Observation of Gravitational Waves from the Coalescence of a 2.5–4.5 M⊙ Compact Object and a Neutron Star

Abac, A. G.; Abbott, R.; Abouelfettouh, I.; Acernese, F.; Ackley, K.; Adhicary, S.; Adhikari, N.; Adhikari, R. X.; Adkins, V. K.; Agarwal, D.; Agathos, M.; Aghaei Abchouyeh, M.; Aguiar, O. D.; Aguilar, I.; Aiello, L.; Ain, A.; Ajith, P.; Akçay, S.; Akutsu, T.; Albanesi, S.; Alfaidi, R. A.; Al-Jodah, A.; Alléné, C.; Allocca, A.; Al-Shammari, S.; Altin, P. A.; Alvarez-Lopez, S.; Amato, A.; Amez-Droz, L.; Amorosi, A.; Amra, C.; Ananyeva, A.; Anderson, S. B.; Anderson, W. G.; Andia, M.; Ando, M.; Andrade, T.; Andres, N.; Andrés-Carcasona, M.; Andrić, T.; Anglin, J.; Ansoldi, S.; Antelis, J. M.; Antier, S.; Aoumi, M.; Appavuravther, E. Z.; Appert, S.; Apple, S. K.; Arai, K.; Araya, A.; Araya, M. C.; Areeda, J. S.; Argianas, L.; Aritomi, N.; Armato, F.; Arnaud, N.; Arogeti, M.; Aronson, S. M.; Arun, K. G.; Ashton, G.; Aso, Y.; Assiduo, M.; Assis de Souza Melo, S.; Aston, S. M.; Astone, P.; Attadio, F.; Aubin, F.; AultONeal, K.; Avallone, G.; Azrad, D.; Babak, S.; Badaracco, F.; Badger, C.; Bae, S.; Bagnasco, S.; Bagui, E.; Baier, J. G.; Baiotti, L.; Bajpai, R.; Baka, T.; Ball, M.; Ballardin, G.; Ballmer, S. W.; Banagiri, S.; Banerjee, B.; Bankar, D.; Baral, P.; Barayoga, J. C.; Barish, B. C.; Barker, D.; Barneo, P.; Barone, F.; Barr, B.; Barsotti, L.; Barsuglia, M.; Barta, D.; Bartoletti, A. M.; Barton, M. A.; Bartos, I.; Basak, S.; Basalaev, A.; Bassiri, R.; Basti, A.; Bates, D. E.; Bawaj, M.; Baxi, P.; Bayley, J. C.; Baylor, A. C.; Baynard, P. A.; Bazzan, M.; Bedakihale, V. M.; Beirnaert, F.; Bejger, M.; Belardinelli, D.; Bell, A. S.; Benedetto, V.; Benoit, W.; Bentara, I.; Bentley, J. D.; Ben Yaala, M.; Bera, S.; Berbel, M.; Bergamin, F.; Berger, B. K.; Bernuzzi, S.; Beroiz, M.; Berry, C. P. L.; Bersanetti, D.; Bertolini, A.; Betzwieser, J.; Beveridge, D.; Bevins, N.; Bhandare, R.; Bhardwaj, U.; Bhatt, R.; Bhattacharjee, D.; Bhaumik, S.; Bhowmick, S.; Bianchi, A.; Bilenko, I. A.; Billingsley, G.; Binetti, A.; Bini, S.; Birnholtz, O.; Biscoveanu, S.; Bisht, A.; Bitossi, M.; Bizouard, M.-A.; Blackburn, J. K.; Blagg, L. A.; Blair, C. D.; Blair, D. G.; Bobba, F.; Bode, N.; Boileau, G.; Boldrini, M.; Bolingbroke, G. N.; Bolliand, A.; Bonavena, L. D.; Bondarescu, R.; Bondu, F.; Bonilla, E.; Bonilla, M. S.; Bonino, A.; Bonnand, R.; Booker, P.; Borchers, A.; Boschi, V.; Bose, S.; Bossilkov, V.; Boudart, V.; Boudon, A.; Bozzi, A.; Bradaschia, C.; Brady, P. R.; Braglia, M.; Branch, A.; Branchesi, M.; Brandt, J.; Braun, I.; Breschi, M.; Briant, T.; Brillet, A.; Brinkmann, M.; Brockill, P.; Brockmueller, E.; Brooks, A. F.; Brown, B. C.; Brown, D. D.; Brozzetti, M. L.; Brunett, S.; Bruno, G.; Bruntz, R.; Bryant, J.; Bucci, F.; Buchanan, J.; Bulashenko, O.; Bulik, T.; Bulten, H. J.; Buonanno, A.; Burtnyk, K.; Buscicchio, R.; Buskulic, D.; Buy, C.; Byer, R. L.; Cabourn Davies, G. S.; Cabras, G.; Cabrita, R.; Cáceres-Barbosa, V.; Cadonati, L.; Cagnoli, G.; Cahillane, C.; Calderón Bustillo, J.; Callister, T. A.; Calloni, E.; Camp, J. B.; Canepa, M.; Caneva Santoro, G.; Cannon, K. C.; Cao, H.; Capistran, L. A.; Capocasa, E.; Capote, E.; Carapella, G.; Carbognani, F.; Carlassara, M.; Carlin, J. B.; Carpinelli, M.; Carrillo, G.; Carter, J. J.; Carullo, G.; Casanueva Diaz, J.; Casentini, C.; Castro-Lucas, S. Y.; Caudill, S.; Cavaglià, M.; Cavalieri, R.; Cella, G.; Cerdá-Durán, P.; Cesarini, E.; Chaibi, W.; Chakraborty, P.; Chalathadka Subrahmanya, S.; Chan, J. C. L.; Chan, M.; Chandra, K.; Chang, R.-J.; Chao, S.; Char, P.; Charlton, E. L.; Charlton, P.; Chassande-Mottin, E.; Chatterjee, C.; Chatterjee, Debarati; Chatterjee, Deep; Chattopadhyay, D.; Chaturvedi, M.; Chaty, S.; Chatziioannou, K.; Chen, A.; Chen, A. H.-Y.; Chen, D.; Chen, H.; Chen, H. Y.; Chen, J.; Chen, K. H.; Chen, Y.; Chen, Yanbei; Chen, Yitian; Cheng, H. P.; Chessa, P.; Cheung, H. T.; Cheung, S. Y.; Chiadini, F.; Chiarini, G.; Chierici, R.; Chincarini, A.; Chiofalo, M. L.; Chiummo, A.; Chou, C.; Choudhary, S.; Christensen, N.; Chua, S. S. Y.; Chugh, P.; Ciani, G.; Ciecielag, P.; Cieślar, M.; Cifaldi, M.; Ciolfi, R.; Clara, F.; Clark, J. A.; Clarke, J.; Clarke, T. A.; Clearwater, P.; Clesse, S.; Coccia, E.; Codazzo, E.; Cohadon, P.-F.; Colace, S.; Colleoni, M.; Collette, C. G.; Collins, J.; Colloms, S.; Colombo, A.; Colpi, M.; Compton, C. M.; Connolly, G.; Conti, L.; Corbitt, T. R.; Cordero-Carrión, I.; Corezzi, S.; Cornish, N. J.; Corsi, A.; Cortese, S.; Costa, C. A.; Cottingham, R.; Coughlin, M. W.; Couineaux, A.; Coulon, J.-P.; Countryman, S. T.; Coupechoux, J.-F.; Couvares, P.; Coward, D. M.; Cowart, M. J.; Coyne, R.; Craig, K.; Creed, R.; Creighton, J. D. E.; Creighton, T. D.; Cremonese, P.; Criswell, A. W.; Crockett-Gray, J. C. G.; Crook, S.; Crouch, R.; Csizmazia, J.; Cudell, J. R.; Cullen, T. J.; Cumming, A.; Cuoco, E.; Cusinato, M.; Dabadie, P.; Dal Canton, T.; Dall'Osso, S.; Dal Pra, S.; Dálya, G.; D'Angelo, B.; Danilishin, S.; D'Antonio, S.; Danzmann, K.; Darroch, K. E.; Dartez, L. P.; Dasgupta, A.; Datta, S.; Dattilo, V.; Daumas, A.; Davari, N.; Dave, I.; Davenport, A.; Davier, M.; Davies, T. F.; Davis, D.; Davis, L.; Davis, M. C.; Davis, P. J.; Dax, M.; De Bolle, J.; Deenadayalan, M.; Degallaix, J.; De Laurentis, M.; Deléglise, S.; De Lillo, F.; Dell'Aquila, D.; Del Pozzo, W.; De Marco, F.; De Matteis, F.; D'Emilio, V.; Demos, N.; Dent, T.; Depasse, A.; DePergola, N.; De Pietri, R.; De Rosa, R.; De Rossi, C.; DeSalvo, R.; De Simone, R.; Dhani, A.; Diab, R.; Díaz, M. C.; Di Cesare, M.; Dideron, G.; Didio, N. A.; Dietrich, T.; Di Fiore, L.; Di Fronzo, C.; Di Giovanni, M.; Di Girolamo, T.; Diksha, D.; Di Michele, A.; Ding, J.; Di Pace, S.; Di Palma, I.; Di Renzo, F.; Divyajyoti; Dmitriev, A.; Doctor, Z.; Dohmen, E.; Doleva, P. P.; Dominguez, D.; D'Onofrio, L.; Donovan, F.; Dooley, K. L.; Dooney, T.; Doravari, S.; Dorosh, O.; Drago, M.; Driggers, J. C.; Ducoin, J.-G.; Dunn, L.; Dupletsa, U.; D'Urso, D.; Duval, H.; Duverne, P.-A.; Dwyer, S. E.; Eassa, C.; Ebersold, M.; Eckhardt, T.; Eddolls, G.; Edelman, B.; Edo, T. B.; Edy, O.; Effler, A.; Eichholz, J.; Einsle, H.; Eisenmann, M.; Eisenstein, R. A.; Ejlli, A.; Eleveld, R. M.; Emma, M.; Endo, K.; Engl, A. J.; Enloe, E.; Errico, L.; Essick, R. C.; Estellés, H.; Estevez, D.; Etzel, T.; Evans, M.; Evstafyeva, T.; Ewing, B. E.; Ezquiaga, J. M.; Fabrizi, F.; Faedi, F.; Fafone, V.; Fairhurst, S.; Farah, A. M.; Farr, B.; Farr, W. M.; Favaro, G.; Favata, M.; Fays, M.; Fazio, M.; Feicht, J.; Fejer, M. M.; Felicetti, R. .; Fenyvesi, E.; Ferguson, D. L.; Ferraiuolo, S.; Ferrante, I.; Ferreira, T. A.; Fidecaro, F.; Figura, P.; Fiori, A.; Fiori, I.; Fishbach, M.; Fisher, R. P.; Fittipaldi, R.; Fiumara, V.; Flaminio, R.; Fleischer, S. M.; Fleming, L. S.; Floden, E.; Foley, E. M.; Fong, H.; Font, J. A.; Fornal, B.; Forsyth, P. W. F.; Franceschetti, K.; Franchini, N.; Frasca, S.; Frasconi, F.; Frattale Mascioli, A.; Frei, Z.; Freise, A.; Freitas, O.; Frey, R.; Frischhertz, W.; Fritschel, P.; Frolov, V. V.; Fronzé, G. G.; Fuentes-Garcia, M.; Fujii, S.; Fujimori, T.; Fulda, P.; Fyffe, M.; Gadre, B.; Gair, J. R.; Galaudage, S.; Galdi, V.; Gallagher, H.; Gallardo, S.; Gallego, B.; Gamba, R.; Gamboa, A.; Ganapathy, D.; Ganguly, A.; Garaventa, B.; García-Bellido, J.; García Núñez, C.; García-Quirós, C.; Gardner, J. W.; Gardner, K. A.; Gargiulo, J.; Garron, A.; Garufi, F.; Gasbarra, C.; Gateley, B.; Gayathri, V.; Gemme, G.; Gennai, A.; Gennari, V.; George, J.; George, R.; Gerberding, O.; Gergely, L.; Ghonge, S.; Ghosh, Archisman; Ghosh, Sayantan; Ghosh, Shaon; Ghosh, Shrobana; Ghosh, Suprovo; Ghosh, Tathagata; Giacoppo, L.; Giaime, J. A.; Giardina, K. D.; Gibson, D. R.; Gibson, D. T.; Gier, C.; Giri, P.; Gissi, F.; Gkaitatzis, S.; Glanzer, J.; Glotin, F.; Godfrey, J.; Godwin, P.; Goebbels, N. L.; Goetz, E.; Golomb, J.; Gomez Lopez, S.; Goncharov, B.; Gong, Y.; González, G.; Goodarzi, P.; Goode, S.; Goodwin-Jones, A. W.; Gosselin, M.; Göttel, A. S.; Gouaty, R.; Gould, D. W.; Govorkova, K.; Goyal, S.; Grace, B.; Grado, A.; Graham, V.; Granados, A. E.; Granata, M.; Granata, V.; Gras, S.; Grassia, P.; Gray, A.; Gray, C.; Gray, R.; Greco, G.; Green, A. C.; Green, S. M.; Green, S. R.; Gretarsson, A. M.; Gretarsson, E. M.; Griffith, D.; Griffiths, W. L.; Griggs, H. L.; Grignani, G.; Grimaldi, A.; Grimaud, C.; Grote, H.; Guerra, D.; Guetta, D.; Guidi, G. M.; Guimaraes, A. R.; Gulati, H. K.; Gulminelli, F.; Gunny, A. M.; Guo, H.; Guo, W.; Guo, Y.; Gupta, Anchal; Gupta, Anuradha; Gupta, Ish; Gupta, N. C.; Gupta, P.; Gupta, S. K.; Gupta, T.; Gupte, N.; Gurs, J.; Gutierrez, N.; Guzman, F.; H, H.-Y.; Haba, D.; Haberland, M.; Haino, S.; Hall, E. D.; Hamilton, E. Z.; Hammond, G.; Han, W.-B.; Haney, M.; Hanks, J.; Hanna, C.; Hannam, M. D.; Hannuksela, O. A.; Hanselman, A. G.; Hansen, H.; Hanson, J.; Harada, R.; Hardison, A. R.; Haris, K.; Harmark, T.; Harms, J.; Harry, G. M.; Harry, I. W.; Hart, J.; Haskell, B.; Haster, C.-J.; Hathaway, J. S.; Haughian, K.; Hayakawa, H.; Hayama, K.; Hayes, R.; Heffernan, A.; Heidmann, A.; Heintze, M. C.; Heinze, J.; Heinzel, J.; Heitmann, H.; Hellman, F.; Hello, P.; Helmling-Cornell, A. F.; Hemming, G.; Henderson-Sapir, O.; Hendry, M.; Heng, I. S.; Hennes, E.; Henshaw, C.; Hertog, T.; Heurs, M.; Hewitt, A. L.; Heyns, J.; Higginbotham, S.; Hild, S.; Hill, S.; Himemoto, Y.; Hirata, N.; Hirose, C.; Hoang, S.; Hochheim, S.; Hofman, D.; Holland, N. A.; Holley-Bockelmann, K.; Holmes, Z. J.; Holz, D. E.; Honet, L.; Hong, C.; Hornung, J.; Hoshino, S.; Hough, J.; Hourihane, S.; Howell, E. J.; Hoy, C. G.; Hrishikesh, C. A.; Hsieh, H.-F.; Hsiung, C.; Hsu, H. C.; Hsu, W.-F.; Hu, P.; Hu, Q.; Huang, H. Y.; Huang, Y.-J.; Huddart, A. D.; Hughey, B.; Hui, D. C. Y.; Hui, V.; Husa, S.; Huxford, R.; Huynh-Dinh, T.; Iampieri, L.; Iandolo, G. A.; Ianni, M.; Iess, A.; Imafuku, H.; Inayoshi, K.; Inoue, Y.; Iorio, G.; Iqbal, M. H.; Irwin, J.; Ishikawa, R.; Isi, M.; Ismail, M. A.; Itoh, Y.; Iwanaga, H.; Iwaya, M.; Iyer, B. R.; JaberianHamedan, V.; Jacquet, C.; Jacquet, P.-E.; Jadhav, S. J.; Jadhav, S. P.; Jain, T.; James, A. L.; James, P. A.; Jamshidi, R.; Janquart, J.; Janssens, K.; Janthalur, N. N.; Jaraba, S.; Jaranowski, P.; Jaume, R.; Javed, W.; Jennings, A.; Jia, W.; Jiang, J.; Kubisz, J.; Johanson, C.; Johns, G. R.; Johnson, N. A.; Johnson-McDaniel, N. K.; Johnston, M. C.; Johnston, R.; Johny, N.; Jones, D. H.; Jones, D. I.; Jones, R.; Jose, S.; Joshi, P.; Ju, L.; Jung, K.; Junker, J.; Juste, V.; Kajita, T.; Kaku, I.; Kalaghatgi, C.; Kalogera, V.; Kamiizumi, M.; Kanda, N.; Kandhasamy, S.; Kang, G.; Kanner, J. B.; Kapadia, S. J.; Kapasi, D. P.; Karat, S.; Karathanasis, C.; Kashyap, R.; Kasprzack, M.; Kastaun, W.; Kato, T.; Katsavounidis, E.; Katzman, W.; Kaushik, R.; Kawabe, K.; Kawamoto, R.; Kazemi, A.; Kedia, A.; Keitel, D.; Kelley-Derzon, J.; Kennington, J.; Kesharwani, R.; Key, J. S.; Khadela, R.; Khadka, S.; Khalili, F. Y.; Khan, F.; Khan, I.; Khanam, T.; Khursheed, M.; Khusid, N. M.; Kiendrebeogo, W.; Kijbunchoo, N.; Kim, C.; Kim, J. C.; Kim, K.; Kim, M. H.; Kim, S.; Kim, Y.-M.; Kimball, C.; Kinley-Hanlon, M.; Kinnear, M.; Kissel, J. S.; Klimenko, S.; Knee, A. M.; Knust, N.; Kobayashi, K.; Koch, P.; Koehlenbeck, S. M.; Koekoek, G.; Kohri, K.; Kokeyama, K.; Koley, S.; Kolitsidou, P.; Kolstein, M.; Komori, K.; Kong, A. K. H.; Kontos, A.; Korobko, M.; Kossak, R. V.; Kou, X.; Koushik, A.; Kouvatsos, N.; Kovalam, M.; Kozak, D. B.; Kranzhoff, S. L.; Kringel, V.; Krishnendu, N. V.; Królak, A.; Kruska, K.; Kuehn, G.; Kuijer, P.; Kulkarni, S.; Kulur Ramamohan, A.; Kumar, A.; Kumar, Praveen; Kumar, Prayush; Kumar, Rahul; Kumar, Rakesh; Kume, J.; Kuns, K.; Kuntimaddi, N.; Kuroyanagi, S.; Kurth, N. J.; Kuwahara, S.; Kwak, K.; Kwan, K.; Kwok, J.; Lacaille, G.; Lagabbe, P.; Laghi, D.; Lai, S.; Laity, A. H.; Lakkis, M. H.; Lalande, E.; Lalleman, M.; Lalremruati, P. C.; Landry, M.; Landry, P.; Lane, B. B.; Lang, R. N.; Lange, J.; Lantz, B.; La Rana, A.; La Rosa, I.; Lartaux-Vollard, A.; Lasky, P. D.; Lawrence, J.; Lawrence, M. N.; Laxen, M.; Lazzarini, A.; Lazzaro, C.; Leaci, P.; Lecoeuche, Y. K.; Lee, H. M.; Lee, H. W.; Lee, K.; Lee, R.-K.; Lee, R.; Lee, S.; Lee, Y.; Legred, I. N.; Lehmann, J.; Lehner, L.; Le Jean, M.; Lemaître, A.; Lenti, M.; Leonardi, M.; Lequime, M.; Leroy, N.; Lesovsky, M.; Letendre, N.; Lethuillier, M.; Levin, S. E.; Levin, Y.; Leyde, K.; Li, A. K. Y.; Li, K. L.; Li, T. G. F.; Li, X.; Li, Z.; Lihos, A.; Lin, C-Y.; Lin, C.-Y.; Lin, E. T.; Lin, F.; Lin, H.; Lin, L. C.-C.; Lin, Y.-C.; Linde, F.; Linker, S. D.; Littenberg, T. B.; Liu, A.; Liu, G. C.; Liu, Jian; Llamas Villarreal, F.; Llobera-Querol, J.; Lo, R. K. L.; Locquet, J.-P.; London, L. T.; Longo, A.; Lopez, D.; Lopez Portilla, M.; Lorenzini, M.; Lorenzo-Medina, A.; Loriette, V.; Lormand, M.; Losurdo, G.; Lott, T. P.; Lough, J. D.; Loughlin, H. A.; Lousto, C. O.; Lowry, M. J.; Lu, N.; Lück, H.; Lumaca, D.; Lundgren, A. P.; Lussier, A. W.; Ma, L.-T.; Ma, S.; Ma'arif, M.; Macas, R.; Macedo, A.; MacInnis, M.; Maciy, R. R.; Macleod, D. M.; MacMillan, I. A. O.; Macquet, A.; Macri, D.; Maeda, K.; Maenaut, S.; Magaña Hernandez, I.; Magare, S. S.; Magazzù, C.; Magee, R. M.; Maggio, E.; Maggiore, R.; Magnozzi, M.; Mahesh, M.; Mahesh, S.; Maini, M.; Majhi, S.; Majorana, E.; Makarem, C. N.; Makelele, E.; Malaquias-Reis, J. A.; Mali, U.; Maliakal, S.; Malik, A.; Man, N.; Mandic, V.; Mangano, V.; Mannix, B.; Mansell, G. L.; Mansingh, G.; Manske, M.; Mantovani, M.; Mapelli, M.; Marchesoni, F.; Marín Pina, D.; Marion, F.; Márka, S.; Márka, Z.; Markosyan, A. S.; Markowitz, A.; Maros, E.; Marsat, S.; Martelli, F.; Martin, I. W.; Martin, R. M.; Martinez, B. B.; Martinez, M.; Martinez, V.; Martini, A.; Martinovic, K.; Martins, J. C.; Martynov, D. V.; Marx, E. J.; Massaro, L.; Masserot, A.; Masso-Reid, M.; Mastrodicasa, M.; Mastrogiovanni, S.; Matcovich, T.; Matiushechkina, M.; Matsuyama, M.; Mavalvala, N.; Maxwell, N.; McCarrol, G.; McCarthy, R.; McClelland, D. E.; McCormick, S.; McCuller, L.; McEachin, S.; McElhenny, C.; McGhee, G. I.; McGinn, J.; McGowan, K. B. M.; McIver, J.; McLeod, A.; McRae, T.; Meacher, D.; Meijer, Q.; Melatos, A.; Mellaerts, S.; Menendez-Vazquez, A.; Menoni, C. S.; Mera, F.; Mercer, R. A.; Mereni, L.; Merfeld, K.; Merilh, E. L.; Mérou, J. R.; Merritt, J. D.; Merzougui, M.; Messenger, C.; Messick, C.; Meyer-Conde, M.; Meylahn, F.; Mhaske, A.; Miani, A.; Miao, H.; Michaloliakos, I.; Michel, C.; Michimura, Y.; Middleton, H.; Miller, A. L.; Miller, S.; Millhouse, M.; Milotti, E.; Milotti, V.; Minenkov, Y.; Mio, N.; Mir, Ll. M.; Mirasola, L.; Miravet-Tenés, M.; Miritescu, C.-A.; Mishra, A. K.; Mishra, A.; Mishra, C.; Mishra, T.; Mitchell, A. L.; Mitchell, J. G.; Mitra, S.; Mitrofanov, V. P.; Mittleman, R.; Miyakawa, O.; Miyamoto, S.; Miyoki, S.; Mo, G.; Mobilia, L.; Mohapatra, S. R. P.; Mohite, S. R.; Molina-Ruiz, M.; Mondal, C.; Mondin, M.; Montani, M.; Moore, C. J.; Moraru, D.; More, A.; More, S.; Moreno, G.; Morgan, C.; Morisaki, S.; Moriwaki, Y.; Morras, G.; Moscatello, A.; Mourier, P.; Mours, B.; Mow-Lowry, C. M.; Muciaccia, F.; Mukherjee, Arunava; Mukherjee, D.; Mukherjee, Samanwaya; Mukherjee, Soma; Mukherjee, Subroto; Mukherjee, Suvodip; Mukund, N.; Mullavey, A.; Munch, J.; Mundi, J.; Mungioli, C. L.; Munn Oberg, W. R.; Murakami, Y.; Murakoshi, M.; Murray, P. G.; Muusse, S.; Nabari, D.; Nadji, S. L.; Nagar, A.; Nagarajan, N.; Nagler, K. N.; Nakagaki, K.; Nakamura, K.; Nakano, H.; Nakano, M.; Nandi, D.; Napolano, V.; Narayan, P.; Nardecchia, I.; Narikawa, T.; Narola, H.; Naticchioni, L.; Nayak, R. K.; Neilson, J.; Nelson, A.; Nelson, T. J. N.; Nery, M.; Neunzert, A.; Ng, S.; Nguyen Quynh, L.; Nichols, S. A.; Nielsen, A. B.; Nieradka, G.; Niko, A.; Nishino, Y.; Nishizawa, A.; Nissanke, S.; Nitoglia, E.; Niu, W.; Nocera, F.; Norman, M.; North, C.; Novak, J.; Nuño Siles, J. F.; Nuttall, L. K.; Obayashi, K.; Oberling, J.; O'Dell, J.; Oertel, M.; Offermans, A.; Oganesyan, G.; Oh, J. J.; Oh, K.; O'Hanlon, T.; Ohashi, M.; Ohkawa, M.; Ohme, F.; Oliveira, A. S.; Oliveri, R.; O'Neal, B.; Oohara, K.; O'Reilly, B.; Ormsby, N. D.; Orselli, M.; O'Shaughnessy, R.; O'Shea, S.; Oshima, Y.; Oshino, S.; Ossokine, S.; Osthelder, C.; Ota, I.; Ottaway, D. J.; Ouzriat, A.; Overmier, H.; Owen, B. J.; Pace, A. E.; Pagano, R.; Page, M. A.; Pai, A.; Pal, A.; Pal, S.; Palaia, M. A.; Pálfi, M.; Palma, P. P.; Palomba, C.; Palud, P.; Pan, H.; Pan, J.; Pan, K. C.; Panai, R.; Panda, P. K.; Pandey, S.; Panebianco, L.; Pang, P. T. H.; Pannarale, F.; Pannone, K. A.; Pant, B. C.; Panther, F. H.; Paoletti, F.; Paolone, A.; Papalexakis, E. E.; Papalini, L.; Papigkiotis, G.; Paquis, A.; Parisi, A.; Park, B.-J.; Park, J.; Parker, W.; Pascale, G.; Pascucci, D.; Pasqualetti, A.; Passaquieti, R.; Passenger, L.; Passuello, D.; Patane, O.; Pathak, D.; Pathak, M.; Patra, A.; Patricelli, B.; Patron, A. S.; Paul, K.; Paul, S.; Payne, E.; Pearce, T.; Pedraza, M.; Pegna, R.; Pele, A.; Peña Arellano, F. E.; Penn, S.; Penuliar, M. D.; Perego, A.; Pereira, Z.; Perez, J. J.; Périgois, C.; Perna, G.; Perreca, A.; Perret, J.; Perriès, S.; Perry, J. W.; Pesios, D.; Petracca, S.; Petrillo, C.; Pfeiffer, H. P.; Pham, H.; Pham, K. A.; Phukon, K. S.; Phurailatpam, H.; Piarulli, M.; Piccari, L.; Piccinni, O. J.; Pichot, M.; Piendibene, M.; Piergiovanni, F.; Pierini, L.; Pierra, G.; Pierro, V.; Pietrzak, M.; Pillas, M.; Pilo, F.; Pinard, L.; Pinto, I. M.; Pinto, M.; Piotrzkowski, B. J.; Pirello, M.; Pitkin, M. D.; Placidi, A.; Placidi, E.; Planas, M. L.; Plastino, W.; Poggiani, R.; Polini, E.; Pompili, L.; Poon, J.; Porcelli, E.; Porter, E. K.; Posnansky, C.; Poulton, R.; Powell, J.; Pracchia, M.; Pradhan, B. K.; Pradier, T.; Prajapati, A. K.; Prasai, K.; Prasanna, R.; Prasia, P.; Pratten, G.; Principe, G.; Principe, M.; Prodi, G. A.; Prokhorov, L.; Prosposito, P.; Puecher, A.; Pullin, J.; Punturo, M.; Puppo, P.; Pürrer, M.; Qi, H.; Qin, J.; Quéméner, G.; Quetschke, V.; Quigley, C.; Quinonez, P. J.; Raab, F. J.; Raabith, S. S.; Raaijmakers, G.; Raja, S.; Rajan, C.; Rajbhandari, B.; Ramirez, K. E.; Ramis Vidal, F. A.; Ramos-Buades, A.; Rana, D.; Ranjan, S.; Ransom, K.; Rapagnani, P.; Ratto, B.; Rawat, S.; Ray, A.; Raymond, V.; Razzano, M.; Read, J.; Recaman Payo, M.; Regimbau, T.; Rei, L.; Reid, S.; Reitze, D. H.; Relton, P.; Renzini, A. I.; Rettegno, P.; Revenu, B.; Reyes, R.; Rezaei, A. S.; Ricci, F.; Ricci, M.; Ricciardone, A.; Richardson, J. W.; Richardson, M.; Rijal, A.; Riles, K.; Riley, H. K.; Rinaldi, S.; Rittmeyer, J.; Robertson, C.; Robinet, F.; Robinson, M.; Rocchi, A.; Rolland, L.; Rollins, J. G.; Romano, A. E.; Romano, R.; Romero, A.; Romero-Shaw, I. M.; Romie, J. H.; Ronchini, S.; Roocke, T. J.; Rosa, L.; Rosauer, T. J.; Rose, C. A.; Rosińska, D.; Ross, M. P.; Rossello, M.; Rowan, S.; Roy, S. K.; Roy, S.; Rozza, D.; Ruggi, P.; Ruhama, N.; Ruiz Morales, E.; Ruiz-Rocha, K.; Sachdev, S.; Sadecki, T.; Sadiq, J.; Saffarieh, P.; Sah, M. R.; Saha, S. S.; Saha, S.; Sainrat, T.; Sajith Menon, S.; Sakai, K.; Sakellariadou, M.; Sakon, S.; Salafia, O. S.; Salces-Carcoba, F.; Salconi, L.; Saleem, M.; Salemi, F.; Sallé, M.; Salvador, S.; Sanchez, A.; Sanchez, E. J.; Sanchez, J. H.; Sanchez, L. E.; Sanchis-Gual, N.; Sanders, J. R.; Sänger, E. M.; Santoliquido, F.; Saravanan, T. R.; Sarin, N.; Sasaoka, S.; Sasli, A.; Sassi, P.; Sassolas, B.; Satari, H.; Sathyaprakash, B. S.; Sato, R.; Sato, Y.; Sauter, O.; Savage, R. L.; Sawada, T.; Sawant, H. L.; Sayah, S.; Scacco, V.; Schaetzl, D.; Scheel, Mark; Schiebelbein, A.; Schiworski, M. G.; Schmidt, P.; Schmidt, S.; Schnabel, R.; Schneewind, M.; Schofield, R. M. S.; Schouteden, K.; Schulte, B. W.; Schutz, B. F.; Schwartz, E.; Scialpi, M.; Scott, J.; Scott, S. M.; Seetharamu, T. C.; Seglar-Arroyo, M.; Sekiguchi, Y.; Sellers, D.; Sengupta, A. S.; Sentenac, D.; Seo, E. G.; Seo, J. W.; Sequino, V.; Serra, M.; Servignat, G.; Sevrin, A.; Shaffer, T.; Shah, U. S.; Shaikh, M. A.; Shao, L.; Sharma, A. K.; Sharma, P.; Sharma-Chaudhary, S.; Shaw, M. R.; Shawhan, P.; Shcheblanov, N. S.; Sheridan, E.; Shikano, Y.; Shikauchi, M.; Shimode, K.; Shinkai, H.; Shiota, J.; Shoemaker, D. H.; Shoemaker, D. M.; Short, R. W.; ShyamSundar, S.; Sider, A.; Siegel, H.; Sieniawska, M.; Sigg, D.; Silenzi, L.; Simmonds, M.; Singer, L. P.; Singh, A.; Singh, D.; Singh, M. K.; Singh, S.; Singha, A.; Sintes, A. M.; Sipala, V.; Skliris, V.; Slagmolen, B. J. J.; Slaven-Blair, T. J.; Smetana, J.; Smith, J. R.; Smith, L.; Smith, R. J. E.; Smith, W. J.; Soldateschi, J.; Somiya, K.; Song, I.; Soni, K.; Soni, S.; Sordini, V.; Sorrentino, F.; Sorrentino, N.; Sotani, H.; Soulard, R.; Southgate, A.; Spagnuolo, V.; Spencer, A. P.; Spera, M.; Spinicelli, P.; Spoon, J. B.; Sprague, C. A.; Srivastava, A. K.; Stachurski, F.; Steer, D. A.; Steinlechner, J.; Steinlechner, S.; Stergioulas, N.; Stevens, P.; Stevenson, S.; StPierre, M.; Stratta, G.; Strong, M. D.; Strunk, A.; Sturani, R.; Stuver, A. L.; Suchenek, M.; Sudhagar, S.; Sueltmann, N.; Suleiman, L.; Sullivan, K. D.; Sun, L.; Sunil, S.; Suresh, J.; Sutton, P. J.; Suzuki, T.; Suzuki, Y.; Swinkels, B. L.; Syx, A.; Szczepańczyk, M. J.; Szewczyk, P.; Tacca, M.; Tagoshi, H.; Tait, S. C.; Takahashi, H.; Takahashi, R.; Takamori, A.; Takase, T.; Takatani, K.; Takeda, H.; Takeshita, K.; Talbot, C.; Tamaki, M.; Tamanini, N.; Tanabe, D.; Tanaka, K.; Tanaka, S. J.; Tanaka, T.; Tang, D.; Tanioka, S.; Tanner, D. B.; Tao, L.; Tapia, R. D.; Tapia San Martín, E. N.; Tarafder, R.; Taranto, C.; Taruya, A.; Tasson, J. D.; Teloi, M.; Tenorio, R.; Themann, H.; Theodoropoulos, A.; Thirugnanasambandam, M. P.; Thomas, L. M.; Thomas, M.; Thomas, P.; Thompson, J. E.; Thondapu, S. R.; Thorne, K. A.; Thrane, E.; Tissino, J.; Tiwari, A.; Tiwari, P.; Tiwari, S.; Tiwari, V.; Todd, M. R.; Toivonen, A. M.; Toland, K.; Tolley, A. E.; Tomaru, T.; Tomita, K.; Tomura, T.; Tong, H.; Tong-Yu, C.; Toriyama, A.; Toropov, N.; Torres-Forné, A.; Torrie, C. I.; Toscani, M.; Tosta e Melo, I.; Tournefier, E.; Trapananti, A.; Travasso, F.; Traylor, G.; Trevor, M.; Tringali, M. C.; Tripathee, A.; Troian, G.; Troiano, L.; Trovato, A.; Trozzo, L.; Trudeau, R. J.; Tsang, T. T. L.; Tso, R.; Tsuchida, S.; Tsukada, L.; Tsutsui, T.; Turbang, K.; Turconi, M.; Turski, C.; Ubach, H.; Uchikata, N.; Uchiyama, T.; Udall, R. P.; Uehara, T.; Uematsu, M.; Ueno, K.; Ueno, S.; Undheim, V.; Ushiba, T.; Vacatello, M.; Vahlbruch, H.; Vaidya, N.; Vajente, G.; Vajpeyi, A.; Valdes, G.; Valencia, J.; Valentini, M.; Vallejo-Peña, S. A.; Vallero, S.; Valsan, V.; van Bakel, N.; van Beuzekom, M.; van Dael, M.; van den Brand, J. F. J.; Van Den Broeck, C.; Vander-Hyde, D. C.; van der Sluys, M.; Van de Walle, A.; van Dongen, J.; Vandra, K.; van Haevermaet, H.; van Heijningen, J. V.; Van Hove, P.; VanKeuren, M.; Vanosky, J.; van Putten, M. H. P. M.; van Ranst, Z.; van Remortel, N.; Vardaro, M.; Vargas, A. F.; Varghese, J. J.; Varma, V.; Vasúth, M.; Vecchio, A.; Vedovato, G.; Veitch, J.; Veitch, P. J.; Venikoudis, S.; Venneberg, J.; Verdier, P.; Verkindt, D.; Verma, B.; Verma, P.; Verma, Y.; Vermeulen, S. M.; Vetrano, F.; Veutro, A.; Vibhute, A. M.; Viceré, A.; Vidyant, S.; Viets, A. D.; Vijaykumar, A.; Vilkha, A.; Villa-Ortega, V.; Vincent, E. T.; Vinet, J.-Y.; Viret, S.; Virtuoso, A.; Vitale, S.; Vives, A.; Vocca, H.; Voigt, D.; von Reis, E. R. G.; von Wrangel, J. S. A.; Vyatchanin, S. P.; Wade, L. E.; Wade, M.; Wagner, K. J.; Wajid, A.; Walker, M.; Wallace, G. S.; Wallace, L.; Wang, H.; Wang, J. Z.; Wang, W. H.; Wang, Z.; Waratkar, G.; Warner, J.; Was, M.; Washimi, T.; Washington, N. Y.; Watarai, D.; Wayt, K. E.; Weaver, B. R.; Weaver, B.; Weaving, C. R.; Webster, S. A.; Weinert, M.; Weinstein, A. J.; Weiss, R.; Wellmann, F.; Wen, L.; Weßels, P.; Wette, K.; Whelan, J. T.; Whiting, B. F.; Whittle, C.; Wildberger, J. B.; Wilk, O. S.; Wilken, D.; Wilkin, A. T.; Willadsen, D. J.; Willetts, K.; Williams, D.; Williams, M. J.; Williams, N. S.; Willis, J. L.; Willke, B.; Wils, M.; Winterflood, J.; Wipf, C. C.; Woan, G.; Woehler, J.; Wofford, J. K.; Wolfe, N. E.; Wong, H. T.; Wong, H. W. Y.; Wong, I. C. F.; Wright, J. L.; Wright, M.; Wu, C.; Wu, D. S.; Wu, H.; Wuchner, E.; Wysocki, D. M.; Xu, V. A.; Xu, Y.; Yadav, N.; Yamamoto, H.; Yamamoto, K.; Yamamoto, T. S.; Yamamoto, T.; Yamamura, S.; Yamazaki, R.; Yan, S.; Yan, T.; Yang, F. W.; Yang, F.; Yang, K. Z.; Yang, Y.; Yarbrough, Z.; Yasui, H.; Yeh, S.-W.; Yelikar, A. B.; Yin, X.; Yokoyama, J.; Yokozawa, T.; Yoo, J.; Yu, H.; Yuan, S.; Yuzurihara, H.; Zadrożny, A.; Zanolin, M.; Zeeshan, M.; Zelenova, T.; Zendri, J.-P.; Zeoli, M.; Zerrad, M.; Zevin, M.; Zhang, A. C.; Zhang, L.; Zhang, R.; Zhang, T.; Zhang, Y.; Zhao, C.; Zhao, Yue; Zhao, Yuhang; Zheng, Y.; Zhong, H.; Zhou, R.; Zhu, X.-J.; Zhu, Z.-H.; Zimmerman, A. B.; Zucker, M. E.; Zweizig, J.; LIGO Scientific Collaboration; Virgo Collaboration; KAGRA Collaboration

doi:10.3847/2041-8213/ad5beb

Published August 1, 2024 | Version Published

Journal Article Open

Observation of Gravitational Waves from the Coalescence of a 2.5–4.5 M⊙ Compact Object and a Neutron Star

1. Max Planck Institute for Gravitational Physics
2. California Institute of Technology
3. Laser Interferometer Gravitational Wave Observatory
4. University of Salerno
5. INFN Sezione di Napoli
6. University of Warwick
7. Pennsylvania State University
8. University of Wisconsin–Milwaukee
9. Louisiana State University
10. Université Catholique de Louvain
11. Inter-University Centre for Astronomy and Astrophysics
12. Queen Mary University of London
13. Sejong University
14. National Institute for Space Research
15. Stanford University
16. University of Rome Tor Vergata
17. INFN Sezione di Roma II
18. Cardiff University
19. University of Antwerp
20. International Centre for Theoretical Sciences
21. University College Dublin
22. National Astronomical Observatory of Japan
23. INFN Sezione di Torino
24. Friedrich Schiller University Jena
25. University of Turin
26. University of Glasgow
27. University of Western Australia
28. Université Savoie Mont Blanc
29. University of Naples Federico II
30. Australian National University
31. Massachusetts Institute of Technology
32. Maastricht University
33. National Institute for Subatomic Physics
34. Université Libre de Bruxelles
35. Institut Fresnel
36. Laboratoire de Physique des 2 Infinis Irène Joliot-Curie
37. University of Tokyo
38. University of Barcelona
39. Institute for High Energy Physics
40. Leibniz University Hannover
41. Gran Sasso Science Institute
42. University of Florida
43. University of Udine
44. INFN Sezione di Trieste
45. Monterrey Institute of Technology and Higher Education
46. Observatoire de la Côte d'Azur
47. INFN Sezione di Perugia
48. University of Camerino
49. University of Washington
50. California State University, Fullerton
51. Villanova University
52. INFN Sezione di Genova
53. University of Genoa
54. European Gravitational Observatory
55. Georgia Institute of Technology
56. Chennai Mathematical Institute
57. Royal Holloway University of London
58. The Graduate University for Advanced Studies, SOKENDAI
59. University of Urbino
60. INFN Sezione di Firenze
61. INFN Sezione di Roma I
62. Sapienza University of Rome
63. University of Strasbourg
64. Embry–Riddle Aeronautical University
65. Bar-Ilan University
66. Astroparticle and Cosmology Laboratory
67. King's College London
68. Korea Institute of Science & Technology Information
69. Kenyon College
70. Osaka University
71. Utrecht University
72. University of Oregon
73. Syracuse University
74. Northwestern University
75. Wigner Research Centre for Physics
76. Concordia University Wisconsin
77. Universität Hamburg
78. University of Pisa
79. INFN Sezione di Pisa
80. University of Perugia
81. University of Michigan–Ann Arbor
82. University of Padua
83. INFN Sezione di Padova
84. Institute for Plasma Research
85. Ghent University
86. Polish Academy of Sciences
87. University of Sannio
88. University of Minnesota
89. Claude Bernard University Lyon 1
90. University of Strathclyde
91. University of the Balearic Islands
92. Autonomous University of Barcelona
93. Raja Ramanna Centre for Advanced Technology
94. University of Amsterdam
95. Missouri University of Science and Technology
96. Colorado State University
97. VU Amsterdam
98. Lomonosov Moscow State University
99. KU Leuven
100. University of Trento
101. Trento Institute for Fundamental Physics and Applications
102. University of Adelaide
103. French National Centre for Scientific Research
104. University of Rennes 1
105. University of Birmingham
106. Washington State University
107. University of Liège
108. Institute for Theoretical Physics
109. Gran Sasso National Laboratory
110. Kastler-Brossel Laboratory
111. Christopher Newport University
112. University of Warsaw
113. University of Maryland, College Park
114. University of Milano-Bicocca
115. INFN Sezione di Milano Bicocca
116. Paul Sabatier University
117. University of Portsmouth
118. Institut Lumière Matière
119. University of Santiago de Compostela
120. University of Chicago
121. Goddard Space Flight Center
122. Texas A&M University
123. University of Melbourne
124. Laboratori Nazionali del Sud
125. University of Copenhagen
126. Institute for Space Astrophysics and Planetology
127. University of Massachusetts Dartmouth
128. University of Valencia
129. University of British Columbia
130. National Cheng Kung University
131. National Tsing Hua University
132. National Central University
133. Charles Sturt University
134. Vanderbilt University
135. National Chiao Tung University
136. The University of Texas at Austin
137. Cornell University
138. Northeastern University
139. Monash University
140. Osservatorio Astronomico di Padova
141. ARC Centre of Excellence for Gravitational Wave Discovery
142. Brera Astronomical Observatory
143. Montana State University
144. Texas Tech University
145. Columbia University
146. University of Rhode Island
147. The University of Texas Rio Grande Valley
148. University of Sassari
149. Laboratoire de Physique Corpusculaire de Caen
150. University of Parma
151. INFN, Sezione di Milano Bicocca, Gruppo Collegato di Parma, I-43124 Parma, Italy
152. Perimeter Institute
153. Mines ParisTech
154. Indian Institute of Technology Madras
155. Graduate School of Science, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8551, Japan
156. National Centre for Nuclear Research
157. Institut d'Astrophysique de Paris
158. Sorbonne University
159. Vrije Universiteit Brussel
160. Carleton College
161. University of Toyama
162. Canadian Institute for Theoretical Astrophysics
163. University of Cambridge
164. Stony Brook University
165. Center for Computational Astrophysics, Flatiron Institute, New York, NY 10010, USA
166. Montclair State University
167. University of Trieste
168. Institute for Nuclear Research
169. Center for Particle Physics of Marseilles
170. Superconducting and other Innovative Materials and Devices Institute
171. University of Basilicata
172. Western Washington University
173. University of the West of Scotland
174. University of Utah
175. Eötvös Loránd University
176. University of Minho
177. Department of Physics, Graduate School of Science, Osaka Metropolitan University, 3-3-138 Sugimoto-cho, Sumiyoshi-ku, Osaka City, Osaka 558-8585, Japan
178. Rochester Institute of Technology
179. California State University, Long Beach
180. University of Zurich
181. University of Szeged
182. Indian Institute of Technology Bombay
183. Wuhan University
184. University of California, Riverside
185. Astronomical Observatory of Capodimonte
186. University of Nottingham
187. Ariel University
188. University of Mississippi
189. Academia Sinica
190. Shanghai Astronomical Observatory
191. Chinese University of Hong Kong
192. Marquette University
193. American University
194. University of Nevada, Las Vegas, Las Vegas, NV 89154, USA
195. Fukuoka University
196. University of California, Berkeley
197. Lancaster University
198. Nihon University
199. Niigata University
200. Tamkang University
201. Rutherford Appleton Laboratory
202. Chungnam National University
203. Scuola Normale Superiore di Pisa
204. Peking University
205. Aoyama Gakuin University
206. Nambu Yoichiro Institute of Theoretical and Experimental Physics (NITEP), Osaka Metropolitan University, 3-3-138 Sugimoto-cho, Sumiyoshi-ku, Osaka City, Osaka 558-8585, Japan
207. Department of Atomic Energy
208. University of Białystok
209. Jagiellonian University
210. University of Southampton
211. Ulsan National Institute of Science and Technology
212. Chung-Ang University
213. University of Washington Bothell, Bothell, WA 98011, USA
214. Aix-Marseille University
215. University of Ouagadougou
216. Ewha Womans University
217. Seoul National University
218. Korea Astronomy and Space Science Institute
219. Sungkyunkwan University
220. High Energy Accelerator Research Organization
221. Bard College
222. Institute of Mathematics
223. Nagoya University
224. University of Montreal
225. Indian Institute of Science Education and Research Kolkata
226. Inje University
227. University of Florence
228. National Center for High-Performance Computing
229. Marshall Space Flight Center
230. West Virginia University
231. Heidelberg University
232. Tongji University
233. Institut d'Estudis Espacials de Catalunya
234. Institució Catalana de Recerca i Estudis Avançats
235. Tsinghua University
236. University of Cagliari
237. Saha Institute of Nuclear Physics
238. Tata Institute of Fundamental Research
239. Hobart and William Smith Colleges
240. Institut des Hautes Études Scientifiques
241. Ryukoku University
242. University of Notre Dame
243. University of Stavanger
244. Hiroshima University
245. Laboratory Universe and Theories
246. Paris Observatory
247. PSL Research University
248. University of Paris
249. National Institute for Mathematical Sciences
250. The Open University of Japan
251. Central Glass and Ceramic Research Institute
252. National Research Council
253. Aristotle University of Thessaloniki
254. Yonsei University
255. Enrico Fermi Center for Study and Research
256. Roma Tre University
257. Laboratoire de Physique Subatomique et des Technologies Associées
258. University of Antioquia
259. Technical University of Madrid
260. National Institute of Technology
261. University of Ferrara
262. Toho University
263. Indian Institute of Technology Gandhinagar
264. Laboratoire MSME, Cité Descartes, 5 Boulevard Descartes, Champs-sur-Marne, 77454 Marne-la-Vallée Cedex 2, France
265. University of Tsukuba
266. Chapman University
267. Osaka Institute of Technology
268. Arcetri Astrophysical Observatory
269. RIKEN
270. International School for Advanced Studies
271. Goethe University Frankfurt
272. INAF, Osservatorio di Astrofisica e Scienza dello Spazio, I-40129 Bologna, Italy
273. São Paulo State University
274. Tokyo City University
275. Kyoto University
276. University of Catania
277. National Defense Academy of Japan
278. Eindhoven University of Technology
279. Deceased, 2024 February.
280. Beijing Normal University

We report the observation of a coalescing compact binary with component masses 2.5–4.5 M_⊙ and 1.2–2.0 M_⊙ (all measurements quoted at the 90% credible level). The gravitational-wave signal GW230529_181500 was observed during the fourth observing run of the LIGO–Virgo–KAGRA detector network on 2023 May 29 by the LIGO Livingston observatory. The primary component of the source has a mass less than 5 M_⊙ at 99% credibility. We cannot definitively determine from gravitational-wave data alone whether either component of the source is a neutron star or a black hole. However, given existing estimates of the maximum neutron star mass, we find the most probable interpretation of the source to be the coalescence of a neutron star with a black hole that has a mass between the most massive neutron stars and the least massive black holes observed in the Galaxy. We provisionally estimate a merger rate density of 55^(+127)_(-47) Gpc⁻³ yr ⁻¹ for compact binary coalescences with properties similar to the source of GW230529_181500; assuming that the source is a neutron star–black hole merger, GW230529_181500-like sources may make up the majority of neutron star–black hole coalescences. The discovery of this system implies an increase in the expected rate of neutron star–black hole mergers with electromagnetic counterparts and provides further evidence for compact objects existing within the purported lower mass gap.

Copyright and License

© 2024. The Author(s). Published by the American Astronomical Society. Original content from this work may be used under the terms of the Creative Commons Attribution 4.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.

Acknowledgement

This material is based on work supported by NSF's LIGO Laboratory, which is a major facility fully funded by the National Science Foundation. The authors also gratefully acknowledge the support of the Science and Technology Facilities Council (STFC) of the United Kingdom, the Max-Planck-Society (MPS), and the State of Niedersachsen/Germany for support of the construction of Advanced LIGO and construction and operation of the GEO 600 detector. Additional support for Advanced LIGO was provided by the Australian Research Council. The authors gratefully acknowledge the Italian Istituto Nazionale di Fisica Nucleare (INFN), the French Centre National de la Recherche Scientifique (CNRS), and the Netherlands Organization for Scientific Research (NWO) for the construction and operation of the Virgo detector and the creation and support of the EGO consortium. The authors also gratefully acknowledge research support from these agencies, as well as by the Council of Scientific and Industrial Research of India, the Department of Science and Technology, India, the Science & Engineering Research Board (SERB), India, the Ministry of Human Resource Development, India, the Spanish Agencia Estatal de Investigación (AEI), the Spanish Ministerio de Ciencia, Innovación y Universidades, the European Union NextGenerationEU/PRTR (PRTR-C17.I1), the ICSC - CentroNazionale di Ricerca in High Performance Computing, Big Dataand Quantum Computing, funded by the European Union NextGenerationEU, the Comunitat Autonòma de les Illes Balears through the Direcció General de Recerca, Innovació i Transformació Digital with funds from the Tourist Stay Tax Law ITS 2017-006, the Conselleria d’Economia, Hisenda i Innovació the FEDER Operational Program 2021–2027 of the Balearic Islands, the Conselleria d’Innovació Universitats, Ciència i Societat Digital de la Generalitat Valenciana and the CERCA Programme Generalitat de Catalunya, Spain, the National Science Centre of Poland and the European Union—European Regional Development Fund; Foundation for Polish Science (FNP), the Polish Ministry of Science and Higher Education, the Swiss National Science Foundation (SNSF), the Russian Science Foundation, the European Commission, the European Social Funds (ESF), the European Regional Development Funds (ERDF), the Royal Society, the Scottish Funding Council, the Scottish Universities Physics Alliance, the Hungarian Scientific Research Fund (OTKA), the French Lyon Institute of Origins (LIO), the Belgian Fonds de la Recherche Scientifique (FRS-FNRS), Actions de Recherche Concertées (ARC) and Fonds Wetenschappelijk Onderzoek—Vlaanderen (FWO), Belgium, the Paris Île-de-France Region, the National Research, Development and Innovation Office Hungary (NKFIH), the National Research Foundation of Korea, the Natural Science and Engineering Research Council Canada, Canadian Foundation for Innovation (CFI), the Brazilian Ministry of Science, Technology, and Innovations, the International Center for Theoretical Physics South American Institute for Fundamental Research (ICTP-SAIFR), the Research Grants Council of Hong Kong, the National Natural Science Foundation of China (NSFC), the Leverhulme Trust, the Research Corporation, the National Science and Technology Council (NSTC), Taiwan, the United States Department of Energy, and the Kavli Foundation. The authors gratefully acknowledge the support of the NSF, STFC, INFN, and CNRS for provision of computational resources. This work was supported by MEXT, JSPS Leading-edge Research Infrastructure Program, JSPS Grant-in-Aid for Specially Promoted Research 26000005, JSPS Grant-in-Aid for Scientific Research on Innovative Areas 2905: JP17H06358, JP17H06361 and JP17H06364, JSPS Core-to-Core Program A. Advanced Research Networks, JSPS Grant-in-Aid for Scientific Research (S) 17H06133 and 20H05639, JSPS Grant-in-Aid for Transformative Research Areas (A) 20A203: JP20H05854, the joint research program of the Institute for Cosmic Ray Research, University of Tokyo, National Research Foundation (NRF), Computing Infrastructure Project of Global Science experimental Data hub Center (GSDC) at KISTI, Korea Astronomy and Space Science Institute (KASI), and Ministry of Science and ICT (MSIT) in Korea, Academia Sinica (AS), AS Grid Center (ASGC) and the National Science and Technology Council (NSTC) in Taiwan under grants including the Rising Star Program and Science Vanguard Research Program, Advanced Technology Center (ATC) of NAOJ, and Mechanical Engineering Center of KEK. We thank the anonymous journal referee for helpful comments.

Software References

Calibration of the LIGO strain data was performed with a GstLAL-based calibration software pipeline (Viets et al. 2018). Data-quality products and event-validation results were computed using the DMT (Zweizig 2006), DQR (LIGO Scientific Collaboration & Virgo Collaboration 2018), DQSEGDB (Fisher et al. 2021), gwdetchar (Urban et al. 2021), hveto (Smith et al. 2011), iDQ (Essick et al. 2020a), Omicron (Robinet et al. 2020), and PythonVirgoTools (Virgo Collaboration 2021) software packages and contributing software tools. Analyses in this catalog relied on software from the LVK Algorithm Library Suite (LIGO Scientific, Virgo, & KAGRA Collaboration 2018). The detection of the signals and subsequent significance evaluations were performed with the GstLAL-based inspiral software pipeline (Messick et al. 2017; Sachdev et al. 2019; Hanna et al. 2020; Cannon et al. 2021), with the MBTA pipeline (Adams et al. 2016; Aubin et al. 2021), and with the PyCBC (Usman et al. 2016; Nitz et al. 2017; Davies et al. 2020) packages. Estimates of the noise spectra and glitch models were obtained using BayesWave (Cornish & Littenberg 2015; Littenberg et al. 2016; Cornish et al. 2021). Low-latency source localization was performed using BAYESTAR (Singer & Price 2016). Source-parameter estimation was primarily performed with the Bilby and Parallel Bilby libraries (Ashton et al. 2019; Romero-Shaw et al. 2020; Smith et al. 2020) using the Dynesty nested sampling package (Speagle 2020). SEOBNRv5PHM waveforms used in parameter estimation were generated using pySEOBNR (Mihaylov et al. 2023). FTI and TIGER waveforms used for testing general relativity were generated using Bilby TGR (Ashton et al. 2024). PESummary was used to post-process and collate parameter estimation results (Hoy & Raymond 2021). The various stages of the parameter estimation analysis were managed with the Asimov library (Williams et al. 2023). Plots were prepared with Matplotlib (Hunter 2007), seaborn (Waskom 2021) and GWpy (Macleod et al. 2021). NumPy (Harris et al. 2020) and SciPy (Virtanen et al. 2020) were used for analyses in the manuscript.

Files

Abac_2024_ApJL_970_L34.pdf

Files (4.8 MB)

Name	Size	Download all
Abac_2024_ApJL_970_L34.pdf md5:8592bb6693cfa3a8aaa0382c1c8ac0f1	4.8 MB	Preview Download

Additional details

Is new version of: Discussion Paper: arXiv:2404.04248 (arXiv)
Is supplemented by: Dataset: 10.7935/6k89-7q62 (DOI)

Accepted: 2024-06-25
Available: 2024-07-26

Published online

Caltech groups: Astronomy Department, LIGO, TAPIR, Walter Burke Institute for Theoretical Physics, Division of Physics, Mathematics and Astronomy (PMA)
Publication Status: Published

	All versions	This version
Views	30	30
Downloads	11	11
Data volume	81.6 MB	81.6 MB

Observation of Gravitational Waves from the Coalescence of a 2.5–4.5 M⊙ Compact Object and a Neutron Star

Copyright and License

Acknowledgement

Software References

Files

Abac_2024_ApJL_970_L34.pdf

Files (4.8 MB)

Additional details

Related works

Dates

Caltech Custom Metadata

Observation of Gravitational Waves from the Coalescence of a 2.5–4.5 M⊙ Compact Object and a Neutron Star

Creators

Abstract

Copyright and License

Acknowledgement

Software References

Files

Abac_2024_ApJL_970_L34.pdf

Files (4.8 MB)

Additional details

Related works

Dates

Caltech Custom Metadata