass dwarfs: Splinter session summary von Burgasser, A.J., Faherty, J.K., Schmidt, S., West, A.A., Zapatero Osorio, M.R., Pineda, J.S., Burningham, B., Nicholls, C., Sanderson, R., Shkolnik, E., Rodriguez, D., Riedel, A., Joergens, V.

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The extraordinarily bright optical afterglow of GRB 991208 and its host galaxy von Castro-Tirado, A. J., Sokolov, V. V., Gorosabel, J., Castro Cerón, J. M., Greiner, J., Wijers, R. A. M. J., Jensen, B. L., Hjorth, J., Toft, S., Pedersen, H., Palazzi, E., Pian, E., Masetti, N., Sagar, R., Mohan, V., Pandey, A. K., Pandey, S. B., Dodonov, S. N., Fatkhullin, T. A., Afanasiev, V. L., Komarova, V. N., Moiseev, A. V., Hudec, R., Simon, V., Vreeswijk, P., Rol, E., Klose, S., Stecklum, B., Zapatero-Osorio, M. R., Caon, N., Blake, C., Wall, J., Heinlein, D., Henden, A., Benetti, S., Magazzù, A., Ghinassi, F., Tommasi, L., Bremer, M., Kouveliotou, C., Guziy, S., Shlyapnikov, A., Hopp, U., Feulner, G., Dreizler, S., Hartmann, D., Boehnhardt, H., Paredes, J. M., Martí, J., Xanthopoulos, E., Kristen, H. E., Smoker, J., Hurley, K.

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Decay of the GRB 990123 Optical Afterglow: Implications for the Fireball Model von Castro-Tirado, Alberto J., Zapatero-Osorio, María Rosa, Caon, Nicola, Cairós, Luz Marina, Hjorth, Jens, Pedersen, Holger, Andersen, Michael I., Gorosabel, Javier, Bartolini, Corrado, Guarnieri, Adriano, Piccioni, Adalberto, Frontera, Filippo, Masetti, Nicola, Palazzi, Eliana, Pian, Elena, Greiner, Jochen, Hudec, Renè, Sagar, Ram, Pandey, Anil K., Mohan, Vinay, Ramakant K. S. Yadav, Nilakshi, Björnsson, Gunnlaugur, Jakobsson, Páll, Burud, Ingunn, Courbin, Frederic, Valentini, Gaetano, Piersimoni, Anna, Aceituno, Jesús, Montoya, Luz María, Pedraz, Santos, Gredel, Roland, Claver, Charles F., Rector, Travis A., Rhoads, James E., Walter, Fabian, Ott, Jürgen, Hippelein, Hans, Sánchez-Béjar, Victor, Gutiérrez, Carlos, Oscoz, Alejandro, Zhu, Jin, Chen, Jiansheng, Zhang, Haotong, Wei, Jianyan, Zhou, Aiying, Guiziy, Sergei, Shlyapnikov, Aleksei, Heise, John, Costa, Enrico, Feroci, Marco, Piro, Luigi

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An early-time infrared and optical study of the Type Ia Supernova 1998bu in M96 von Hernandez, M., Meikle, W. P. S., Aparicio, A., Benn, C. R., Burleigh, M. R., Chrysostomou, A. C., Fernandes, A. J. L., Geballe, T. R., Hammersley, P. L., Iglesias-Paramo, J., James, D. J., James, P. A., Kemp, S. N., Lister, T. A., Martinez-Delgado, D., Oscoz, A., Pollacco, D. L., Rozas, M., Smartt, S. J., Sorensen, P., Swaters, R. A., Telting, J. H., Vacca, W. D., Walton, N. A., Zapatero-Osorio, M. R.

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The First L-Type Brown Dwarf in the Pleiades von Martín, E. L, Basri, G, Zapatero-Osorio, M. R, Rebolo, R, López, R. J. García

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A New Pleiades Member at the Lithium Substellar Boundary von Martín, E. L, Basri, G, Gallegos, J. E, Rebolo, R, Zapatero-Osorio, M. R, Bejar, V. J. S

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Optical linear polarization in ultra cool dwarfs von Tata, R., Martín, E. L., Sengupta, S., Phan-Bao, N., Zapatero Osorio, M. R., Bouy, H.

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EChO von Beaulieu, JP, Meyer, M, Micela, G, Ribas, I, Krause, O, Ollivier, M, Pace, E, Swinyard, B, Aylward, A, Van Boekel, R, Coradini, A, Encrenaz, T, Snellen, I, Zapatero-Osorio, MR, Bouwman, J, Cho, JY-K, Du Foresto, VC, Guillot, T, Lopez-Morales, M, Selsis, F, Sozzetti, A, Ade, PAR, Achilleos, N, Adriani, A, Agnor, CB, Afonso, C, Allende Prieto, C, Bakos, G, Barlow, M, Batista, V, Bernath, P, Bezard, B, Cassan, A, Cavarroc, C, Ciaravella, A, Cockell, C, Coustenis, A, Decin, L, De Kok, R, Demangeon, O, Deroo, P, Doel, P, Drossart, P, Focardi, M, Forget, F, Fossey, S, Fouque, P, Galand, M, Gaulme, P, Grasset, O, Griffith, CA, Groezinger, U, Guedel, M, Hargreaves, R, Hauschildt, PH, Heng, K, Heyrovsky, D, Hueso, R, Kaltenegger, L, Koskinen, TT, Kovacs, G, La Barbera, A, Leto, G, Lopez Valverde, MA, Lopez-Puertas, M, Lovis, C, Maggio, A, Maldonado Prado, J, Marquette, JB, Martin-Torres, FJ, Maxted, P, Molinari, S, Moro-Martin, A, Moses, JI, Mousis, O, Nguyen Tuong, N, Nelson, R, Pantin, E, Pezzuto, S, Pinfield, D, Poretti, E, Prinja, R, Prisinzano, L, Samuel, B, Sanchez-Lavega, A, Sanz Forcada, J, Sasselov, D, Savini, G, Sicardy, B, Stixrude, L, Strazzulla, G, Tennyson, J, Tessenyi, M, Vasisht, G, Vinatier, S, Waldmann, I, Widemann, T, Yelle, R, Yung, Y, Yurchenko, SN

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The Optical/IR Counterpart of the 1998 July 3 Gamma-Ray Burst and Its Evolution von Castro-Tirado, A. J, Zapatero-Osorio, M. R, Gorosabel, J, Greiner, J, Heidt, J, Herranz, D, Kemp, S. N, Martínez-González, E, Oscoz, A, Ortega, V, Röser, H.-J, Wolf, C, Pedersen, H, Jaunsen, A. O, Korhonen, H, Ilyin, I, Duemmler, R, Andersen, M. I, Hjorth, J, Henden, A. A, Vrba, F. J, Fried, J. W, Frontera, F, Nicastro, L

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The Substellar Population in the Young   Orionis Cluster, Spatial Distribution von Béjar, V.J.S., Caballero, J.A., Rebolo, R., Zapatero Osorio, M.R., Y Navascués, D. Barrado

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Precise mass and radius of a transiting super-Earth planet orbiting the M dwarf TOI-1235: a planet in the radius gap? von Bluhm, P, Luque, R, Espinoza, N, Palle, E, Caballero, JA, Dreizler, S, Livingston, JH, Mathur, S, Quirrenbach, A, Stock, S, Van Eylen, V, Nowak, G, Lopez, E, Csizmadia, S, Zapatero Osorio, MR, Schoefer, P, Lillo-Box, J, Oshagh, M, Gonzalez-Alvarez, E, Amado, PJ, Barrado, D, Bejar, VJS, Cale, B, Chaturvedi, P, Cifuentes, C, Cochran, WD, Collins, KA, Collins, K, Cortes-Contreras, M, Diez Alonso, E, El Mufti, M, Ercolino, A, Fridlund, M, Gaidos, E, Garcia, RA, Georgieva, I, Gonzalez-Cuesta, L, Guerra, P, Hatzes, AP, Henning, T, Herrero, E, Hidalgo, D, Isopi, G, Jeffers, S, Jenkins, JM, Jensen, ELN, Kabath, P, Kaminski, A, Kemmer, J, Korth, J, Kossakowski, D, Kuerster, M, Lafarga, M, Mallia, F, Montes, D, Morales, JC, Morales-Calderon, M, Murgas, F, Narita, N, Passegger, VM, Pedraz, S, Persson, CM, Plavchan, P, Rauer, H, Redfield, S, Reffert, S, Reiners, A, Ribas, I, Ricker, GR, Rodriguez-Lopez, C, Santos, ARG, Seager, S, Schlecker, M, Schweitzer, A, Shan, Y, Soto, MG, Subjak, J, Tal-Or, L, Trifonov, T, Vanaverbeke, S, Vanderspek, R, Wittrock, J, Zechmeister, M, Zohrabi, F

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Hot Subdwarfs: Magnetic, Oscillatory and Other Physical Properties von Oreiro, R, Pérez Hernández, F, Manteiga, M, Ulla, A, González Pérez, Jm, Zapatero Osorio, Mr, GarcÍa López, R, Macdonald, J, Thejll, P, Ferriz-mas, A, Saffer, Ra, Elkin, V

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K2-111: An old system with two planets in near-resonance von Mortier, A, Zapatero Osorio, MR, Malavolta, L, Alibert, Y, Rice, K, Lillo-Box, J, Vanderburg, A, Oshagh, M, Buchhave, L, Adibekyan, V, Delgado Mena, E, Lopez-Morales, M, Charbonneau, D, Sousa, SG, Lovis, C, Affer, L, Allende Prieto, C, Barros, SCC, Benatti, S, Bonomo, AS, Boschin, W, Bouchy, F, Cabral, A, Collier Cameron, A, Cosentino, R, Cristiani, S, Demangeon, ODS, Di Marcantonio, P, D'Odorico, V, Dumusque, X, Ehrenreich, D, Figueira, P, Fiorenzano, A, Ghedina, A, González Hernández, JI, Haldemann, J, Harutyunyan, A, Haywood, RD, Latham, DW, Lavie, B, Lo Curto, G, Maldonado, J, Manescau, A, Martins, CJAP, Mayor, M, Mégevand, D, Mehner, A, Micela, G, Molaro, P, Molinari, E, Nunes, NJ, Pepe, FA, Palle, E, Phillips, D, Piotto, G, Pinamonti, M, Poretti, E, Riva, M, Rebolo, R, Santos, NC, Sasselov, D, Sozzetti, A, Suárez Mascareño, A, Udry, S, West, RG, Watson, CA, Wilson, TG

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The ARIEL space mission von Pascale, E, Bezawada, N, Barstow, J, Beaulieu, JP, Bowles, N, Coudé Du Foresto, V, Coustenis, A, Decin, L, Drossart, P, Eccleston, P, Encrenaz, T, Forget, F, Griffin, M, Güdel, M, Hartogh, P, Heske, A, Lagage, PO, Leconte, J, Malaguti, P, Micela, G, Middleton, K, Min, M, Moneti, A, Morales, JC, Mugnai, L, Ollivier, M, Pace, E, Papageorgiou, A, Pilbratt, G, Puig, L, Rataj, M, Ray, T, Ribas, I, Rocchetto, M, Sarkar, S, Selsis, F, Taylor, W, Tennyson, J, Tinetti, G, Turrini, D, Vandenbussche, B, Venot, O, Waldmann, IP, Wolkenberg, P, Wright, G, Zapatero Osorio, MR, Zingales, T

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Precise mass determination for the keystone sub-Neptune planet transiting the mid-type M dwarf G 9-40 von Luque, R, Nowak, G, Hirano, T, Kossakowski, D, Pallé, E, Nixon, MC, Morello, G, Amado, PJ, Albrecht, SH, Caballero, JA, Cifuentes, C, Cochran, WD, Deeg, HJ, Dreizler, S, Esparza-Borges, E, Fukui, A, Gandolfi, D, Goffo, E, Guenther, EW, Hatzes, AP, Henning, T, Kabath, P, Kawauchi, K, Korth, J, Kotani, T, Kudo, T, Kuzuhara, M, Lafarga, M, Lam, KWF, Livingston, J, Morales, JC, Muresan, A, Murgas, F, Narita, N, Osborne, HLM, Parviainen, H, Passegger, VM, Persson, CM, Quirrenbach, A, Redfield, S, Reffert, S, Reiners, A, Ribas, I, Serrano, LM, Tamura, M, Eylen, V Van, Watanabe, N, Osorio, MR Zapatero

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An optical counterpart to GRB 971227? von Guarnieri, A., Castro-Tirado, A. J., Bartolini, C., Lolli, M., Masetti, N., Piccioni, A., Zavatti, F., Gorosabel, J., Aguilar, Y., Kohley, R., Beskin, G. M., Zapatero-Osorio, M. R., Rebolo, R., Corradi, R., Guerrero, M., Kemp, S., Greiner, J., Dietrich, M., Zickgraf, F. J., Costa, E., Feroci, M., Frontera, F., Piro, L., Nicastro, L., Palazzi, E.

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EChO von Beaulieu, JP, Meyer, M, Micela, G, Ribas, I, Krause, O, Ollivier, M, Pace, E, Swinyard, B, Aylward, A, van Boekel, R, Coradini, A, Encrenaz, T, Snellen, I, Zapatero-Osorio, MR, Bouwman, J, Cho, JY-K, Guillot, T, Lopez-Morales, M, Selsis, F, Sozzetti, A, Ade, PAR, Achilleos, N, Adriani, A, Agnor, CB, Afonso, C, Allende Prieto, C, Bakos, G, Barlow, M, Batista, V, Bernath, P, Bezard, B, Cassan, A, Cavarroc, C, Ciaravella, A, Cockell, C, Coustenis, A, Decin, L, De Kok, R, Demangeon, O, Deroo, P, Doel, P, Drossart, P, Focardi, M, Forget, F, Fossey, S, Fouque, P, Galand, M, Gaulme, P, Grasset, O, Griffith, CA, Groezinger, U, Guedel, M, Hargreaves, R, Hauschildt, PH, Heng, K, Heyrovsky, D, Hueso, R, Irwin, P, Kaltenegger, L, Koskinen, TT, Kovacs, G, La Barbera, A, Leto, G, Lopez Valverde, MA, Lopez-Puertas, M, Lovis, C, Maggio, A, Maldonado Prado, J, Marquette, JB, Martin-Torres, FJ, Maxted, P, Molinari, S, Moro-Martin, A, Moses, JI, Mousis, O, Nguyen Tuong, N, Nelson, R, Pantin, E, Pezzuto, S, Pinfield, D, Poretti, E, Prinja, R, Prisinzano, L, Samuel, B, Sanchez-Lavega, A, Sanz Forcada, J, Sasselov, D, Savini, G, Sicardy, B, Stixrude, L, Strazzulla, G, Tennyson, J, Tessenyi, M, Vasisht, G, Vinatier, S, Waldmann, I, Widemann, T, Yelle, R, Yung, Y, Yurchenko, SN

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