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Metsähovi Radio Observatory

School of Electrical Engineering

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    Metsähovintie 114

    Kylmälä (Kirkkonummi)

    02540

    Finland

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  • 2026

    A long-term multiwavelength study of the flat spectrum radio quasar OP 313

    Bartolini, C., Lindfors, E., Tramacere, A., Giroletti, M., Cerasole, D., Agudo, I., Angelakis, E., Bissaldi, E., Casaburo, F., D’Ammando, F., Di Venere, L., Fallah Ramazani, V., Giacchino, F., Giordano, F., Gurwell, M., Jormanainen, J., Jorstad, S., Keating, G., Kouch, P. M. & Kraus, A. & 8 others, Lähteenmäki, A., Loporchio, S., Marchili, N., Marscher, A., Myserlis, I., Rao, R., Righini, S. & Tornikoski, M., 1 Mar 2026, In: Astronomy and Astrophysics. 707, A136.

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  • An X-ray and optical spectral study of the changing-look narrow-line Seyfert 1 2MASX J0413-0050

    Vietri, A., Tortosa, A., Ilić, D., Ciroi, S., Berton, M., Järvelä, E., Ricci, C., Sani, E., Crepaldi, L., Dalla Barba, B., Chen, S., Congiu, E., Condò, P., Varglund, I. & Rodighiero, G., Jun 2026, In: Astronomy and Astrophysics. 710, 14 p., A413.

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  • A Search for Supermassive Black Hole Binary Candidates in 46 yr Radio Light Curves of 83 Blazars

    Molina, B., Mroz, P., De la Parra, P. V., Readhead, A. C. S., Surti, T., Aller, M. F., Scargle, J. D., Reeves, R. A., Aller, H., Begelman, M. C., Blandford, R. D., Ding, Y., Graham, M. J., Harrison, F., Hovatta, T., Liodakis, I., Lister, M. L., Max-Moerbeck, W., Pavlidou, V. & Pearson, T. J. & 6 others, Ravi, V., Sullivan, A. G., Synani, A., Tassis, K., Tremblay, S. E. & Zensus, J. A., 20 Mar 2026, In: Astrophysical Journal. 1000, 1, p. 1-16 16 p., 72.

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  • Compelling Evidence for a Harmonic in the Light Curve of the Supermassive Black Hole Binary Candidate PKS J1309+1154

    Readhead, A. C. S., Aller, M. F., Sullivan, A. G., Blandford, R. D., Mroz, P., De La Parra, P. V., Molina, B., Most, E. R., Synani, A., Aller, H., Begelman, M. C., Ding, Y., Graham, M. J., Harrison, F., Hovatta, T., Liodakis, I., Max-Moerbeck, W., Pavlidou, V., Pearson, T. J. & Ravi, V. & 5 others, Reeves, R. A., Surti, T., Tassis, K., Tremblay, S. E. & Zensus, J. A., 10 Jan 2026, In: Astrophysical Journal Letters. 996, 2, 10 p., L39.

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  • First detection of VHE gamma-ray signal from the FSRQ TON 0599

    Lähteenmäki, A., Tornikoski, M. & MAGIC Collaboration, 1 Mar 2026, In: Monthly Notices of the Royal Astronomical Society. 546, 4, stag032.

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  • Infrared observations reveal the reprocessing envelope in the tidal disruption event AT 2019azh

    Reynolds, T. M., Thomsen, L., Mattila, S., Nagao, T., Anderson, J. P., Bauer, F. E., Charalampopoulos, P., Dai, L., Faris, S., Gromadzki, M., Gutiérrez, C. P., Kuncarayakti, H., Inserra, C., Kankare, E., Kravtsov, T., Moldon, J., Moran, S., Pérez Torres, M., Wiseman, P. & van Velzen, S., Apr 2026, In: Astronomy and Astrophysics. 708, 18 p., A139.

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  • Insights into jet–NLR energetics in PMN J0948+0022

    Dalla Barba, B., Foschini, L., Berton, M., Lähteenmäki, A., Tornikoski, M., Sani, E., Crepaldi, L., Congiu, E., Venturi, G., Hon, W. J. & Vietri, A., 2026, In: Contributions of the Astronomical Observatory Skalnate Pleso. 56, 1, p. 43-51 9 p.

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  • IXPE observations of the blazar Mrk 501 in 2022: a multiwavelength view

    Lisalda, L., Gau, E., Krawczynski, H., Tavecchio, F., Liodakis, I., Gokus, A., Rodriguez Cavero, N., Nowak, M., Negro, M., Middei, R., Perri, M., Puccetti, S., Jorstad, S. G., Agudo, I., Marscher, A. P., Agís-González, B., Berdyugin, A. V., Bernardos, M. I., Blinov, D. & Bonnoli, G. & 140 others, Borman, G. A., Bourbah, I. G., Casadio, C., Casanova, V., Castro-Tirado, A. J., Fernández-García, E., García-Comas, M., Grishina, T. S., Hakala, P., Hovatta, T., Hu, Y. D., Husillos, C., Escudero, J., Jormanainen, J., José Aceituno, F., Kagitani, M., Kiehlmann, S., Kontopodis, E., Kopatskaya, E. N., Kouch, P. M., Kravtsov, V., Lähteenmäki, A., Larionova, E. G., Lindfors, E., Mandarakas, N., Marchini, A., Masiero, J. R., Mawet, D., Max-Moerbeck, W., Morozova, D. A., Myserlis, I., Nilsson, K., Panopoulou, G. V., Pearson, T. J., Readhead, A. C. S., Reeves, R., Romanopoulos, S., Sakanoi, T., Salomé, Q., Savchenko, S. S., Skalidis, R., Sota, A., Syrjärinne, I., Tinyanont, S., Tornikoski, M., Troitskaya, Y. V., Troitskiy, I. S., Vasilyev, A. A., Vervelaki, A., Zhovtan, A. V., 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., Ciprini, S., Costa, E., De Rosa, A., Del Monte, E., Di Gesu, L., Di Lalla, N., Di Marco, A., Donnarumma, I., Doroshenko, V., Dovčiak, M., Ehlert, S. R., Enoto, T., Evangelista, Y., Fabiani, S., Ferrazzoli, R., Garcia, J. A., Gunji, S., Gurwell, M., Hayashida, K., Heyl, J., Iwakiri, W., Kaaret, P., Karas, V., Keating, G., Kislat, F., Kitaguchi, T., Kolodziejczak, J. J., La Monaca, F., Latronico, L., Maldera, S., Manfreda, A., Marin, F., Marinucci, A., Marshall, H. L., Massaro, F., Matt, G., Mitsuishi, I., Mizuno, T., Muleri, F., Ng, C., O’Dell, S. L., Omodei, N., Oppedisano, C., Papitto, A., Pavlov, G. G., Peirson, A. L., Pesce-Rollins, M., Petrucci, P., Pilia, M., Possenti, A., Poutanen, J., Ramsey, B. D., Rankin, J., Rao, R., Ratheesh, A., Roberts, O. J., Romani, R. W., 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., Jun 2026, In: Monthly Notices of the Royal Astronomical Society. 549, 1, staf1122.

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  • Massive stars exploding in a He-rich circumstellar medium: XII. SN 2024acyl: A fast, linearly declining Type Ibn supernova with early flash-ionisation features

    Cai, Y. Z., Pastorello, A., Maeda, K., Zhao, J. W., Wang, Z. Y., Peng, Z. H., Reguitti, A., Tartaglia, L., Filippenko, A. V., Pan, Y., Valerin, G., Kumar, B., Wang, Z., Fraser, M., Anderson, J. P., Benetti, S., Bose, S., Brink, T. G., Cappellaro, E. & Chen, T. W. & 46 others, Chen, X. L., Elias-Rosa, N., Esamdin, A., Gal-Yam, A., González-Bañuelos, M., Gromadzki, M., Gutiérrez, C. P., Inserra, C., Iskandar, A., Kangas, T., Kankare, E., Kravtsov, T., Kuncarayakti, H., Li, L. P., Liu, C. X., Liu, X. K., Lundqvist, P., Matilainen, K., Mattila, S., Moran, S., Müller-Bravo, T. E., Nagao, T., Petrushevska, T., Pignata, G., Salmaso, I., Smartt, S. J., Sollerman, J., Srivastav, S., Stritzinger, M. D., Wang, L. T., Yan, S. Y., Yang, Y., Yang, Y. P., Zheng, W., Zou, X. Z., Chen, L. Y., Du, X. L., Fang, Q. L., Fiore, A., Ragosta, F., Zha, S., Zhang, J. J., Liu, X. W., Bai, J. M., Wang, B. & Wang, X. F., 1 Mar 2026, In: Astronomy and Astrophysics. 707, A157.

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  • Peculiar SN Ic 2022esa : An explosion of a massive Wolf–Rayet star in a binary as a precursor to a BH–BH binary?

    Maeda, K., Kuncarayakti, H., Nagao, T., Kawabata, M., Taguchi, K., Uno, K. & De, K., 1 Feb 2026, In: Publications of the Astronomical Society of Japan. 78, 1, p. L1-L7

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  • Probing jet base emission of M87* with the 2021 Event Horizon Telescope observations

    Ramakrishnan, V., Savolainen, T., Wiik, K. & Event Horizon Telescope Collaboration, 1 Feb 2026, In: Astronomy and Astrophysics. 706, A27.

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  • SN 2023gpw: Exploring the diversity and power sources of hydrogen-rich superluminous supernovae

    Kangas, T., Charalampopoulos, P., Nagao, T., Yan, L., Stritzinger, M., Schulze, S., Das, K., Elias-Rosa, N., Fremling, C., Perley, D., Sollerman, J., Müller-Bravo, T. E., Galbany, L., Groom, S. L., Gutiérrez, C. P., Kasliwal, M. M., Kotak, R., Laher, R. R., Lundqvist, P. & Mattila, S. & 1 others, Smith, R., 6 Jan 2026, In: Astronomy and Astrophysics. 705, 28 p., A52.

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  • SN 2024cld: unveiling the complex mass-loss histories of evolved supergiant progenitors to core collapse supernovae

    Killestein, T. L., Pursiainen, M., Kotak, R., Charalampopoulos, P., Lyman, J., Ackley, K., Belkin, S., Coppejans, D. L., Davies, B., Dyer, M. J., Galbany, L., Godson, B., Jarvis, D., Koivisto, N., Kumar, A., Magee, M., Mitchell, M., O’Neill, D., Sahu, A. & Warwick, B. & 35 others, Breton, R. P., Butterley, T., 蔡永志, Casares, J., Dhillon, V. S., Elias-Rosa, N., Fraser, M., Galloway, D. K., Gompertz, B., González-Bañuelos, M., Gutiérrez, C. P., Kangas, T., Kankare, E., Kelsey, L., Kravtsov, T., Leloudas, G., Littlefair, S. P., Matilainen, K., Mattila, S., Nagao, T., Noysena, K., Nuttall, L. K., O’Brien, P., Pollacco, D., Ramsay, G., Reguitti, A., Reynolds, T. M., Salmaso, I., Starling, R. L. C., Steeghs, D., Stritzinger, M., Ulaczyk, K., Valerin, G., Wang, Z. & Wilson, R., May 2026, In: Monthly Notices of the Royal Astronomical Society. 548, 2

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  • Spatially resolved polarization swings in the supermassive binary black hole candidate OJ 287 with first Event Horizon Telescope observations

    Ramakrishnan, V., Savolainen, T., Wiik, K. & Event Horizon Telescope Collaboration, 1 Jan 2026, In: Astronomy and Astrophysics. 705, A23.

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  • The hydrogen-free circumstellar interaction in the Type Ib supernova 2021efd : A clue to the mechanism of the helium-layer stripping

    Pyykkinen, N., Nagao, T., Kuncarayakti, H., Stritzinger, M. D., Kangas, T., Maeda, K., Chen, P., Sollerman, J., Burns, C., Bose, S., Folatelli, G., Ferrari, L., Morrell, N., Reguitti, A., Salmaso, I., Mattila, S., Gal-Yam, A., Fremling, C., Anand, S. & Kasliwal, M. M. & 10 others, Gutierrez, C. P., Galbany, L., Hoogendam, W., Schulze, S., Ashall, C., Medler, K., Pfeffer, C. M., Lundqvist, P., Rusholme, B. & Adler, J., 10 Feb 2026, In: Astronomy & Astrophysics. 706, p. 1-16 16 p., A183.

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  • Tracking Down the Broadband Polarimetric Properties of PG 1553+113

    Middei, R., Jorstad, S. G., Marscher, A. P., Liodakis, I., Perri, M., Maselli, A., Ciprini, S., Nardini, E., Puccetti, S., Di Gesu, L., Agudo, I., Kim, D. E., Myserlis, I., Trindade Falcão, A., Król, D., Antonelli, L. A., Aniello, T., Kouch, P. M., Nilsson, K. & Lindfors, E. & 61 others, Pursimo, T., Aceituno, F. J., Casanova, V., Emery, G., Pedrosa, J. E., Otero-Santos, J., Sota, A., Piirola, V., 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., Benke, P., Debbrecht, L., Eich, J., Eppel, F., Gokus, A., Hämmerich, S., Hessdörfer, J., Kadler, M., Kirchner, D., Paraschos, G. F., Rösch, F., Schulga, W., Gurwell, M., Keating, G., Rao, R., Angelakis, E., Kraus, A., Agís-González, B., Blinov, D., Glykopoulou, A., Capecchiacci, S., Floris, A., Fotis, P., Koukoutsi, A., Kypriotakis, J. A., Langis, D. A., Rompogiannakis, D., Polychronakis, A., Tsioupli, V., Vogiatzis, S., Zoumpoulakis, O., Tochihara, S., Imazawa, R., Sasada, M., Fukazawa, Y., Kawabata, K. S., Uemura, M., Mizuno, T., Nakaoka, T., Akitaya, H. & Akai, T., 10 Jun 2026, In: Astrophysical Journal. 1004, 1, 130.

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  • 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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  • A comprehensive radio study of narrow-line Seyfert 1 galaxies

    Varglund, I., Järvelä, E., Hardcastle, M. J., Varglund, S. & Lähteenmäki, A., 1 Nov 2025, In: Astronomy & Astrophysics. 703, A202.

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  • Active galactic nucleus time-variability analysis and its caveats

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

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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 & Astrophysics. 695, 21 p., A233.

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  • A real-time search for Type Ia Supernovae with late-time interactions with circumstellar material in ZTF data

    Terwel, J. H., Maguire, K., Brennan, S. J., Galbany, L., Reusch, S., Schulze, S., Koivisto, N., Pursimo, T., Grund Sørensen, S., Díaz Teodori, M. A., Guldberg Theil, A., Turkki, M., Müller-Bravo, T. E., Burgaz, U., Kim, Y. L., Bloom, J. S., Graham, M. J., Kasliwal, M. M., Kulkarni, S. R. & Masci, F. J. & 3 others, Purdum, J., Pyshna, O. & Wold, A., 1 Oct 2025, In: Astronomy & Astrophysics. 702, 17 p., A21.

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  • A Two-week IXPE Monitoring Campaign on Mrk 421

    Maksym, W. P., Liodakis, I., Saade, M. L., Kim, D. E., Middei, R., Di Gesu, L., Kiehlmann, S., Matzeu, G., Agudo, I., Marscher, A. P., Ehlert, S. R., Jorstad, S. G., Kaaret, P., Marshall, H. L., Pacciani, L., Perri, M., Puccetti, S., Kouch, P. M., Lindfors, E. & Aceituno, F. J. & 137 others, Bonnoli, G., Casanova, V., Escudero, J., Gómez, J. L., Agís-González, B., Husillos, C., Morcuende, D., Santos, J. O., Sota, A., Piirola, V., Imazawa, R., Sasada, M., Fukazawa, Y., Kawabata, K. S., Uemura, M., Mizuno, T., Nakaoka, T., Akitaya, H., 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., Pauley, C., Angelakis, E., Kraus, A., Berdyugin, A. V., Kagitani, M., Kravtsov, V., Poutanen, J., Sakanoi, T., Kang, S., Lee, S. S., Kim, S. H., Cheong, W. Y., Jeong, H. W., Song, C., Blinov, D., Shablovinskaya, E., 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., 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., 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., 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 Jun 2025, In: Astrophysical Journal. 986, 2, 20 p., 230.

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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 & Astrophysics. 694, 20 p., A195.

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  • Detection of Compton Scattering in the Jet of 3C 84

    Liodakis, I., Chakraborty, S., Marin, F., Ehlert, S. R., Barnouin, T., Kouch, P. M., Nilsson, K., Lindfors, E., Pursimo, T., Paraschos, G. F., Middei, R., Falcão, A. T., Jorstad, S., Agudo, I., Kovalev, Y. Y., Casey, J. J., Gesu, L. D., Kaaret, P., Kim, D. E. & Kislat, F. & 60 others, Ratheesh, A., Saade, M. L., Tombesi, F., Marscher, A., Aceituno, F. J., Bonnoli, G., Casanova, V., Emery, G., Pedrosa, J. E., Morcuende, D., Otero-Santos, J., Sota, A., Piirola, V., Bachev, R., Strigachev, 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., Song, C., Li, S., Nam, M. S., Álvarez-Ortega, D., Casadio, C., Angelakis, E., Kraus, A., Jormanainen, J., Ramazani, V. F., Chen, C. T., Costa, E., Churazov, E., Ferrazzoli, R., Galanti, G., Khabibullin, I., O’Dell, S. L., Pacciani, L., Roncadelli, M., Roberts, O. J., Soffitta, P., Swartz, D. A., Tavecchio, F., Weisskopf, M. C. & Zhuravleva, I., 20 Nov 2025, In: Astrophysical Journal Letters. 994, 1, p. 1-15 15 p., L9.

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  • Determining the origin of the X-ray emission in blazars through multiwavelength polarization

    Liodakis, I., Zhang, H., Boula, S., Middei, R., Otero-Santos, J., Blinov, D., Agudo, I., Böttcher, M., Chen, C. T., Ehlert, S. R., Jorstad, S. G., Kaaret, P., Krawczynski, H., Peirson, A. L., Romani, R. W., Tavecchio, F., Weisskopf, M. C., Kouch, P. M., Lindfors, E. & Nilsson, K. & 31 others, McCall, C., Jermak, H. E., Steele, I. A., Myserlis, I., Gurwell, M., Keating, G. K., Rao, R., Kang, S., Lee, S. S., Kim, S., Cheong, W. Y., Jeong, H. W., Angelakis, E., Kraus, A., Aceituno, F. J., Bonnoli, G., Casanova, V., Escudero, J., Agís-González, B., Morcuende, D., Sota, A., Bachev, R., Grishina, T. S., Kopatskaya, E. N., Larionova, E. G., Morozova, D. A., Savchenko, S. S., Shishkina, E. V., Troitskiy, I. S., Troitskaya, Y. V. & Vasilyev, A. A., 1 Jun 2025, In: Astronomy & Astrophysics. 698, L19.

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  • First polarization study of the M87 jet and active galactic nuclei at submillimeter wavelengths with ALMA

    Ramakrishnan, V., Savolainen, T., Wiik, K. & Event Horizon Telescope Collaboration, 1 Jul 2025, In: Astronomy & Astrophysics. 699, A265.

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  • Galactic transient sources with the Cherenkov Telescope Array Observatory

    Abe, K., Abe, S., Abhir, J., Abhishek, A., Acero, F., Acharyya, A., Adam, R., Aguasca-Cabot, A., Agudo, I., Aguirre-Santaella, A., Alfaro, J., Alfaro, R., Alvarez-Crespo, N., Alves Batista, R., Amans, J.-P., Amato, E., Ambrosi, G., Ambrosino, F., Anguner, E. O. & Antonelli, L. A. & 31 others, Aramo, C., Arcaro, C., Arnesen, T. T. H., Asano, K., Ascasibar, Y., Aschersleben, J., Ashkar, H., Augusto Stuani, L., Baack, D., Backes, M., Balazs, C., Balbo, M., Baquero Larriva, A., Barbosa Martins, V., Chen, A. W., Dai, S., Gonzalez, M. M., Hovatta, T., Jin, W., Lindfors, E., Martinez, G. A., Miranda, J. M., Nayak, A., Rocha, L. S., Romeo, G., Sarkar, A., Tian, W. W., Will, M., Yang, L., Zhang, W. & Cherenkov Telescope Array Observatory Consortium, Jun 2025, In: Monthly Notices of the Royal Astronomical Society. 540, 1, p. 205-238 34 p.

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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 & Astrophysics. 694, A291.

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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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  • Horizon-scale variability of M87* from 2017–2021 EHT observations

    Ramakrishnan, V., Savolainen, T., Wiik, K. & Event Horizon Telescope Collaboration, 1 Dec 2025, In: Astronomy & Astrophysics. 704, A91.

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  • Instrumental and systematic effects in VGOS differential ionospheric total electron content

    Zubko, N., Xu, M. H., Kareinen, N., Savolainen, T. & Poutanen, M., 1 Oct 2025, In: Advances in Space Research. 76, 7, p. 3914-3930 17 p.

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  • Keplerian molecular gas disk and black hole mass of NGC 4751

    Osorno, J., Nagar, N., Richtler, T., Ramakrishnan, V., Finlez, C., Messias, H., Gültekin, K., Gebhardt, K. & Teuben, P., 1 Mar 2025, In: Astronomy & Astrophysics. 695, 15 p., A72.

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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 & Astrophysics. 693, 22 p., A318.

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  • Looking into the jet cone of the neutrino-associated very high-energy blazar PKS 1424+240

    Kovalev, Y. Y., Pushkarev, A. B., Gómez, J. L., Homan, D. C., Lister, M. L., Livingston, J. D., Pashchenko, I. N., Plavin, A. V., Savolainen, T. & Troitsky, S. V., 1 Aug 2025, In: Astronomy & Astrophysics. 700, L12.

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  • Modeling the Multiwavelength Emission of 3C 279 during the 14 yr Fermi-LAT Era

    Mohana A, K., Gupta, A. C., Fan, J., Sahakyan, N., Raiteri, C. M., Cui, L., Lähteenmäki, A., Gurwell, M., Tornikoski, M. & Villata, M., 10 Aug 2025, In: Astrophysical Journal. 989, 1, 125.

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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.

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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.

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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.

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  • Observational diversity of bright long-lived Type II supernovae

    Nagao, T., Reynolds, T. M., Kuncarayakti, H., Cartier, R., Mattila, S., Maeda, K., Sollerman, J., Pessi, P. J., Anderson, J. P., Inserra, C., Chen, T. W., Ferrari, L., Fraser, M., Young, D. R., Gromadzki, M., Gutiérrez, C. P., Lundqvist, P., Pignata, G., Müller-Bravo, T. E. & Ragosta, F. & 5 others, Reguitti, A., Moran, S., González-Bañuelos, M., Kopsacheili, M. & Petrushevska, T., 1 Jul 2025, In: Astronomy & Astrophysics. 699, A283.

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  • Optical evolution of AT 2024wpp: the high-velocity outflows in Cow-like transients are consistent with high spherical symmetry

    Pursiainen, M., Killestein, T. L., Kuncarayakti, H., Charalampopoulos, P., Warwick, B., Lyman, J., Kotak, R., Leloudas, G., Coppejans, D., Kravtsov, T., Maeda, K., Nagao, T., Taguchi, K., Ackley, K., Dhillon, V. S., Galloway, D. K., Kumar, A., O’Neill, D., Ramsay, G. & Steeghs, D., 1 Mar 2025, In: Monthly Notices of the Royal Astronomical Society. 537, 4, p. 3298-3309 12 p.

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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., 1 Apr 2025, In: Astronomy & Astrophysics. 696, p. 1-22 22 p., A73.

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  • Origin of the ring ellipticity in the black hole images of M87

    Wiik, K., Ramakrishnan, V., Savolainen, T., Event Horizon Telescope Collaboration & Freeman, W. T., 1 Jul 2025, In: Astronomy & Astrophysics. 699, A279.

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  • Pinpointing the location of the γ -ray emitting region in the FSRQ 4C +01.28

    Rösch, F., Kadler, M., Ros, E., Ricci, L., Gurwell, M. A., Hovatta, T., Macdonald, N. R. & Readhead, A. C. S., 1 Dec 2025, In: Astronomy & Astrophysics. 704, A143.

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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.

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  • PKS J0805-0111: A Second Owens Valley Radio Observatory Blazar Showing Highly Significant Sinusoidal Radio Variability—The Tip of the Iceberg

    de la Parra, P. V., Kiehlmann, S., Mróz, P., Readhead, A. C. S., Synani, A., Begelman, M. C., Blandford, R. D., Ding, Y., Harrison, F., Liodakis, I., Max-Moerbeck, W., Pavlidou, V., Reeves, R., Vallisneri, M., Aller, M. F., Graham, M. J., Hovatta, T., Lawrence, C. R., Lazio, T. J. W. & Mahabal, A. A. & 6 others, Molina, B., O’Neill, S., Pearson, T. J., Ravi, V., Tassis, K. & Zensus, J. A., 10 Jul 2025, In: Astrophysical Journal. 987, 2, 191.

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  • Revisiting 3C 279 jet morphology with space VLBI at 26 microarcsecond resolution

    Toscano, T., Gómez, J. L., Zhao, G. Y., Lico, R., Fuentes, A., Savolainen, T., Röder, J., Wielgus, M., Pushkarev, A. B., Traianou, E., Zeng, A. L., Gurvits, L. I., Kovalev, Y. Y., Pötzl, F. M. & Lisakov, M., 1 Dec 2025, In: Astronomy & Astrophysics. 704, 12 p., A225.

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  • Shared-optical-path VLBI frequency phase transfer from 86 to 258 GHz on an 8600km baseline: Demonstrated with the APEX and IRAM 30m telescopes

    Zhao, G. Y., Roy, A. L., Wagner, J. F., Donoso, E., Torne, P., Ros, E., Lindqvist, M., Lobanov, A. P., Ramakrishnan, V., Krichbaum, T. P., Rottmann, H., Zensus, J. A., Pérez-Beaupuits, J. P., Klein, B., Menten, K. M., Ricken, O., Reyes, N., Sánchez, S., Ruiz, I. & Durán, C. & 8 others, John, D., Santaren, J. L., Sánchez-Portal, M., Bremer, M., Kramer, C., Schuster, K. F., Rioja, M. J. & Dodson, R., 1 Sept 2025, In: Astronomy & Astrophysics. 701, A132.

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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.

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  • Spectropolarimetry of a Nuclear Transient AT2023clx: Revealing the Geometrical Alignment between the Transient Outflow and the Nuclear Dusty Region

    Uno, K., Maeda, K., Nagao, T., Leloudas, G., Charalampopoulos, P., Mattila, S., Aoki, K., Taguchi, K., Kawabata, M., Moldon, J., Pérez-Torres, M., Pursiainen, M. & Reynolds, T., 20 Jun 2025, In: Astrophysical Journal Letters. 986, 2, L23.

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  • Spectropolarimetry of NGC 1275 reveals a narrow-line radio galaxy with polarization parallel to its radio jet axis

    Marin, F., Pursimo, T., Liodakis, I., Lindfors, E., Biedermann, J., Hutsemékers, D. & Turkki, M., 1 Oct 2025, In: Astronomy & Astrophysics. 702, L16.

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