Seppo Mattila
 

Department of Physics and Astronomy

sepmat@utu.fi

+358 29 450 4518

+358 50 412 5859

Vesilinnantie 5

Turku


: https://orcid.org/0000-0001-7497-2994

I received my PhD degree from Imperial College, Univ. of London in 2002. After this I held postdoctoral positions at Stockholm University, Helsinki University of Technology (now Aalto University) and Queen's University Belfast. I moved back to Finland in 2007 with an Academy of Finland Research Fellowship to work at Tuorla Observatory at University of Turku. Between 2012 and 2015 I worked at the Finnish Centre for Astronomy with ESO (FINCA) as a University Researcher. I was appointed as a Professor of Astronomy at the Department of Physics and Astronomy at University of Turku in 2015. After 2010 I have made extended research visits to Stockholm University (18 months) and to University of Cambridge, UK (10 months). I have been the Finnish delegate in the European Southern Observatory (ESO) Council since 2020 and in the International Scientific Committee (CCI) of the Roque de los Muchachos and Teide observatories since 2019. Since 2022 I have also served as the President of the CCI. I am currently also the President of the Finnish National Committee for Astronomy and a member of the Nordic Optical Telescope (NOT) Council and the board of FINCA, and a vice member of the board of the Univ. of Turku Faculty of Science. In 2022 I was invited as a member of the Finnish Academy of Science and Letters.



​​​​​​My main research interests focus on observational work on extragalactic astrophysical transients, including supernovae, tidal disruption events, and kilonovae. For more details on my research and information on the research group please see https://sites.utu.fi/sne/. For a complete list of my refereed journal papers see ADS (in chronological order) or ADS (ordered by number of citations).

Selected recent papers:

Reynolds, Thomsen, Mattila et al. 2025, A&A: Infrared observations reveal the reprocessing envelope in the tidal disruption event AT 2019azh

Matilainen, Kankare, Mattila et al. 2025, A&A: Long-term evolution of the SN 2009ip-like transient SN 2016cvk

Mäntynen, Kankare, Mattila et al. 2025, A&A: The undetectable fraction of core-collapse supernovae in luminous infrared galaxies

Gutiérrez, Mattila et al. 2024, ApJ: CSS 161010: A Luminous Fast Blue Optical Transient with Broad Blueshifted Hydrogen Lines

Nagao, Maeda, Mattila et al. 2024, A&A: Evidence for bipolar explosions in Type IIP supernovae

Kool et al. (incl. Mattila) 2023, Nature: A radio-detected type Ia supernova with helium-rich circumstellar material

Pasham et al. (incl. Mattila) 2023, Nature Astronomy: The Birth of a Relativistic Jet Following the Disruption of a Star by a Cosmological Black Hole

Reynolds, Mattila et al. 2022, A&A: Energetic nuclear transients in luminous and ultraluminous infrared galaxies

Perez-Torres, Mattila et al. 2021, The Astronomy and Astrophysics Review: Star formation and nuclear activity in luminous infrared galaxies: An infrared through radio review

Kool, Reynolds, Mattila et al. 2020, MNRAS: AT2017gbl: a dust obscured TDE candidate in a luminous infrared galaxy

Ackley et al. (incl. Mattila) 2020, A&A: Observational constraints on the optical and near-infrared emission from the neutron star-black hole binary merger S190814bv

Reynolds, Fraser, Mattila et al. 2020, MNRAS: SN 2016gsd: An unusually luminous and linear type II supernova with high velocities

Mattila et al. 2018, Science: A dust-enshrouded tidal disruption event with a resolved radio jet in a galaxy merger​

Smartt et al. (incl. Mattila) 2017, Nature: A kilonova as the electromagnetic counterpart to a gravitational-wave source​

Abbott et al. (imcl. Mattila) 2017, ApJ: Multi-messenger Observations of a Binary Neutron Star Merger

Kankare, Kotak, Mattila et al. 2017, Nature Astronomy: A population of highly energetic transient events in the centres of active galaxies



I have taught several courses in astronomy, astrophysics and signal and image processing at the Univ. of Turku. In  particular, I initiated two new observational astronomy courses currently offered at national level for students from Turku, Helsinki, Oulu and the Aalto University. These courses offer hands-on experience on the use of the Nordic Optical Telescope (NOT) remotely from Univ. of Turku (Observational Techniques Using the Nordic Optical Telescope) and on the science exploitation of data from the European Southern Observatory (ESO; Data Processing Techniques for Astronomy with ESO Instrumentation). Currently I teach also the BSc course on observational astronomy and the MSc courses Spectroscopic Diagnostics in Astrophysics and Signal and Image Processing. In my teaching I always try to make use of examples from the latest research in order to offer a motivating learning experience for the students.



  
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  • Euclid: Searching for pair-instability supernovae with the Deep Survey  (2022)  
    • Astronomy and Astrophysics
     Moriya T. J., Inserra C., Tanaka M., Cappellaro E., Della Valle M., Hook I., Kotak R., Longo G., Mannucci F., Mattila S., Tao C., Altieri B., Amara A., Auricchio N., Bonino D., Branchini E., Brescia M., Brinchmann J., Camera S., Capobianco V., Carbone C., Carretero J., Castellano M., Cavuoti S., Cimatti A., Cledassou R., Congedo G., Conselice C. J., Conversi L., Copin Y., Corcione L., Courbin F., Cropper M., Da Silva A., Degaudenzi H., Douspis M., Dubath F., Duncan C. A. J., Dupac X., Dusini S., Ealet A., Farrens S., Ferriol S., Frailis M., Franceschi E., Fumana M., Garilli B., Gillard W., Gillis B., Giocoli C., Grazian A., Grupp F., Haugan S. V. H., Holmes W., Hormuth F., Hornstrup A., Jahnke K., Kermiche S., Kiessling A., Kilbinger M., Kitching T., Kurki-Suonio H., Ligori S., Lilje P. B., Lloro I., Maiorano E., Mansutti O., Marggraf O., Markovic K., Marulli F., Massey R., McCracken H. J., Melchior M., Meneghetti M., Meylan G., Moresco M., Moscardini L., Munari E., Niemi S. M., Padilla C., Paltani S., Pasian F., Pedersen K., Pettorino V., Poncet M., Popa L., Raison F., Rhodes J., Riccio G., Rossetti E., Saglia R., Sartoris B., Schneider P., Secroun A., Seidel G., Sirignano C., Sirri G., Stanco L., Tallada-Crespí P., Taylor A. N., Tereno I., Toledo-Moreo R., Torradeflot F., Wang Y., Zamorani G., Zoubian J., Andreon S., Scottez V., Morris P. W.


  •   (2022)  
    • Proceedings of SPIE : the International Society for Optical EngineeringProceedings of SPIE : the International Society for Optical Engineering
    Proceedings of SPIE: Ground-based and Airborne Instrumentation for Astronomy IX Santhakumari KKR, Battaini F, Claudi R, Slemer A, Biondi F, Munari M, Sanchez RZ, Aliverti M, Oggioni L, Colapietro M, Ricci D, Lessio L, Dima M, Marafatto L, Farinato J, Campana S, Schipani P, D'Orsi S, Salasnich B, Baruffolo A, Ben-Amif S, Capasso G, Cosentino R, D'Alessio F, D'Avanzo P, Hershko O, Kuncarayakti H, Landoni M, Pignata G, Rubin A, Scuderi S, Vitali F, Young D, Achren J, Araiza-Duran JA, Arcavi I, Brucalassi A, Bruch R, Cappellaro E, Della Valle M, Di Benedetto R, Gal-Yam A, Genoni M, Hernandez M, Kotilainen J, Causi GL, Marty L, Mattila S, Rappaport M, Riva M, Smartt S, Stritzingerv M, Venturae H


  • Late-time H/He-poor Circumstellar Interaction in the Type Ic Supernova SN 2021ocs: An Exposed Oxygen-Magnesium Layer and Extreme Stripping of the Progenitor  (2022)  
    • Astrophysical Journal LettersProceedings of SPIE : the International Society for Optical Engineering
     Kuncarayakti H., Maeda K., Dessart L., Nagao T, Fulton M, Gutiérrez C, Huber M.E., Young D.R., Kotak R, Mattila S., Anderson J.P., Ferrari L., Folatelli G., Gao H., Magnier E., Smith K.W., Srivastav S.


  • Progress on the simulation tools for the SOXS spectrograph: Exposure time calculator and End-to-End simulatorSN 2020wnt: a slow-evolving carbon-rich superluminous supernova with no O II lines and a bumpy light curve  (2022)  
    • Proceedings of SPIE : the International Society for Optical EngineeringMonthly Notices of the Royal Astronomical Society
    Proceedings of SPIE: Modeling, Systems Engineering, and Project Management for Astronomy X Genoni M, Scaudo A, Li Causi G, Cabona L, Landoni M, Campana S, Schipani P, Claudi R, Aliverti M, Baruffolo A, Ben-Ami S, Biondi F, Capasso G, Cosentino R, D'Alessio F, D'Avanzoa P, Hershko O, Kuncarayakti H, Munari M, Pignata G, Rubin A, Scuderi S, Vitali F, Young D, Achren J, Araiza-Duran JA, Arcavir I, Battaini F, Brucalassi A, Bruche R, Cappellaro E, Colapietro M, Della Valle M, De Pascale M, Di Benedetto R, D'Orsi S, Gal-Yam A, Hernandez M, Kotilainen J, Marty L, Mattila S, Rappaport M, Ricci D, Riva M, Salasnich B, Smartt S, Sanchez RZ, Stritzinger M, Ventura H


  •   (2022)  
      Proceedings of SPIE: Ground-based and Airborne Instrumentation for Astronomy IX Vitali Fabrizio, Aliverti Matteo, D'Alessio Francesco, Genoni Matteo, Scuderi Salvatore, Munari Matteo, Oggioni Luca, Scaudo Andrea, Pariani Giorgio, Bellassai Giancarlo, Di Benedetto Rosario, Martinetti Eugenio, Miccichè Antonio, Nicotra Gaetano, Occhipinti Giovanni, Campana Sergio, Schipani Pietro, Claudi Riccardo, Capasso Giulio, Ricci Davide, Riva Marco, Sanchez R. Z., Araiza-Durán José Antonio, Arcavi Iair, Baruffolo Andrea, Battaini Federico, Ben-Ami Sagi, Brucalassi Anna, Bruch Rachel, Cappellaro Enrico, Colapietro Mirko, Cosentino Rosario, D'Avanzo Paolo, D'Orsi Sergio, Della Valle Massimo, Gal-Yam Avishay, Díaz Marcos Hernandez, Hershko Ofir, Kotilainen Jari, Kuncarayakti Hanindyo, Landoni Marco, Li Causi Gianluca, Marty Laurent, Mattila Seppo, Ventura Hector Pérez, Pignata Giuliano, Radhakrishnan Kalyan, Rappaport Michael, Rubin Adam, Salasnich Bernardo, Smartt Stephen, Stritzinger Maximilian, Young David


    • Progress on the SOXS transients chaser for the ESO-NTT  (2022)  
        Proceedings of SPIE: Ground-based and Airborne Instrumentation for Astronomy IX Schipani P, Campana S, Claudi R, Aliverti M, Baruffolo A, Ben-Ami S, Capasso G, Cosentino R, D'Alessio F, D'Avanzo P, Hershko O, Kuncarayakti H, Landoni M, Munari M, Pignata G, Radhakrishnan K, Rubino A, Scuderi S, Vitali F, Young D, Achren J, Araiza-Duran JA, Arcavi I, Battaini F, Brucalassi A, Bruch R, Cappellaro E, Colapietro M, Della Valle M, Di Benedetto R, D'Orsi S, Gal-Yam A, Genoni M, Hernandez M, Kotilainen J, Causi GL, Lessio L, Marty L, Mattila S, Rappaport M, Ricci D, Riva M, Salasnich B, Savarese S, Smartt S, Sanchez RZ, Stritzinger M, Umbriaco G, Ventura H, Pasquini L, Scholler M, Kaufl HU, Accardo M, Mehrgan L, Pompei E, Saviane I


      •   (2022)  
           Gutierrez CP, Pastorello A, Bersten M, Benetti S, Orellana M, Fiore A, Karamehmetoglu E, Kravtsov T, Reguitti A, Reynolds TM, Valerin G, Mazzali P, Sullivan M, Cai YZ, Elias-Rosa N, Fraser M, Hsiao EY, Kankare E, Kotak R, Kuncarayakti H, Li Z, Mattila S, Mo J, Moran S, Ochner P, Shahbandeh M, Tomasella L, Wang X, Yan S, Zhang J, Zhang T, Stritzinger MD


        • Spectroscopic classification of SN 2022gnp by NUTS2 (NOT Un-biased Transient Survey-2) #15320  (2022)  
          • Proceedings of SPIE : the International Society for Optical Engineering
          Proceedings of SPIE: Ground-based and Airborne Instrumentation for Astronomy IX Claudi Riccardo, Radhakrishnan Kalyan, Battaini Federico, Campana Sergio, Schipani Pietro, Aliverti Matteo, Araiza-Durán José Antonio, Baruffolo Andrea, Ben-Ami Sagi, Brucalassi Anna, Capasso Giulio, Colapietro Mirko, Cosentino Rosario, D'Alessio Francesco, D'Avanzo Paolo, Benedetto Rosario Di, D'Orsi Sergio, Genoni Matteo, Hershko Ofir, Kuncarayakti Hanindyo, Landoni Marco, Munari Matteo, Pignata Giuliano, Rappaport Michael, Ricci Davide, Rubin Adam, Scuderi Salvatore, Smartt Stephen, Vitali Fabrizio, Young David, Sanchez Ricardo Zanmar, Achrén Jani, Arcavi Iair, Bruch Rachel, Cappellaro Enrico, Della Valle Massimo, Gal-Yam Avishay, Li Causi Gianluca, Marafatto Luca, Mattila Seppo, Riva Marco, Salasnich Bernardo, Stritzinger Maximilian


        • SOXS mechanical integration and verification in ItalyThe First Data Release of CNIa0.02-A Complete Nearby (Redshift <0.02) Sample of Type Ia Supernova Light Curves*  (2022)  
          • Proceedings of SPIE : the International Society for Optical EngineeringProceedings of SPIE : the International Society for Optical Engineering
          Proceedings of SPIE: Ground-based and Airborne Instrumentation for Astronomy IX Aliverti M, Battaini F, Radhakrishnan K, Genoni M, Pariani G, Oggioni L, Hershko O, Colapietro M, D'Orsi S, Brucalassi A, Pignata G, Kuncarayakti H, Campana S, Claudi R, Schipani P, Achren J, Duran JAA, Arcavi I, Baruffolo A, Ben Ami S, Bruch R, Capasso G, Cappellaro E, Cosentino R, D'Alessio F, D'Avanzo P, Della Valle M, De Pascale M, Di Benedetto R, Yam AG, Hernandez M, Kotilainen J, Landoni M, Li Causi G, Mattila S, Munari M, Rappaport M, Redaelli KEMA, Ricci D, Riva M, Rubin A, Salasnich B, Smartt S, Sanchez RZ, Scuderi S, Stritzinger M, Ventura E, Vitali F, Young D


        •   (2022)  Astronomer's Telegram Williams S, Kankare E, Mattila S, Matilainen K, Reynolds T; on behalf of the NUTS2 collaboration


        •   (2022)  
            Proceedings of SPIE: Adaptive Optics Systems VIII Grazian Andrea, Simioni Matteo, Arcidiacono Carmelo, Achren Jani, Clenet Yann, Cao Yixian, Davies Richard, Gullieuszik Marco, Helin Tapio, Jodlbauer Daniel, Kuncarayakti Hanindyo, Le Louarn Miska, Mattila Seppo, Pedichini Fernando, Piazzesi Roberto, Portaluri Elisa, Kleijn Gijs Verdoes, Vulcani Benedetta, Wagner Roland, Williams Steven, Zanella Anita, Zeilinger Werner W.


          •   (2022)  
            • Astrophysical Journal Supplement
             Chen Ping, Dong Subo, Kochanek CS, Stanek KZ, Post RS, Stritzinger MD, Prieto JL, Filippenko Alexei V, Kollmeier Juna A, Elias-Rosa N, Katz Boaz, Tomasella Lina, Bose S, Ashall Chris, Benetti S, Bersier D, Brimacombe Joseph, Brink Thomas G, Brown P, Buckley David AH, Cappellaro Enrico, Christie Grant W, Fraser Morgan, Gromadzki Mariusz, Holoien Thomas WS, Hu Shaoming, Kankare Erkki, Koff Robert, Lundqvist P, Mattila S, Milne PA, Morrell Nidia, Munoz JA, Mutel Robert, Natusch Tim, Nicolas Joel, Pastorello A, Prentice Simon, Roth Tyler, Shappee BJ, Stone Geoffrey, Thompson Todd A, Villanueva Steven, Zheng WeiKang

          • The Gravitational-wave Optical Transient Observer (GOTO): Prototype performance and prospects for transient scienceThe Quality Check system architecture for Son-Of-X-Shooter SOXS  (2022)  
            • Monthly Notices of the Royal Astronomical Society
             Steeghs D., Galloway D.K., Ackley K., Dyer M.J., Lyman J., Ulaczyk K., Cutter R., Mong Y.L., Dhillon V., O'Brien P., Ramsay G., Poshyachinda S., Kotak Rubina., Nuttall L.K., Pallé E., Breton R.P., Pollacco D., Thrane E., Aukkaravittayapun S., Awiphan S., Burhanudin U., Chote P., Chrimes A., Daw E., Duffy C., Eyles-Ferris R., Gompertz B., Heikkilä Teppo, Irawati P., Kennedy M.R., Killestein T., Kuncarayakti Hanindyo, Levan A.J., Littlefair S., Makrygianni L., Marsh T., Mata-Sanchez D., Mattila Seppo, Maund J., McCormac J., Mkrtichian D., Mullaney J., Noysena K., Patel M., Rol E., Sawangwit U., Stanway E.R., Starling R., Strøm P., Tooke S., West R., White D.J., Wiersema K.


          • The integration and alignment phase for the Acquisition and Guiding System of SOXS2022)  
            • Proceedings of SPIE : the International Society for Optical EngineeringProceedings of SPIE : the International Society for Optical Engineering
            Proceedings of SPIE: Ground-based and Airborne Instrumentation for Astronomy IX Araiza-Durán José A., Pignata Giuliano, Brucalassi Anna, Battaini Federico, Radhakrishnan Kalyan, Claudi Riccardo, Campana Sergio, Schipani Pietro, Aliverti Matteo, Baruffolo Andrea, Ben-Ami Sagi, Capasso Giulio, Cosentino Rosario, D'Alessio Francesco, D'Avanzo Paolo, Hershko Ofir, Kuncarayakti Hanindyo, Landoni Marco, Munari Matteo, Rubin Adam, Scuderi Salvatore, Vitali Fabrizio, Young David, Achrén Jani, Arcavi Iair, Bruch Rachel, Cappellaro Enrico, Colapietro Mirko, Della Valle Massimo, Di Benedetto Rosario, D'Orsi Sergio, Gal-Yam Avishay, Genoni Matteo, Díaz Marcos Hernandez, Kotilainen Jari, Li Causi Gianluca, Marty Laurent, Mattila Seppo, Rappaport Michael, Ricci Davide, Riva Marco, Salasnich Bernardo, Smartt Stephen, Sanchez Ricardo Zanmar, Stritzinger Maximilian, Ventura Hector Pérez


          • The internal alignment and validation of a powered ADC for SOXS2022
            • Proceedings of SPIE : the International Society for Optical EngineeringProceedings of SPIE : the International Society for Optical Engineering
            Proceedings of SPIE: Ground-based and Airborne Instrumentation for Astronomy IX Battainia F, Radhakrishnana K, Claudi R, Munari M, Sanchez RZ, Aliverti M, Colapietro M, Ricci D, Lessio L, Dima M, Biondi F, Campana S, Schipani P, Baruffolo A, Ben-Ami S, Capasso G, Cosentino R, D'Alessio F, D'Avanzo P, Hershkod O, Kuncarayakti H, Landoni M, Pignata G, Rubin A, Scuderi S, Vitali F, Young D, Achren J, Araiza-Duran JA, Arcavi I, Brucalassi A, Bruch R, Cappellaro E, Della Valle M, De Pascale M, Di Benedetto R, D'Orsi S, Gal-Yam A, Genoni M, Hernandez M, Kotilainen J, Causi GL, Marty L, Mattila S, Rappaportd M, Riva M, Salasnich B, Smartt S, Stritzingerv M, Venturae H


          •   (2022)  
            • Monthly Notices of the Royal Astronomical Society
             Kangas T., Fransson C., Larsson J., France K., Chevalier R. A., Kirshner R. P., Lundqvist P., Mattila S., Sollerman J., Utrobin V. P.


          • The nuclear transient AT 2017gge: a tidal disruption event in a dusty and gas-rich environment and the awakening of a dormant SMBHThe SUNBIRD survey: the K-band luminosity functions of young massive clusters in intensely star-forming galaxies  (2022)  
            • Monthly Notices of the Royal Astronomical SocietyMonthly Notices of the Royal Astronomical Society
             Onori F, Cannizzaro G, Jonker PG, Kim M, Nicholl M, Mattila S, Reynolds TM, Fraser M, Wevers T, Brocato E, Anderson JP, Carini R, Charalampopoulos P, Clark P, Gromadzki M, Gutierrez CP, Ihanec N, Inserra C, Lawrence A, Leloudas G, Lundqvist P, Muller-Bravo TE, Piranomonte S, Pursiainen M, Rybicki KA, Somero A, Young DR, Chambers KC, Gao H, de Boer TJL, Magnier EA


          •   (2022)  
              Proceedings of SPIE: Software and Cyberinfrastructure for Astronomy VII Landoni Marco, Marty Laurent, Young Dave, Asquini Laura, Smartt Stephen J., Campana Sergio, Claudi Riccardo, Schipani Pietro, Aliverti Matteo, Battaini Federico, Baruffolo Andrea, Ben-Ami Sagi, Biondi Federico, Bianco Andrea, Capasso Giulio, Cosentino Rosario, D'Alessio Francesco, D'Avanzo Paolo, Genoni Matteo, Hershko Ofir, Kuncarayakti Hanindyo, Munari Matteo, Pignata Giuliano, Rubin Adam, Scuderi Salvatore, Vitali Fabrizio, Achrén Jani, Araiza-Duran
              José Antonio, Arcavi Iair, Brucalassi Anna, Bruch Rachel, Cappellaro Enrico, Colapietro Mirko, Della Valle Massimo, De Pascale Marco, Di Benedetto Rosario, D'Orsi Sergio, Gal-Yam Avishay, Hernandez-Diaz Marcos, Kotilainen Jari, Li Causi Gianluca, Mattila Seppo, Oggioni Luca, Pariani Giorgio, Rappaport Michael, Radhakrishnan Kalyan, Ricci Davide, Riva Marco, Salsanich Bernardo, Sanchez Ricardo Zanmar, Stritzinger Maximilian, Ventura Hector


            • The Son-Of-X-shooter (SOXS) Data-Reduction Pipeline2022
                Proceedings of SPIE: Software and Cyberinfrastructure for Astronomy VII Young David R., Landoni Marco, Smartt Stephen J., Campana Sergio, D'Avanzo Paolo, Claudi Riccardo, Schipani Pietro, Aliverti Matteo, Baruffolo Andrea, Ben-Ami Sagi, Capasso Giulio, Cosentino Rosario, D'Alessio Francesco, Hershko Ofir, Kuncarayakti Hanindyo, Munari Matteo, Pignata Giuliano, Radhakrishnan Kalyan, Rubin Adam, Scuderi Salvatore, Vitali Fabrizio, Achrén Jani, Araiza-Durán José Antonio, Arcavi Iair, Battaini Federico, Brucalassi Anna, Bruch Rachel, Cappellaro Enrico, Colapietro Mirko, Della Valle Massimo, Di Benedetto Rosario, D'Orsi Sergio, Gal-Yam Avishay, Genoni Matteo, Hernandez Marcos, Kotilainen Jari, Li Causi Gianluca, Marty Laurent, Mattila Seppo, Rappaport Michael, Ricci Davide, Riva Marco, Salasnich Bernardo, Sanchez Ricardo Zanmar, Stritzinger Maximilian, Ventura Hector Pérez


              •   (2022)  
                   Randriamanakoto Z., Väisänen P., Ranaivomanana P., Ramphul R., Kankare E., Mattila S., Ryder S.D., Kotilainen J.



                Last updated on 2025-12-09 at 13:46