Daniel FischerO4b Open Data Release: https://gwosc.org/news/o4b-open-data-release/ -> Open Data from LIGO, Virgo, and KAGRA through the Second Part of the Fourth Observing Run / Observations from the Second Part of the Fourth LIGO-Virgo-KAGRA Observing Run and Updates to the #GravitationalWave Transient Catalog: https://dcc.ligo.org/public/0206/P2600085/008/paper.pdf / https://dcc.ligo.org/public/0206/P2600152/006/gwtc-5_results_noauthors_flattened.pdf -> The new LIGO–Virgo–KAGRA Catalog sets new records in precision gravitational astronomy / Black Hole Discoveries Abound in Newly Released LIGO-Virgo Catalog / Astrophysicists strike black gold with treasure trove of gravitational wave detections / Scientists find the Universe has multiple ways of manufacturing black holes / The new LIGO-Virgo-KAGRA catalog sets records in precision gravitational-wave astronomy: https://www.virgo-gw.eu/news/the-new-ligo-virgo-kagra-catalog-sets-new-records-in-precision-gravitational-astronomy/ / https://www.simonsfoundation.org/2026/05/26/black-hole-discoveries-abound-in-newly-released-ligo-virgo-catalog/ / https://www.gla.ac.uk/news/headline_1267010_en.html / https://www.ozgrav.org/news/scientists-find-the-universe-has-multiple-ways-of-manufacturing-black-holes/ / https://www.aei.mpg.de/1449649/the-new-ligo-virgo-kagra-catalog-sets-records-in-precision-gravitational-wave-astronomy (with still more papers linked).
GW240925 and GW250207 - Astrophysical Calibration of Gravitational-wave Detectors: https://arxiv.org/abs/2605.11703 -> #GravitationalWave detectors can now “autotune” their signals: https://www.aei.mpg.de/1445425/gravitational-wave-detectors-can-now-autotune-their-signals - how “off-key” detector calibration can bias signal-based tests of Einstein’s general theory of relativity.
GW240925 and GW250207: Astrophysical Calibration of Gravitational-wave Detectors
GW240925 and GW250207 are two loud gravitational-wave signals from binary black hole coalescences observed with network signal-to-noise ratios $\sim 32$ and $\sim 69$, respectively, by the LIGO Hanford--LIGO Livingston--Virgo network. Gravitational-wave signals from coalescing binaries have characteristic phase and amplitude evolution predicted by general relativity. These signal waveforms, together with measured instrumental calibration uncertainties, are used to infer source parameters. However, for sufficiently loud detections it is possible to constrain the calibration of the detectors directly using the signals themselves. We present the first informative astrophysical measurements of gravitational-wave detector calibration. For GW240925, we verify the inference of Hanford calibration from the astrophysical signal through cross-checks with known calibration errors obtained from in-situ measurements. At the time of GW250207, the Hanford detector was not fully stabilized, leading to elevated calibration uncertainties; thus, astrophysical calibration is essential to obtain accurate data and to enable source localization. These well-localized, high signal-to-noise observations have the potential to offer precise measurements of source properties, stringent tests of general relativity, and informative dark siren measurements, provided that calibration uncertainties are properly incorporated. As detector sensitivity improves, astrophysical calibration will become an increasingly valuable complement to in-situ calibration measurements. Obtaining accurate calibration will be essential for precision gravitational-wave science.
LIGOAutotuning gravitational-wave detectors using the chirps of the cosmos!
⚫⚫🎶🎛️
Meet #GW240925 and #GW250207, two new, LOUD #GravitationalWave detections that have enabled us to use astrophysical calibration to tune our laser interferometers
🖼️ : S Galaudage, S Biscoveanu
Gravitational-wave constraints on the pair-instability mass gap and nuclear burning in massive stars: https://www.nature.com/articles/s41550-026-02847-0 -> Biggest black holes built up in busy star clusters after series of violent merging events, research finds: https://www.eurekalert.org/news-releases/1126877 - team identifies two distinct black hole populations in version 4.0 of the #GravitationalWave Transient Catalog.
Gravitational-wave constraints on the pair-instability mass gap and nuclear burning in massive stars - Nature Astronomy
Gravitational-wave data reveal evidence for the pair-instability mass gap and a population of high-mass black hole mergers formed in star clusters. The measurement also constrains the nuclear reaction that regulates carbon–oxygen production in massive stars.
Dr Sam MorrellSorry to anyone who has tried to access #gwchirp recently, but the SSL certificates expired and updating them got lost in my todo-list. Rest assured it has now been updated and available again at https://chirp.research.exeter.ac.uk/.
There's not been an awful lot to see of late, as the #Gravitationalwave network is mostly not actively observing, but we'll hopefully be ready to catch them when the new events start to pour in.
Low Rank Jack"Mexican Burrowing Toads as gravitational wave detectors" by Frederic V. Hessman, Christian Jooss https://arxiv.org/abs/2603.29334 #arxiv #gravitationalWave #futurenobel
Mexican Burrowing Toads as gravitational wave detectors
It is generally assumed that gravitational waves are extremely difficult to detect. However, we show that the call of the Mexican Burrowing Toad has an amazing resemblance to cosmic gravitational wave signals due to the merging of neutron stars and/or black holes. It is known that toads exhibit magnetoreception - the ability to detect magnetic fields - and that magnetic fields thus subtly affect ion channel activities in toad neurons. We speculate that gravitational strains produce phonons and magnons in a ferromagnetic substance embedded in the nervous system of the toads and that these coherent signals are exponentially amplified by a Raman laser mechanism to the point where they can be detected. The fine tuning necessary for this mechanism to work would help to explain why this species of toad show this remarkable ability and others do not. We analyze the sound of a pond full of Mexican Burrowing Toads in the hopes of detecting slight phase shifts in their calls due to a gravitational wave event. No effect was found and the the LIGO/VIRGO consortia have not reported an event during the recording, illustrating the power of this approach. We suggest the massive use of these toads would be an inexpensive way to support the operation of optical interferometric gravitational wave detector facilities.
Jochen Diekenbrock@benknispel
Besser 😀
Ich war vor einigen Jahren da und es ist einfach unglaublich, mit welchen Tricks so eine unfassbare Präzision erreicht wird.
GWTC-4.0 - an Introduction to Version 4.0 of the #GravitationalWave Transient Catalog: https://iopscience.iop.org/article/10.3847/2041-8213/ae0c06 -> The latest crop of space-time wobbles includes a variety of heavy, fast-spinning, and lopsided colliding black holes: https://physics.mit.edu/news/new-catalog-more-than-doubles-the-number-of-gravitational-wave-detections-made-by-ligo-virgo-and-kagra-observatories/ / New catalog of LIGO-Virgo-KAGRA observations published: https://www.aei.mpg.de/1415736/new-catalog-of-ligo-virgo-kagra-observations-published - the latest catalog, GWTC-4, includes 128 new candidates from the fourth observing run, more than doubling the previous total.
GWTC-4.0: An Introduction to Version 4.0 of the Gravitational-Wave Transient Catalog
GWTC-4.0: An Introduction to Version 4.0 of the Gravitational-Wave Transient Catalog, Abac, A. G., Abouelfettouh, I., Acernese, F., Ackley, K., Adhicary, S., Adhikari, D., Adhikari, N., Adhikari, R. X., Adkins, V. K., Afroz, S., Agarwal, D., Agathos, M., Aghaei Abchouyeh, M., Aguiar, O. D., Ahmadzadeh, S., Aiello, L., Ain, A., Ajith, P., Akcay, S., Akutsu, T., Albanesi, S., Alfaidi, R. A., Al-Jodah, A., Alléné, C., Allocca, A., Al-Shammari, S., Altin, P. A., Alvarez-Lopez, S., Amarasinghe, O., Amato, A., Amra, C., Ananyeva, A., Anderson, S. B., Anderson, W. G., Andia, M., Ando, M., Andrade, T., 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., Sedda, M. Arca, Areeda, J. S., Argianas, L., Aritomi, N., Armato, F., Armstrong, S., Arnaud, N., Arogeti, M., Aronson, S. M., Ashton, G., Aso, Y., Assiduo, M., Assis de Souza Melo, S., Aston, S. M., Astone, P., Attadio, F., Aubin, F., AultONeal, K., Avallone, G., Babak, S., Badaracco, F., Badger, C., Bae, S., Bagnasco, S., Bagui, E., Baiotti, L., Bajpai, R., Baka, T., Baker, T., Ball, M., Ballardin, G., Ballmer, S. W., Banagiri, S., Banerjee, B., Bankar, D., Baptiste, T. M., Baral, P., Barayoga, J. C., Barish, B. C., Barker, D., Barman, N., 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 II, P. A., Bazzan, M., Bedakihale, V. M., Beirnaert, F., Bejger, M., Belardinelli, D., Bell, A. S., Bellie, D. S., Bellizzi, L., Benoit, W., Bentara, I., Bentley, J. D., Ben Yaala, M., Bera, S., Bergamin, F., Berger, B. K., Bernuzzi, S., Beroiz, M., Berry, C. P. L., Bersanetti, D., Bertolini, A., Betzwieser, J., Beveridge, D., Bevilacqua, G., Bevins, N., Bhandare, R., Bhat, S. A., Bhatt, R., Bhattacharjee, D., Bhaumik, S., Bhowmick, S., Biancalana, V., Bianchi, A., Bilenko, I. A., Billingsley, G., Binetti, A., Bini, S., Binu, C., Birnholtz, O., Biscoveanu, S., Bisht, A., Bitossi, M., Bizouard, M.-A., Blaber, S., 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., Borhanian, S., Boschi, V., Bose, S., Bossilkov, V., Boudon, A., Bozzi, A., Bradaschia, C., Brady, P. R., Branch, A., Branchesi, M., Braun, I., 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., Bu, Y., 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., Calafat, A., Bustillo, J. Calderón, Callister, T. A., Calloni, E., Canepa, M., Caneva Santoro, G., Cannon, K. C., Cao, H., Capistran, L. A., Capocasa, E., Capote, E., Capurri, G., Carapella, G., Carbognani, F., Carlassara, M., Carlin, J. B., Carlson, T. K., Carney, M. F., 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., Chakraborty, S., Chalathadka Subrahmanya, S., Chan, J. C. L., Chan, M., Chang, R.-J., Chao, S., Charlton, E. L., Charlton, P., Chassande-Mottin, E., Chatterjee, C., Chatterjee, Debarati, Chatterjee, Deep, Chaturvedi, M., Chaty, S., Chatziioannou, K., Checchia, C., Chen, A., Chen, A. H.-Y., Chen, D., Chen, H., Chen, H. Y., Chen, S., 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., Clyne, S. M., Coccia, E., Codazzo, E., Cohadon, P.-F., Colace, S., Colangeli, E., Colleoni, M., Collette, C. G., Collins, J., Colloms, S., Colombo, A., Compton, C. M., Connolly, G., Conti, L., Corbitt, T. R., Cordero-Carrión, I., Corezzi, S., Cornish, N. J., Corsi, A., Cortese, S., Cottingham, R., Coughlin, M. W., Couineaux, A., Coulon, J.-P., Coupechoux, J.-F., Couvares, P., Coward, D. M., Coyne, R., Craig, K., Creighton, J. D. E., Creighton, T. D., Cremonese, P., Criswell, A. W., Crook, S., Crouch, R., Csizmazia, J., Cudell, J. R., Cullen, T. J., Cumming, A., Cuoco, E., Cusinato, M., Dabadie, P., Da Conceição, L. V., 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., Dax, M., De Bolle, J., Deenadayalan, M., Degallaix, J., Deka, U., De Laurentis, M., Deléglise, S., De Lillo, F., Dell’Aquila, D., Della Valle, F., Del Pozzo, W., De Marco, F., Demasi, G., De Matteis, F., D’Emilio, V., Demos, N., Depasse, A., DePergola, N., De Pietri, R., De Rosa, R., De Rossi, C., Desai, M., DeSalvo, R., DeSimone, A., 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., Doerksen, N., Dohmen, E., 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., 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., Emma, M., Endo, K., Enficiaud, R., Engl, A. J., Errico, L., Espinosa, R., Esposito, M., Essick, R. C., Estellés, H., 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., Fernandes, T., Fernando, D., 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., Fong, H., Font, J. A., Foo, C., 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., 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., Garver, P. A., Gasbarra, C., Gateley, B., Gautier, F., Gayathri, V., Gayer, T., Gemme, G., Gennai, A., Gennari, V., George, J., George, R., Gerberding, O., Gergely, L., Ghosh, Archisman, Ghosh, Sayantan, Ghosh, Shaon, Ghosh, Shrobana, Ghosh, Suprovo, Ghosh, Tathagata, Giaime, J. A., Giardina, K. D., Gibson, D. R., Gibson, D. T., Gier, C., Gkaitatzis, S., Glanzer, J., Glotin, F., Godfrey, J., Godwin, P., Goettel, A. S., Goetz, E., Golomb, J., Gomez Lopez, S., Goncharov, B., Gong, Y., González, G., Goodarzi, P., Goode, S., Goodwin-Jones, A. W., Gosselin, M., 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., Grimaud, C., Grote, H., Grunewald, S., 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, I., Gupta, N. C., Gupta, P., Gupta, S. K., Gupta, T., Gupta, V., Gupte, N., Gurs, J., Gutierrez, N., Guzman, F., Haba, D., Haberland, M., Haino, S., Hall, E. D., Hamburg, R., 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., Harikumar, S., Haris, K., Harmark, T., Harms, J., Harry, G. M., Harry, I. W., Hart, J., Haskell, B., Haster, C.-J., Haughian, K., Hayakawa, H., Hayama, K., Hayes, R., Heintze, M. C., Heinze, J., Heinzel, J., Heitmann, H., Heffernan, A., Hellman, F., Helmling-Cornell, A. F., Hemming, G., Henderson-Sapir, O., Hendry, M., Heng, I. S., Hennig, M. H., Henshaw, C., Heurs, M., Hewitt, A. L., Heyns, J., Higginbotham, S., Hild, S., Hill, S., Himemoto, Y., Hirata, N., Hirose, C., Hochheim, S., Hofman, D., Holland, N. A., Holz, D. E., Honet, L., Hong, C., Hoshino, S., Hough, J., Hourihane, S., Howard, N. T., Howell, E. J., Hoy, C. G., Hrishikesh, C. A., Hsieh, H.-F., Hsieh, H.-Y., Hsiung, C., Hsu, W.-F., Hu, Q., Huang, H. Y., Huang, Y., Huang, Y. T., Huddart, A. D., Hughey, B., Hui, D. C. Y., Hui, V., Husa, S., Huxford, R., Iampieri, L., Iandolo, G. A., Ianni, M., Ierardi, A., Iess, A., Imafuku, H., Inayoshi, K., Inoue, Y., Iorio, G., Iosif, P., Iqbal, M. H., Irwin, J., Ishikawa, R., Isi, M., Itoh, Y., Iwanaga, H., Iwaya, M., Iyer, B. R., Jacquet, C., Jacquet, P.-E., Jadhav, S. J., Jadhav, S. P., Jain, T., James, A. L., James, P. A., Jamshidi, R., Jan, A., Jani, K., Janquart, J., Janssens, K., Janthalur, N. N., Jaraba, S., Jaranowski, P., Jaume, R., Javed, W., Jennings, A., Jia, W., Jiang, J., Jin, S. 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, E. J., Jones, R., Jose, S., Joshi, P., Joshi, S. K., Ju, J., Ju, L., Jung, K., Junker, J., Juste, V., Kabagoz, H. B., Kajita, T., Kaku, I., Kalogera, V., Kalomenopoulos, M., Kamiizumi, M., Kanda, N., Kandhasamy, S., Kang, G., Kannachel, N. C., Kanner, J. B., Kapadia, S. J., Kapasi, D. P., Karat, S., Kashyap, R., Kasprzack, M., Kastaun, W., Kato, T., Katsavounidis, E., Katzman, W., Kaushik, R., Kawabe, K., Kawamoto, R., Kazemi, A., Keitel, D., 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., 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. 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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., The LIGO Scientific Collaboration, the Virgo Collaboration, and the KAGRA Collaboration
A delightful mini-documentary from our @UofGravity colleagues to celebrating the first decade of #GravitationalWave astronomy and the path ahead
University of Glasgow celebrates 10th anniversary of first gravitational wave detection
Strategy for Identifying Vera C. #Rubin Observatory #Kilonova Candidates for Targeted #GravitationalWave Searches: https://iopscience.iop.org/article/10.3847/1538-4357/ae244e -> How Many Kilonovae Will Rubin Observatory Help Us Spot? https://aasnova.org/2026/02/04/how-many-kilonovae-will-rubin-observatory-help-us-spot/
