Metsähovi Radio Observatory

Search results

  • 2025

    Accessing a New Population of Supermassive Black Holes with Extensions to the Event Horizon Telescope

    Zhang, X. A., Ricarte, A., Pesce, D. W., Johnson, M. D., Nagar, N., Narayan, R., Ramakrishnan, V., Doeleman, S., Palumbo, D. C. M. & Event Horizon Telescope Collaboration, 20 May 2025, In: Astrophysical Journal. 985, 1, 41.

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  • Active galactic nucleus time-variability analysis and its caveats

    Kankkunen, S., Tornikoski, M. & Hovatta, T., 1 Jan 2025, In: Astronomy and Astrophysics. 693, 14 p., A319.

    Research output: Contribution to journal › Article › Scientific › peer-review

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    2 Citations (Scopus)
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  • A multifrequency study of sub-parsec jets with the Event Horizon Telescope

    Savolainen, T., Ramakrishnan, V., Wiik, K. & Event Horizon Telescope Collaboration, 1 Mar 2025, In: Astronomy and Astrophysics. 695, 21 p., A233.

    Research output: Contribution to journal › Article › Scientific › peer-review

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  • Characterization of Markarian 421 during its most violent year: Multiwavelength variability and correlations

    Lähteenmäki, A., Tornikoski, M., MAGIC Collaboration, VERITAS Collaboration & Fermi Large Area Telescope Collaboration, 1 Feb 2025, In: Astronomy and Astrophysics. 694, 20 p., A195.

    Research output: Contribution to journal › Article › Scientific › peer-review

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  • Gamma-ray flares from the jet of the blazar CTA 102 in 2016–2018

    Kim, S., Lee, S. S., Algaba, J. C., Rani, B., Park, J., Jeong, H. W., Cheong, W. Y., D’Ammando, F., Lähteenmäki, A., Tornikoski, M., Tammi, J., Ramakrishnan, V., Agudo, I., Casadio, C., Escudero, J., Fuentes, A., Traianou, E., Myserlis, I. & Thum, C., 1 Feb 2025, In: Astronomy and Astrophysics. 694, A291.

    Research output: Contribution to journal › Article › Scientific › peer-review

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  • High Optical-to-X-Ray Polarization Ratio Reveals Compton Scattering in BL Lacertae’s Jet

    Agudo, I., Liodakis, I., Otero-Santos, J., Middei, R., Marscher, A., Jorstad, S., Zhang, H., Li, H., Di Gesu, L., Romani, R. W., Kim, D. E., Fenu, F., Marshall, H. L., Pacciani, L., Pedrosa, J. E., Aceituno, F. J., Agís-González, B., Bonnoli, G., Casanova, V. & Morcuende, D. & 130 others, Piirola, V., Sota, A., Kouch, P. M., Lindfors, E., McCall, C., Jermak, H. E., Steele, I. A., Borman, G. A., Grishina, T. S., Hagen-Thorn, V. A., Kopatskaya, E. N., Larionova, E. G., Morozova, D. A., Savchenko, S. S., Shishkina, E. V., Troitskiy, I. S., Troitskaya, Y. V., Vasilyev, A. A., Zhovtan, A. V., Myserlis, I., Gurwell, M., Keating, G., Rao, R., Kang, S., Lee, S. S., Kim, S., Cheong, W. Y., Jeong, H. W., Angelakis, E., Kraus, A., Blinov, D., Maharana, S., Bachev, R., Jormanainen, J., Nilsson, K., Fallah Ramazani, V., Casadio, C., Fuentes, A., Traianou, E., Thum, C., Gómez, J. L., Antonelli, L. A., Bachetti, M., Baldini, L., Baumgartner, W. H., Bellazzini, R., Bianchi, S., Bongiorno, S. D., Bonino, R., Brez, A., Bucciantini, N., Capitanio, F., Castellano, S., Cavazzuti, E., Chen, C. T., Ciprini, S., Costa, E., De Rosa, A., Del Monte, E., Di Lalla, N., Di Marco, A., Donnarumma, I., Doroshenko, V., Dovčiak, M., Ehlert, S. R., Enoto, T., Evangelista, Y., Fabiani, S., Ferrazzoli, R., García, J. A., Gunji, S., Hayashida, K., Heyl, J., Iwakiri, W., Kaaret, P., Karas, V., Kislat, F., Kitaguchi, T., Kolodziejczak, J. J., Krawczynski, H., La Monaca, F., Latronico, L., Maldera, S., Manfreda, A., Marin, F., Marinucci, A., Massaro, F., Matt, G., Mitsuishi, I., Mizuno, T., Muleri, F., Negro, M., Ng, C. Y., O’Dell, S. L., Omodei, N., Oppedisano, C., Papitto, A., Pavlov, G. G., Peirson, A. L., Perri, M., Pesce-Rollins, M., Petrucci, P. O., Pilia, M., Possenti, A., Poutanen, J., Puccetti, S., Ramsey, B. D., Rankin, J., Ratheesh, A., Roberts, O. J., Sgrò, C., Slane, P., Soffitta, P., Spandre, G., Swartz, D. A., Tamagawa, T., Tavecchio, F., Taverna, R., Tawara, Y., Tennant, A. F., Thomas, N. E., Tombesi, F., Trois, A., Tsygankov, S. S., Turolla, R., Vink, J., Weisskopf, M. C., Wu, K., Xie, F. & Zane, S., 20 May 2025, In: Astrophysical Journal Letters. 985, 1, 18 p., L15.

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  • Long-term radio variability of active galactic nuclei at 37 GHz

    Kankkunen, S., Tornikoski, M., Hovatta, T. & Lähteenmäki, A., 1 Jan 2025, In: Astronomy and Astrophysics. 693, 22 p., A318.

    Research output: Contribution to journal › Article › Scientific › peer-review

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  • MOJAVE – XXII. Brightness temperature distributions and geometric profiles along parsec-scale active galactic nucleus jets

    Savolainen, T., Fermi Large Area Telescope Collaboration & MOJAVE Team, 1 Apr 2025, In: Monthly Notices of the Royal Astronomical Society. 538, 3, p. 2008-2030 23 p.

    Research output: Contribution to journal › Article › Scientific › peer-review

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  • Multi-epoch leptohadronic modeling of neutrino source candidate blazar PKS 0735+178

    Omeliukh, A., Garrappa, S., Ramazani, V. F., Franckowiak, A., Winter, W., Lindfors, E., Nilsson, K., Jormanainen, J., Wierda, F., Filippenko, A. V., Zheng, W., Tornikoski, M., Lahteenmaki, A., Kankkunen, S. & Tammi, J., 27 Mar 2025, In: Astronomy & Astrophysics. 695, p. 1-15 15 p., A266.

    Research output: Contribution to journal › Article › Scientific › peer-review

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  • Multiwavelength study of OT 081: broadband modelling of a transitional blazar

    Hovatta, T., Lähteenmäki, A., Tornikoski, M., Fermi Large Area Telescope Collaboration, MWL Collaborators , MAGIC Collaboration & VHE Gamma-ray collaborators, 1 Jun 2025, In: Monthly Notices of the Royal Astronomical Society. 540, 1, p. 364-384 21 p.

    Research output: Contribution to journal › Article › Scientific › peer-review

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  • Optimizing the hunt for extraterrestrial high-energy neutrino counterparts

    Kouch, P. M., Lindfors, E., Hovatta, T., Liodakis, I., Koljonen, K. I. I., Nilsson, K., Jormanainen, J., Fallah Ramazani, V. & Graham, M. J., 4 Apr 2025, In: Astronomy & Astrophysics. 696, p. 1-22 22 p., A73.

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  • PKS 2131−021-Discovery of Strong Coherent Sinusoidal Variations from Radio to Optical Frequencies: Compelling Evidence for a Blazar Supermassive Black Hole Binary

    Kiehlmann, S., de la Parra, P. V., Sullivan, A. G., Synani, A., Liodakis, I., Mróz, P., Næss, S. K., Readhead, A. C. S., Begelman, M. C., Blandford, R. D., Chatziioannou, K., Ding, Y., Graham, M. J., Harrison, F., Homan, D. C., Hovatta, T., Kulkarni, S. R., Lister, M. L., Maiolino, R. & Max-Moerbeck, W. & 14 others, Molina, B., O’Dea, C. P., Pavlidou, V., Pearson, T. J., Aller, M. F., Lawrence, C. R., Lazio, T. J. W., O’Neill, S., Prince, T. A., Ravi, V., Reeves, R. A., Tassis, K., Vallisneri, M. & Zensus, J. A., 20 May 2025, In: Astrophysical Journal. 985, 1, 22 p., 59.

    Research output: Contribution to journal › Article › Scientific › peer-review

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  • Spectral Energy Distribution Variability of the Blazar OJ 287 During 2009-2021

    Zuo, W., Gupta, A. C., Gu, M., Valtonen, M. J., Jorstad, S. G., Aller, M. F., Lahteenmaki, A., Kiehlmann, S., Kushwaha, P., Aller, H. D., Chen, L., Readhead, A. C. S., Tornikoski, M. & Yuan, Q., 1 Feb 2025, In: Astrophysical Journal. 979, 2, 210.

    Research output: Contribution to journal › Article › Scientific › peer-review

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  • The persistent shadow of the supermassive black hole of M87: II. Model comparisons and theoretical interpretations

    Ramakrishnan, V., Savolainen, T. & Event Horizon Telescope Collaboration, 1 Jan 2025, In: Astronomy and Astrophysics. 693, A265.

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  • The polarisation behaviour of OJ 287 viewed through radio, millimetre, and optical observations between 2015 and 2017

    Jormanainen, J., Hovatta, T., Lindfors, E., Berdyugin, A., Chamani, W., Fallah Ramazani, V., Jermak, H., Jorstad, S. G., Lähteenmäki, A., Mccall, C., Nilsson, K., Smith, P., Steele, I. A., Tammi, J., Tornikoski, M. & Wierda, F., 1 Feb 2025, In: Astronomy and Astrophysics. 694, A206.

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  • Time-dependent modelling of short-term variability in the TeV-blazar VER J0521+211 during the major flare in 2020

    MAGIC Collaboration, Feb 2025, In: Astronomy and Astrophysics. 694, A308.

    Research output: Contribution to journal › Article › Scientific › peer-review

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  • Tracking X-Ray Variability in Next-generation EHT Low-luminosity Active Galactic Nucleus Targets

    Ford, N. M., Nowak, M., Ramakrishnan, V., Haggard, D., Dage, K., Nair, D. G. & Chan, C. K., 10 Mar 2025, In: Astrophysical Journal. 981, 2, 14 p., 126.

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  • X-Ray Polarization of the High-synchrotron-peak BL Lacertae Object 1ES 1959+650 during Intermediate and High X-Ray Flux States

    Pacciani, L., Kim, D. E., Middei, R., Marshall, H. L., Marscher, A. P., Liodakis, I., Agudo, I., Jorstad, S. G., Poutanen, J., Errando, M., Di Gesu, L., Negro, M., Tavecchio, F., Wu, K., Chen, C. T., Muleri, F., Antonelli, L. A., Donnarumma, I., Ehlert, S. R. & Massaro, F. & 113 others, O’Dell, S. L., Perri, M., Puccetti, S., Aceituno, F. J., Bonnoli, G., Casanova, V., Escudero, J., Agís-González, B., Husillos, C., Morcuende, D., Otero-Santos, J., Sota, A., Kouch, P. M., Lindfors, E., Borman, G. A., Gómez, J. L., Kopatskaya, E. N., Larionova, E. G., Morozova, D. A., Savchenko, S. S., Vasilyev, A. A., Zhovtan, A. V., Blinov, D., Gourni, A., Kiehlmann, S., Kourtidis, A., Mandarakas, N., Palaiologou, E., Triantafyllou, N., Vervelaki, A., Myserlis, I., Gurwell, M., Keating, G., Rao, R., Angelakis, E., Kraus, A., Bachetti, M., Baldini, L., Baumgartner, W. H., Bellazzini, R., Bianchi, S., Bongiorno, S. D., Bonino, R., Brez, A., Bucciantini, N., Capitanio, F., Castellano, S., Cavazzuti, E., Ciprini, S., Costa, E., De Rosa, A., Del Monte, E., Di Lalla, N., Di Marco, A., Doroshenko, V., Dovčiak, M., Enoto, T., Evangelista, Y., Fabiani, S., Ferrazzoli, R., Garcia, J. A., Gunji, S., Hayashida, K., Heyl, J., Iwakiri, W., Kaaret, P., Karas, V., Kislat, F., Kitaguchi, T., Kolodziejczak, J. J., Krawczynski, H., La Monaca, F., Latronico, L., Maldera, S., Manfreda, A., Marin, F., Marinucci, A., Matt, G., Mitsuishi, I., Mizuno, T., Ng, C. Y., Omodei, N., Oppedisano, C., Papitto, A., Pavlov, G. G., Peirson, A. L., Pesce-Rollins, M., Petrucci, P. O., Pilia, M., Possenti, A., Ramsey, B. D., Rankin, J., Ratheesh, A., Roberts, O. J., Romani, R. W., Sgró, C., Slane, P., Soffitta, P., Spandre, G., Swartz, D. A., Tamagawa, T., Taverna, R., Tawara, Y., Tennant, A. F., Thomas, N. E., Tombesi, F., Trois, A., Tsygankov, S. S., Turolla, R., Vink, J., Weisskopf, M. C., Xie, F. & Zane, S., 10 Apr 2025, In: Astrophysical Journal. 983, 1, 78.

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  • 2024

    A detection of the 22P3/2−22S1/2 fine-structure transition of hydrogen in the radio spectrum of the Sun?

    Lehtinen, K., Kallunki, J. & Kallio, E., Aug 2024, In: Astrophysics and Space Science. 369, 8, 86.

    Research output: Contribution to journal › Article › Scientific › peer-review

  • A Kpc-scale radio polarization study of PG BL Lacs with the uGMRT

    Baghel, J., Kharb, P., Hovatta, T., Gulati, S., Lindfors, E. & Silpa, S., 1 Jan 2024, In: Monthly Notices of the Royal Astronomical Society. 527, 1, p. 672-688 17 p.

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  • A multifrequency view on the characteristics and evolution of narrow-line Seyfert 1 galaxies

    Varglund, I., 2024, Aalto University. 228 p.

    Research output: Thesis › Doctoral Thesis › Collection of Articles

    Open Access

  • A near magnetic-to-kinetic energy equipartition flare from the relativistic jet in AO 0235 + 164 during 2013–2019

    Cheong, W. Y., Lee, S. S., Kim, S. H., Kang, S., Kim, J. Y., Rani, B., Readhead, A. C. S., Kiehlmann, S., Lähteenmäki, A., Tornikoski, M., Tammi, J., Ramakrishnan, V., Agudo, I., Fuentes, A., Traianou, E., Escudero, J., Thum, C., Myserlis, I., Casadio, C. & Gurwell, M., 1 Jan 2024, In: Monthly Notices of the Royal Astronomical Society. 527, 1, p. 882-894 13 p.

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  • Association of the IceCube neutrinos with blazars in the CGRaBS sample

    Kouch, P. M., Lindfors, E., Hovatta, T., Liodakis, I., Koljonen, K. I. I., Nilsson, K., Kiehlmann, S., Max-Moerbeck, W., Readhead, A. C. S., Reeves, R. A., Pearson, T. J., Jormanainen, J., Ramazani, V. F. & Graham, M. J., 1 Oct 2024, In: Astronomy and Astrophysics. 690, A111.

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  • Cross-Polarization Gain Calibration of Linearly Polarized VLBI Antennas by Observations of 4C 39.25

    Jaron, F., Martí-Vidal, I., Schartner, M., González-García, J., Albentosa-Ruiz, E., Bernhart, S., Böhm, J., Gruber, J., Modiri, S., Nothnagel, A., Pérez-Díez, V., Savolainen, T., Soja, B., Varenius, E. & Xu, M. H., Apr 2024, In: Radio Science. 59, 4, e2023RS007892.

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  • Dark matter line searches with the Cherenkov Telescope Array

    Hovatta, T. & The CTAO Consortium, 1 Jul 2024, In: Journal of Cosmology and Astroparticle Physics. 2024, 7, 047.

    Research output: Contribution to journal › Article › Scientific › peer-review

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  • Distance estimation of gamma-ray-emitting BL Lac objects from imaging observations

    Nilsson, K., Fallah Ramazani, V., Lindfors, E., Goldoni, P., Becerra González, J., Acosta Pulido, J. A., Clavero, R., Otero-Santos, J., Pursimo, T., Pita, S., Kouch, P. M., Boisson, C., Backes, M., Cotter, G., D'Ammando, F. & Kasai, E., 1 Nov 2024, In: Astronomy and Astrophysics. 691, A154.

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  • Distinguishing radiation mechanisms and particle populations in blazar jets through long-term multiband monitoring with RINGO3 and Fermi

    McCall, C., Jermak, H., Steele, I. A., Agudo, I., de Almeida, U. B., Hovatta, T., Lamb, G. P., Lindfors, E. & Mundell, C., 1 Aug 2024, In: Monthly Notices of the Royal Astronomical Society. 532, 2, p. 2788-2819 32 p.

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  • Evidence of a toroidal magnetic field in the core of 3C 84

    Paraschos, G. F., Debbrecht, L. C., Kramer, J. A., Traianou, E., Liodakis, I., Krichbaum, T. P., Kim, J. Y., Janssen, M., Nair, D. G., Savolainen, T., Ros, E., Bach, U., Hodgson, J. A., Lisakov, M., Macdonald, N. R. & Zensus, J. A., 1 Jun 2024, In: Astronomy and Astrophysics. 686, L5.

    Research output: Contribution to journal › Article › Scientific › peer-review

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  • First characterization of the emission behavior of Mrk 421 from radio to very high-energy gamma rays with simultaneous X-ray polarization measurements

    Abe, S., Abhir, J., Acciari, V. A., Agudo, I., Aniello, T., Ansoldi, S., Antonelli, L. A., Arbet-Engels, A., Arcaro, C., Artero, M., Asano, K., Babić, A., Baquero, A., de Almeida, U. B., Barrio, J. A., Batković, I., Baxter, J., González, J. B., Bednarek, W. & Bernardini, E. & 234 others, Bernete, J., Berti, A., Besenrieder, J., Bigongiari, C., Biland, A., Blanch, O., Bonnoli, G., Bošnjak, Burelli, I., Busetto, G., Campoy-Ordaz, A., Carosi, A., Carosi, R., Carretero-Castrillo, M., Castro-Tirado, A. J., Ceribella, G., Chai, Y., Cifuentes, A., Cikota, S., Colombo, E., Contreras, J. L., Cortina, J., Covino, S., D'Ammando, F., D'Amico, G., D'Elia, V., Da Vela, P., Dazzi, F., De Angelis, A., De Lotto, B., de Menezes, R., Del Popolo, A., Delgado, J., Mendez, C. D., Di Pierro, F., Di Venere, L., Prester, D. D., Donini, A., Dorner, D., Doro, M., Elsaesser, D., Emery, G., Escudero, J., Fariña, L., Fattorini, A., Foffano, L., Font, L., Fröse, S., Fukami, S., Fukazawa, Y., López, R. J. G., Garczarczyk, M., Gasparyan, S., Gaug, M., Paiva, J. G. G., Giglietto, N., Giordano, F., Gliwny, P., Godinović, N., Gradetzke, T., Grau, R., Green, D., Green, J. G., Günther, P., Hadasch, D., Hahn, A., Hassan, T., Heckmann, L., Herrera, J., Hrupec, D., Hütten, M., Imazawa, R., Inada, T., Ishio, K., Martínez, I. J., Jormanainen, J., Kerszberg, D., Kluge, G. W., Kobayashi, Y., Kouch, P. M., Kubo, H., Kushida, J., Lezáun, M. L., Lamastra, A., Leone, F., Lindfors, E., Linhoff, L., Lombardi, S., Longo, F., López-Coto, R., López-Moya, M., López-Oramas, A., Loporchio, S., Lorini, A., de Oliveira Fraga, B. M., Majumdar, P., Makariev, M., Maneva, G., Mang, N., Manganaro, M., Mangano, S., Mannheim, K., Mariotti, M., Martínez, M., Martínez-Chicharro, M., Mas-Aguilar, A., Mazin, D., Menchiari, S., Mender, S., Miceli, D., Miener, T., Miranda, J. M., Mirzoyan, R., González, M. M., Molina, E., Mondal, H. A., Moralejo, A., Morcuende, D., Nakamori, T., Nanci, C., Nava, L., Neustroev, V., Nickel, L., Rosillo, M. N., Nigro, C., Nikolić, L., Nilsson, K., Nishijima, K., Ekoume, T. N., Noda, K., Nozaki, S., Ohtani, Y., Okumura, A., Otero-Santos, J., Paiano, S., Palatiello, M., Paneque, D., Paoletti, R., Paredes, J. M., Pavlović, D., Peresano, M., Persic, M., Pihet, M., Pirola, G., Podobnik, F., Moroni, P. G. P., Prandini, E., Principe, G., Priyadarshi, C., Rhode, W., Ribó, M., Rico, J., Righi, C., Sahakyan, N., Saito, T., Satalecka, K., Saturni, F. G., Schleicher, B., Schmidt, K., Schmuckermaier, F., Schubert, J. L., Schweizer, T., Sciaccaluga, A., Sitarek, J., Sliusar, V., Sobczynska, D., Stamerra, A., Strišković, J., Strom, D., Strzys, M., Suda, Y., Suutarinen, S., Tajima, H., Takahashi, M., Tavecchio, F., Tavecchio, F., Temnikov, P., Terauchi, K., Terzić, T., Teshima, M., Tosti, L., Truzzi, S., Tutone, A., Ubach, S., van Scherpenberg, J., Acosta, M. V., Ventura, S., Viale, I., Vigorito, C. F., Vitale, V., Vovk, I., Walter, R., Will, M., Wunderlich, C., Yamamoto, T., Liodakis, I., Jorstad, S. G., Di Gesu, L., Donnarumma, I., Kim, D. E., Marscher, A. P., Middei, R., Perri, M., Puccetti, S., Verrecchia, F., Leto, C., De La Calle Pérez, I., Jiménez-Bailón, E., Blinov, D., Bourbah, I. G., Kiehlmann, S., Kontopodis, E., Mandarakas, N., Skalidis, R., Vervelaki, A., Aceituno, F. J., Agís-González, B., Sota, A., Sasada, M., Fukazawa, Y., Kawabata, K. S., Uemura, M., Mizuno, T., Akitaya, H., Casadio, C., Myserlis, I., Sievers, A., Lähteenmäki, A., Syrjärinne, I., Tornikoski, M., Salomé, Q., Gurwell, M., Keating, G. K. & Rao, R., 1 Apr 2024, In: Astronomy and Astrophysics. 684, A127.

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  • First Sagittarius A∗ Event Horizon Telescope Results. VII. Polarization of the Ring

    Akiyama, K., Alberdi, A., Alef, W., Algaba, J. C., Anantua, R., Asada, K., Azulay, R., Bach, U., Baczko, A. K., Ball, D., Baloković, M., Bandyopadhyay, B., Barrett, J., Bauböck, M., Benson, B. A., Bintley, D., Blackburn, L., Blundell, R., Bouman, K. L. & Bower, G. C. & 31 others, Boyce, H., Bremer, M., Brinkerink, C. D., Brissenden, R., Britzen, S., Broderick, A. E., Broguiere, D., Bronzwaer, T., Bustamante, S., Byun, D. Y., Carlstrom, J. E., Ceccobello, C., Chael, A., Chan, C. K., Chang, D. O., Chatterjee, K., Chatterjee, S., Chen, M. T., Chen, Y., Cheng, X., Cho, I., Christian, P., Conroy, N. S., Kim, D. J., Li, Z., Ramakrishnan, V., Savolainen, T., Wagner, J., Washington, J. E., Wiik, K. & Event Horizon Telescope Collaboration, 1 Apr 2024, In: Astrophysical Journal Letters. 964, 2, p. 1-32 32 p., L25.

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  • First Sagittarius A∗ Event Horizon Telescope Results. VIII. Physical Interpretation of the Polarized Ring

    Ramakrishnan, V., Savolainen, T. & Event Horizon Telescope Collaboration, 1 Apr 2024, In: Astrophysical Journal Letters. 964, 2, L26.

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  • First Very Long Baseline Interferometry Detections at 870 μm

    Raymond, A. W., Doeleman, S. S., Asada, K., Blackburn, L., Bower, G. C., Bremer, M., Broguiere, D., Chen, M. T., Crew, G. B., Dornbusch, S., Fish, V. L., García, R., Gentaz, O., Goddi, C., Han, C. C., Hecht, M. H., Huang, Y. D., Janssen, M., Keating, G. K. & Koay, J. Y. & 258 others, Krichbaum, T. P., Lo, W. P., Matsushita, S., Matthews, L. D., Moran, J. M., Norton, T. J., Patel, N., Pesce, D. W., Ramakrishnan, V., Rottmann, H., Roy, A. L., Sánchez, S., Tilanus, R. P. J., Titus, M., Torne, P., Wagner, J., Weintroub, J., Wielgus, M., Young, A., Akiyama, K., Albentosa-Ruíz, E., Alberdi, A., Alef, W., Algaba, J. C., Anantua, R., Azulay, R., Bach, U., Baczko, A. K., Ball, D., Balokovic, M., Bandyopadhyay, B., Barrett, J., Bauböck, M., Benson, B. A., Bintley, D., Blundell, R., Bouman, K. L., Boyce, H., Brissenden, R., Britzen, S., Broderick, A. E., Bronzwaer, T., Bustamante, S., Carlstrom, J. E., Chael, A., Chan, C. K., Chang, D. O., Chatterjee, K., Chatterjee, S., Chen, Y., Cheng, X., Cho, I., Christian, P., Conroy, N. S., Conway, J. E., Crawford, T. M., Cruz-Osorio, A., Cui, Y., Dahale, R., Davelaar, J., De Laurentis, M., Deane, R., Dempsey, J., Desvignes, G., Dexter, J., Dhruv, V., Dihingia, I. K., Dzib, S. A., Eatough, R. P., Emami, R., Falcke, H., Farah, J., Fomalont, E., Fontana, A. L., Ford, H. A., Foschi, M., Fraga-Encinas, R., Freeman, W. T., Friberg, P., Fromm, C. M., Fuentes, A., Galison, P., Gammie, C. F., Georgiev, B., Gold, R., Gómez-Ruiz, A. I., Gómez, J. L., Gu, M., Gurwell, M., Hada, K., Haggard, D., Hesper, R., Heumann, D., Ho, L. C., Ho, P., Honma, M., Huang, C. W. L., Huang, L., Hughes, D. H., Ikeda, S., Impellizzeri, C. M. V., Inoue, M., Issaoun, S., James, D. J., Jannuzi, B. T., Jeter, B., Jiang, W., Jiménez-Rosales, A., Johnson, M. D., Jorstad, S., Jones, A. C., Joshi, A. V., Jung, T., Karuppusamy, R., Kawashima, T., Kettenis, M., Kim, D. J., Kim, J. Y., Kim, J., Kim, J., Kino, M., Kocherlakota, P., Kofuji, Y., Koch, P. M., Koyama, S., Kramer, C., Kramer, J. A., Kramer, M., Kubo, D., Kuo, C. Y., La Bella, N., Lee, S. S., Levis, A., Li, Z., Lico, R., Lindahl, G., Lindqvist, M., Lisakov, M., Liu, J., Liu, K., Liuzzo, E., Lobanov, A. P., Loinard, L., Lonsdale, C. J., Lowitz, A. E., Lu, R. S., MacDonald, N. R., Mahieu, S., Maier, D., Mao, J., Marchili, N., Markoff, S., Marrone, D. P., Marscher, A. P., Martí-Vidal, I., Medeiros, L., Menten, K. M., Mizuno, I., Mizuno, Y., Montgomery, J., Moriyama, K., Moscibrodzka, M., Mulaudzi, W., Müller, C., Müller, H., Mus, A., Musoke, G., Myserlis, I., Nagai, H., Nagar, N. M., Nakamura, M., Narayanan, G., Natarajan, I., Nathanail, A., Fuentes, S. N., Neilsen, J., Ni, C., Nowak, M. A., Oh, J., Okino, H., Olivares Sánchez, H. R., Oyama, T., Özel, F., Palumbo, D. C. M., Paraschos, G. F., Park, J., Parsons, H., Pen, U. L., Piétu, V., PopStefanija, A., Porth, O., Prather, B., Principe, G., Psaltis, D., Pu, H. Y., Raffin, P. A., Rao, R., Rawlings, M. G., Ricarte, A., Ripperda, B., Roelofs, F., Romero-Cañizales, C., Ros, E., Roshanineshat, A., Ruiz, I., Ruszczyk, C., Rygl, K. L. J., Sánchez-Argüelles, D., Sánchez-Portal, M., Sasada, M., Satapathy, K., Savolainen, T., Schloerb, F. P., Schonfeld, J., Schuster, K. F., Shao, L., Shen, Z., Small, D., Sohn, B. W., SooHoo, J., Sosapanta Salas, L. D., Souccar, K., Stanway, J. S., Sun, H., Tazaki, F., Tetarenko, A. J., Tiede, P., Toma, K., Toscano, T., Traianou, E., Trent, T., Trippe, S., Turk, M., van Bemmel, I., van Langevelde, H. J., van Rossum, D. R., Vos, J., Ward-Thompson, D., Wardle, J., Washington, J. E., Wharton, R., Wiik, K., Witzel, G., Wondrak, M. F., Wong, G. N., Wu, Q., Yadlapalli, N., Yamaguchi, P., Yfantis, A., Yoon, D., Younsi, Z., Yu, W., Yuan, F., Yuan, Y. F., Zensus, J. A., Zhang, S., Zhao, G. Y. & Zhao, S. S., 1 Sept 2024, In: Astronomical Journal. 168, 3, 130.

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  • Galaxy group-associated distances to very high energy gamma-ray emitting BL Lacs KUV 00311-1938 and S2 0109+22

    Koljonen, K. I. I., Lindfors, E., Nilsson, K., Heinämäki, P. & Kotilainen, J. K., 25 Jun 2024, In: Monthly Notices of the Royal Astronomical Society. 531, 4, p. 5084-5096 13 p.

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  • Host galaxy of low-luminosity compact sources

    Vietri, A., Berton, M., Järvelä, E., Kunert-Bajraszewska, M., Ciroi, S., Varglund, I., Dalla Barba, B., Sani, E. & Crepaldi, L., 1 Sept 2024, In: Astronomy and Astrophysics. 689, A123.

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  • Insights into the broadband emission of the TeV blazar Mrk 501 during the first X-ray polarization measurements

    Lähteenmäki, A., Salomé, Q., Syrjärinne, I., Tornikoski, M., MAGIC Collaboration & Multi-wavelength Collaborators, 1 May 2024, In: Astronomy and Astrophysics. 685, A117.

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  • Intermediate-luminosity Type IIP SN 2021gmj : a low-energy explosion with signatures of circumstellar material

    Murai, Y., Tanaka, M., Kawabata, M., Taguchi, K., Teja, R. S., Nakaoka, T., Maeda, K., Kawabata, K. S., Nagao, T., Moriya, T. J., Sahu, D. K., Anupama, G. C., Tominaga, N., Morokuma, T., Imazawa, R., Inutsuka, S., Isogai, K., Kasuga, T., Kobayashi, N. & Kondo, S. & 11 others, Maehara, H., Mori, Y., Niino, Y., Ogawa, M., Ohsawa, R., Okumura, S. I., Saito, S., Sako, S., Takahashi, H., Uno, K. & Yamanaka, M., 1 Mar 2024, In: Monthly Notices of the Royal Astronomical Society. 528, 3, p. 4209-4227 19 p.

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  • Investigating Differences in the Palomar-Green Blazar Population Using Polarization

    Baghel, J., Kharb, P., Hovatta, T., Ho, L. C., Harrison, C., Lindfors, E., Silpa, S. & Gulati, S., 1 Dec 2024, In: Astrophysical Journal. 977, 2, 192.

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  • IXPE observation of PKS 2155-304 reveals the most highly polarized blazar

    Kouch, P. M., Liodakis, I., Middei, R., Kim, D. E., Tavecchio, F., Marscher, A. P., Marshall, H. L., Ehlert, S. R., Di Gesu, L., Jorstad, S. G., Agudo, I., Madejski, G. M., Romani, R. W., Errando, M., Lindfors, E., Nilsson, K., Toppari, E., Potter, S. B., Imazawa, R. & Sasada, M. & 116 others, Fukazawa, Y., Kawabata, K. S., Uemura, M., Mizuno, T., Nakaoka, T., Akitaya, H., Mccall, C., Jermak, H. E., Steele, I. A., Myserlis, I., Gurwell, M., Keating, G. K., Rao, R., Kang, S., Lee, S. S., Kim, S. H., Cheong, W. Y., Jeong, H. W., Angelakis, E., Kraus, A., Aceituno, F. J., Bonnoli, G., Casanova, V., Escudero, J., Agís-González, B., Husillos, C., Morcuende, D., Otero-Santos, J., Sota, A., Bachev, R., Antonelli, L. A., Bachetti, M., Baldini, L., Baumgartner, W. H., Bellazzini, R., Bianchi, S., Bongiorno, S. D., Bonino, R., Brez, A., Bucciantini, N., Capitanio, F., Castellano, S., Cavazzuti, E., Chen, C. T., Ciprini, S., Costa, E., De Rosa, A., Del Monte, E., Di Lalla, N., Di Marco, A., Donnarumma, I., Doroshenko, V., Dovčiak, M., Enoto, T., Evangelista, Y., Fabiani, S., Ferrazzoli, R., Garcia, J. A., Gunji, S., Hayashida, K., Heyl, J., Iwakiri, W., Kaaret, P., Karas, V., Kislat, F., Kitaguchi, T., Kolodziejczak, J. J., Krawczynski, H., La Monaca, F., Latronico, L., Maldera, S., Manfreda, A., Marin, F., Marinucci, A., Massaro, F., Matt, G., Mitsuishi, I., Muleri, F., Negro, M., Ng, C. Y., O'dell, S. L., Omodei, N., Oppedisano, C., Papitto, A., Pavlov, G. G., Peirson, A. L., Perri, M., Pesce-Rollins, M., Petrucci, P. O., Pilia, M., Possenti, A., Poutanen, J., Puccetti, S., Ramsey, B. D., Rankin, J., Ratheesh, A., Roberts, O. J., Sgrò, C., Slane, P., Soffitta, P., Spandre, G., Swartz, D. A., Tamagawa, T., Taverna, R., Tawara, Y., Tennant, A. F., Thomas, N. E., Tombesi, F., Trois, A., Tsygankov, S. S., Turolla, R., Vink, J., Weisskopf, M. C., Wu, K., Xie, F. & Zane, S., 1 Sept 2024, In: Astronomy and Astrophysics. 689, p. 1-17 17 p., A119.

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  • Long-term study of the intermittent extreme behaviour of 1ES 2344+514

    Arbet Engels, A., Mondal, H. A., Fukami, S., D’Ammando, F., Dorner, D., Chatterjee, R., Majumdar, P., Manganaro, M., Hovatta, T., Das, S., Raiteri, C. M., Villata, M., Perri, M., Verrechia, F., Leto, C., Filippenko, A., Zheng, W. & MAGIC Collaboration, 27 Sept 2024, In: Proceedings of Science. 444, 788.

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  • Mitigating the effect of source structure in geodetic VLBI by re-weighting observations using closure delays and baseline-to-jet orientation

    Kareinen, N., Zubko, N., Savolainen, T., Xu, M. H. & Poutanen, M., 9 May 2024, In: Journal of Geodesy. 98, 5, p. 1-22 22 p., 38.

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  • Multiwavelength observations of the lensed quasar PKS 1830-211 during the 2019 γ-ray flare

    Vercellone, S., Donnarumma, I., Pittori, C., Capitanio, F., De Rosa, A., Di Gesu, L., Kiehlmann, S., Iacolina, M. N., Pellizzoni, P. A., Egron, E., Pacciani, L., Piano, G., Puccetti, S., Righini, S., Valente, G., Verrecchia, F., Vittorini, V., Tavani, M., Brocato, E. & Chen, A. W. & 15 others, Hovatta, T., Melis, A., Max-Moerbeck, W., Perrodin, D., Pilia, M., Pili, M., Readhead, A. C. S., Reeves, R., Ridolfi, A., Vitali, F., Bulgarelli, A., Cattaneo, P. W., Lucarelli, F., Morselli, A. & Trois, A., 1 Jan 2024, In: Monthly Notices of the Royal Astronomical Society. 527, 3, p. 5717-5731 15 p.

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  • Multi-year characterisation of the broad-band emission from the intermittent extreme BL Lac 1ES 2344+514

    Hovatta, T., MAGIC Collaboration & Multi-wavelength Collaborators, 1 Feb 2024, In: Astronomy and Astrophysics. 682, A114.

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  • Ordered magnetic fields around the 3C 84 central black hole

    Paraschos, G. F., Kim, J. Y., Wielgus, M., Röder, J., Krichbaum, T. P., Ros, E., Agudo, I., Myserlis, I., Moscibrodzka, M., Traianou, E., Zensus, J. A., Blackburn, L., Chan, C. K., Issaoun, S., Janssen, M., Johnson, M. D., Fish, V. L., Akiyama, K., Alberdi, A. & Alef, W. & 263 others, Algaba, J. C., Anantua, R., Asada, K., Azulay, R., Bach, U., Baczko, A. K., Ball, D., Baloković, M., Barrett, J., Bauböck, M., Benson, B. A., Bintley, D., Blundell, R., Bouman, K. L., Bower, G. C., Boyce, H., Bremer, M., Brinkerink, C. D., Brissenden, R., Britzen, S., Broderick, A. E., Broguiere, D., Bronzwaer, T., Bustamante, S., Byun, D. Y., Carlstrom, J. E., Ceccobello, C., Chael, A., Chang, D. O., Chatterjee, K., Chatterjee, S., Chen, M. T., Chen, Y., Cheng, X., Cho, I., Christian, P., Conroy, N. S., Conway, J. E., Cordes, J. M., Crawford, T. M., Crew, G. B., Cruz-Osorio, A., Cui, Y., Dahale, R., Davelaar, J., De Laurentis, M., Deane, R., Dempsey, J., Desvignes, G., Dexter, J., Dhruv, V., Doeleman, S. S., Dougal, S., Dzib, S. A., Eatough, R. P., Emami, R., Falcke, H., Farah, J., Fomalont, E., Ford, H. A., Foschi, M., Fraga-Encinas, R., Freeman, W. T., Friberg, P., Fromm, C. M., Fuentes, A., Galison, P., Gammie, C. F., García, R., Gentaz, O., Georgiev, B., Goddi, C., Gold, R., Gómez-Ruiz, A. I., Gómez, J. L., Gu, M., Gurwell, M., Hada, K., Haggard, D., Haworth, K., Hecht, M. H., Hesper, R., Heumann, D., Ho, L. C., Ho, P., Honma, M., Huang, C. L., Huang, L., Hughes, D. H., Ikeda, S., Impellizzeri, C. M. V., Inoue, M., James, D. J., Jannuzi, B. T., Jeter, B., Jaing, W., Jiménez-Rosales, A., Jorstad, S., Joshi, A. V., Jung, T., Karami, M., Karuppusamy, R., Kawashima, T., Keating, G. K., Kettenis, M., Kim, D. J., Kim, J., Kim, J., Kino, M., Koay, J. Y., Kocherlakota, P., Kofuji, Y., Koch, P. M., Koyama, S., Kramer, C., Kramer, J. A., Kramer, M., Kuo, C. Y., La Bella, N., Lauer, T. R., Lee, D., Lee, S. S., Leung, P. K., Levis, A., Li, Z., Lico, R., Lindahl, G., Lindqvist, M., Lisakov, M., Liu, J., Liu, K., Liuzzo, E., Lo, W. P., Lobanov, A. P., Loinard, L., Lonsdale, C. J., Lowitz, A. E., Lu, R. S., MacDonald, N. R., Mao, J., Marchili, N., Markoff, S., Marrone, D. P., Marscher, A. P., Martí-Vidal, I., Matsushita, S., Matthews, L. D., Medeiros, L., Menten, K. M., Michalik, D., Mizuno, I., Mizuno, Y., Moran, J. M., Moriyama, K., Mulaudzi, W., Müller, C., Müller, H., Mus, A., Musoke, G., Nadolski, A., Nagai, H., Nagar, N. M., Nakamura, M., Narayanan, G., Natarajan, I., Nathanail, A., Navarro Fuentes, S., Neilsen, J., Neri, R., Ni, C., Noutsos, A., Nowak, M. A., Oh, J., Okino, H., Olivares, H., Ortiz-León, G. N., Oyama, T., ÖZel, F., Palumbo, D. C. M., Park, J., Parsons, H., Patel, N., Pen, U. L., Piétu, V., Plambeck, R., Popstefanija, A., Porth, O., Pötzl, F. M., Prather, B., Preciado-López, J. A., Psaltis, D., Pu, H. Y., Ramakrishnan, V., Rao, R., Rawlings, M. G., Raymond, A. W., Rezzolla, L., Ricarte, A., Ripperda, B., Roelofs, F., Rogers, A., Romero-Cañizales, C., Roshanineshat, A., Rottmann, H., Roy, A. L., Ruiz, I., Ruszczyk, C., Rygl, K. L. J., Sánchez, S., Sánchez-Argüelles, D., Sánchez-Portal, M., Sasada, M., Satapathy, K., Savolainen, T., Schloerb, F. P., Schonfeld, J., Schuster, K., Shao, L., Shen, Z., Small, D., Sohn, B. W., Soohoo, J., Sosapanta Salas, L. D., Souccar, K., Sun, H., Tazaki, F., Tetarenko, A. J., Tiede, P., Tilanus, R. P. J., Titus, M., Torne, P., Toscano, T., Trent, T., Trippe, S., Turk, M., Van Bemmel, I., Van Langevelde, H. J., Van Rossum, D. R., Vos, J., Wagner, J., Ward-Thompson, D., Wardle, J., Washington, J. E., Weintroub, J., Wharton, R., Wiik, K., Witzel, G., Wondrak, M. F., Wong, G. N., Wu, Q., Yadlapalli, N., Yamaguchi, P., Yfantis, A., Yoon, D., Young, A., Young, K., Younsi, Z., Yu, W., Yuan, F., Yuan, Y. F., Zhang, S., Zhao, G. Y. & Zhao, S. S., 1 Feb 2024, In: Astronomy and Astrophysics. 682, 15 p., L3.

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  • Physical conditions in Centaurus A’s northern filaments II. Does the HCO+ emission highlight the presence of shocks?

    Salomé, Q., Salomé, P., Godard, B., Guillard, P. & Gusdorf, A., 1 Oct 2024, In: Astronomy and Astrophysics. 690, L18.

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  • Revisiting Radio Variability of the Blazar 3C 454.3

    Tripathi, A., Gupta, A. C., Smith, K. L., Wiita, P. J., Aller, M. F., Volvach, A. E., Lahteenmaki, A., Aller, H. D., Tornikoski, M. & Volvach, L. N., 1 Dec 2024, In: Astrophysical Journal. 977, 2, 166.

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  • Searches for Neutrinos in the Direction of Radio-bright Blazars with the ANTARES Telescope

    Hovatta, T., ANTARES Collaboration & OVRO Collaboration, 1 Mar 2024, In: Astrophysical Journal. 964, 1, 3.

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  • The enigmatic double-peaked stripped-envelope SN 2023aew

    Kangas, T., Kuncarayakti, H., Nagao, T., Kotak, R., Kankare, E., Fraser, M., Stevance, H., Mattila, S., Maeda, K., Stritzinger, M., Lundqvist, P., Elias-Rosa, N., Ferrari, L., Folatelli, G., Frohmaier, C., Galbany, L., Kawabata, M., Koutsiona, E., Müller-Bravo, T. E. & Piscarreta, L. & 12 others, Pursiainen, M., Singh, A., Taguchi, K., Teja, R. S., Valerin, G., Pastorello, A., Benetti, S., Cai, Y. Z., Charalampopoulos, P., Gutiérrez, C. P., Kravtsov, T. & Reguitti, A., 1 Sept 2024, In: Astronomy and Astrophysics. 689, A182.

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  • The impact of improved estimates of radio star astrometric models on the alignment of the Gaia bright reference frame to ICRF3

    Lunz, S., Anderson, J. M., Xu, M. H., Heinkelmann, R., Titov, O., Lestrade, J. F., Johnson, M. C., Shu, F., Chen, W., Melnikov, A., Mikhailov, A., Mccallum, J., Lopez, Y., De Vicente Abad, P. & Schuh, H., 1 Sept 2024, In: Astronomy and Astrophysics. 689, A134.

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  • The metamorphosis of the Type Ib SN 2019yvr: late-time interaction

    Ferrari, L., Folatelli, G., Kuncarayakti, H., Stritzinger, M., Maeda, K., Bersten, M., Román Aguilar, L. M., Sáez, M. M., Dessart, L., Lundqvist, P., Mazzali, P., Nagao, T., Ashall, C., Bose, S., Brennan, S. J., Cai, Y., Handberg, R., Holmbo, S., Karamehmetoglu, E. & Pastorello, A. & 15 others, Reguitti, A., Anderson, J., Chen, T. W., Galbany, L., Gromadzki, M., Gutiérrez, C. P., Inserra, C., Kankare, E., Müller Bravo, T. E., Mattila, S., Nicholl, M., Pignata, G., Sollerman, J., Srivastav, S. & Young, D. R., 1 Mar 2024, In: Monthly Notices of the Royal Astronomical Society: Letters. 529, 1, p. L33-L40

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  • The persistent shadow of the supermassive black hole of M 87: I. Observations, calibration, imaging, and analysis*

    Akiyama, K., Alberdi, A., Alef, W., Algaba, J. C., Anantua, R., Asada, K., Azulay, R., Bach, U., Baczko, A. K., Ball, D., Baloković, M., Bandyopadhyay, B., Barrett, J., Bauböck, M., Benson, B. A., Bintley, D., Blackburn, L., Blundell, R., Bouman, K. L. & Bower, G. C. & 31 others, Boyce, H., Bremer, M., Brissenden, R., Britzen, S., Broderick, A. E., Broguiere, D., Bronzwaer, T., Bustamante, S., Carlstrom, J. E., Chael, A., Chan, C. K., Chang, D. O., Chatterjee, K., Chatterjee, S., Chen, M. T., Chen, Y., Cheng, X., Cho, I., Christian, P., Conroy, N. S., Conway, J. E., Crawford, T. M., Crew, G. B., Cruz-Osorio, A., Cui, Y., Dahale, R., Davelaar, J., Ramakrishnan, V., Savolainen, T., Wiik, K. & Event Horizon Telescope Collaboration, 18 Jan 2024, In: Astronomy and Astrophysics. 681, 63 p., A79.

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