Andrew Levan, Benjamin P Gompertz, Om Sharan Salafia, Mattia Bulla, Eric Burns, Kenta Hotokezaka, Luca Izzo, Gavin P Lamb, Daniele B Malesani, Samantha R Oates, Maria Edvige Ravasio, Alicia Rouco Escorial, Benjamin Schneider, Nikhil Sarin, Steve Schulze, Nial R Tanvir, Kendall Ackley, Gemma Anderson, Gabriel B Brammer, Lise Christensen, Vikram S Dhillon, Phil A Evans, Michael Fausnaugh, Wen-Fai Fong, Andrew S Fruchter, Chris Fryer, Johan P U Fynbo, Nicola Gaspari, Kasper E Heintz, Jens Hjorth, Jamie A Kennea, Mark R Kennedy, Tanmoy Laskar, Giorgos Leloudas, Ilya Mandel, Antonio Martin-Carrillo, Brian D Metzger, Matt Nicholl, Anya Nugent, Jesse T Palmerio, Giovanna Pugliese, Jillian Rastinejad, Lauren Rhodes, Andrea Rossi, Andrea Saccardi, Stephen J Smartt, Heloise F Stevance, Aaron Tohuvavohu, Alexander van der Horst, Susanna D Vergani, Darach Watson, Thomas Barclay, Kornpob Bhirombhakdi, Elmé Breedt, Alice A Breeveld, Alexander J Brown, Sergio Campana, Ashley A Chrimes, Paolo D'Avanzo, Valerio D'Elia, Massimiliano De Pasquale, Martin J Dyer, Duncan K Galloway, James A Garbutt, Matthew J Green, Dieter H Hartmann, Páll Jakobsson, Paul Kerry, Chryssa Kouveliotou, Danial Langeroodi, Emeric Le Floc'h, James K Leung, Stuart P Littlefair, James Munday, Paul O'Brien, Steven G Parsons, Ingrid Pelisoli, David I Sahman, Ruben Salvaterra, Boris Sbarufatti, Danny Steeghs, Gianpiero Tagliaferri, Christina C Thöne, Antonio de Ugarte Postigo, David Alexander Kann
The mergers of binary compact objects such as neutron stars and black holes are of central interest to several areas of astrophysics, including as the progenitors of gamma-ray bursts (GRBs)1 , sources of high-frequency gravitational waves (GW)2 and likely production sites for heavy element nucleosynthesis via rapid neutron capture (the r-process)3 . Here we present observations of the exceptionally bright gamma-ray burst GRB 230307A. We show that GRB 230307A belongs to the class of long-duration gamma-ray bursts associated with compact object mergers4-6 , and contains a kilonova similar to AT2017gfo, associated with the gravitational-wave merger GW1708177-12 ...
October 25, 2023: Nature