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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  • PESSTO spectroscopic classification of optical transients #8320  (2015)   Harmanen J., Kuncarayakti H., Mattila S., Kangas T., Botticella M. T., Fraser M., Inserra C., Kankare E., Maguire K., Smartt S. J., Smith K. W., Sullivan M., Valenti S., Yaron O., Young D., Manulis I., Wright D., Chambers K., Flewelling H., Huber M., Magnier E., Tonry J., Waters C., Wainscoat R. J., Wyrzykowski L.


  • PESSTO spectroscopic classification of optical transients #8325  (2015)   Kuncarayakti H., Harmanen J., Kangas T., Mattila S., Fraser M., Botticella M. T., Inserra C., Kankare E., Maguire K., Smartt S. J., Smith K. W., Sullivan M., Valenti S., Yaron O., Young D., Manulis I., Baltay C., Ellman N., Hadjiyska E., McKinnon R., Rabinowitz D., Rostami S., Feindt U., Kowalski M., Nugent P., Wright D., Chambers K., Flewelling H., Huber M., Magnier E., Tonry J., Waters C., Wainscoat R. J.


  • PESSTO: survey description and products from the first data release by the Public ESO Spectroscopic Survey of Transient Objects  (2015)  
    • Astronomy and Astrophysics
     S. J. Smartt, S. Valenti, M. Fraser, C. Inserra, D. R. Young, M. Sullivan, A. Pastorello, S. Benetti, A. Gal-Yam, C. Knapic, M. Molinaro, R. Smareglia, K. W. Smith, S. Taubenberger, O. Yaron, J. P. Anderson, C. Ashall, C. Balland, C. Baltay, C. Barbarino, F. E. Bauer, S. Baumont, D. Bersier, N. Blagorodnova, S. Bongard, M. T. Botticella, F. Bufano, M. Bulla, E. Cappellaro, H. Campbell, F. Cellier-Holzem, T.-W. Chen, M. J. Childress, A. Clocchiatti, C. Contreras, M. Dall’Ora, J. Danziger, T. de Jaeger, A. De Cia, M. Della Valle, M. Dennefeld, N. Elias-Rosa, N. Elman, U. Feindt, M. Fleury, E. Gall, S. Gonzalez-Gaitan, L. Galbany, A. Morales Garoffolo, L. Greggio, L. L. Guillou, S. Hachinger, E. Hadjiyska, P. E. Hage, W. Hillebrandt, S. Hodgkin, E. Y. Hsiao, P. A. James, A. Jerkstrand, T. Kangas, E. Kankare, R. Kotak, M. Kromer, H. Kuncarayakti, G. Leloudas, P. Lundqvist, J. D. Lyman, I. M. Hook, K. Maguire, I. Manulis, S. J. Margheim, S. Mattila, J. R. Maund, P. A. Mazzali, M. McCrum, R. McKinnon, M. E. Moreno-Raya, M. Nicholl, P. Nugent, R. Pain, G. Pignata, M. M. Phillips, J. Polshaw, M. L. Pumo, D. Rabinowitz, E. Reilly, C. Romero-Cañizales, R. Scalzo, B. Schmidt, S. Schulze, S. Sim, J. Sollerman, F. Taddia, L. Tartaglia, G. Terreran, L. Tomasella, M. Turatto, E. Walker, N. A. Walton, L. Wyrzykowski, F. Yuan, and L. Zampieri


  • Selecting superluminous supernovae in faint galaxies from the first year of the Pan-STARRS1 Medium Deep Survey  (2015)  
    • Monthly Notices of the Royal Astronomical Society
     McCrum M., Smartt S. J., Rest A., Smith K., Kotak R., Rodney S. A., Young D. R., Chornock R., Berger E., Foley R. J., Fraser M., Wright D., Scolnic D., Tonry J. L., Urata Y., Huang K., Pastorello A., Botticella M. T., Valenti S., Mattila S., Kankare E., Farrow D. J., Huber M. E., Stubbs C. W., Kirshner R. P., Bresolin F., Burgett W. S., Chambers K. C., Draper P. W., Flewelling H., Jedicke R., Kaiser N., Magnier E. A., Metcalfe N., Morgan J. S., Price P. A., Sweeney W., Wainscoat R. J., Waters C.


  • SN 2009ip at late times - an interacting transient at+2 years  (2015)  
    • Monthly Notices of the Royal Astronomical Society
     Fraser M, Kotak R, Pastorello A, Jerkstrand A, Smartt SJ, Chen TW, Childress M, Gilmore G, Inserra C, Kankare E, Margheim S, Mattila S, Valenti S, Ashall C, Benetti S, Botticella MT, Bauer FE, Campbell H, Elias-Rosa N, Fleury M, Gal-Yam A, Hachinger S, Howell DA, Le Guillou L, Leget PF, Morales-Garoffolo A, Polshaw J, Spiro S, Sullivan M, Taubenberger S, Turatto M, Walker ES, Young DR, Zhang B


  • Supernova 2014eg in ESO 154-G10  (2015)  Central Bureau Electronic Telegrams Kangas T., Mattila S., Kankare E., Dimitriadis G., Smith M., Firth R., Galbany L., Inserra C., Maguire K., Smartt S. J., Smith K. W., Sullivan M., Valenti S., Yaron O., Young D., Manulis I., Baltay C., Ellman N., Hadjiyska E., McKinnon R., Rabinowitz D., Walker E. S., Rostami S., Feindt U., Kowalski M., Nugent P., Wyrzykowski L.


  • The destruction of the circumstellar ring of SN 1987A  (2015)  
    • Astrophysical Journal Letters
     Fransson C, Larsson J, Migotto K, Pesce D, Challis P, Chevalier RA, France K, Kirshner RP, Leibundgut B, Lundqvist P, McCray R, Spyromilio J, Taddia F, Jerkstrand A, Mattila S, Smith N, Sollerman J, Wheeler JC, Crotts A, Garnavich P, Heng K, Lawrence SS, Panagia N, Pun CSJ, Sonneborn G, Sugerman B


  • Toward characterization of the type IIP supernova progenitor population: a statistical sample of light curves from Pan-STARRS1  (2015)  
    • Astrophysical Journal
     N. E. Sanders, A. M. Soderberg, S. Gezari, M. Betancourt, R. Chornock, E. Berger, R. J. Foley, P. Challis, M. Drout, R. P. Kirshner, R. Lunnan, G. H. Marion, R. Margutti, R. McKinnon, D. Milisavljevic, G. Narayan, A. Rest, E. Kankare, S. Mattila, S. J. Smartt, M. E. Huber, W. S. Burgett, P. W. Draper, K. W. Hodapp, N. Kaiser, R. P. Kudritzki, E. A. Magnier, N. Metcalfe, J. S. Morgan, P. A. Price, J. L. Tonry, R. J. Wainscoat, C. Waters


  • Whatever happened to the progenitors of supernovae 2008cn, 2009kr and 2009md?  (2015)  
    • Monthly Notices of the Royal Astronomical Society
     Maund Justyn R., Fraser Morgan, Reilly Emma, Ergon Mattias, Mattila, Seppo


  • A late-time view of the progenitors of five Type IIP supernovae  (2014)  
    • Monthly Notices of the Royal Astronomical Society
     Maund JR, Reilly E, Mattila S


  • A new precise mass for the progenitor of the Type IIP SN 2008bk  (2014)  
    • Monthly Notices of the Royal Astronomical Society
     Maund JR, Mattila S, Ramirez-Ruiz E, Eldridge JJ


  • Extending the supernova Hubble diagram to z similar to 1.5 with the Euclid space mission  (2014)  
    • Astronomy and Astrophysics
     Astier P, Balland C, Brescia M, Cappellaro E, Carlberg RG, Cavuoti S, Della Valle M, Gangler E, Goobar A, Guy J, Hardin D, Hook IM, Kessler R, Kim A, Linder E, Longo G, Maguire K, Mannucci F, Mattila S, Nichol R, Pain R, Regnault N, Spiro S, Sullivan M, Tao C, Turatto M, Wang XF, Wood-Vasey WM


  • High-density circumstellar interaction in the luminous type IIn SN 2010jl: The first 1100 days  (2014)  
    • Astrophysical Journal
     Fransson C., Ergon M., Challis P., Chevalier R., France K., Kirshner R., Marion G., Milisavljevic D., Smith N., Bufano F., Friedman A., Kangas T., Larsson J., Mattila S., Benetti S., Chornock R., Czekala I., Soderberg A., Sollerman J.


  • Low luminosity Type II supernovae - II. Pointing towards moderate mass precursors  (2014)  
    • Monthly Notices of the Royal Astronomical Society
     Spiro S, Pastorello A, Pumo ML, Zampieri L, Turatto M, Smartt SJ, Benetti S, Cappellaro E, Valenti S, Agnoletto I, Altavilla G, Aoki T, Brocato E, Corsini EM, Di Cianno A, Elias-Rosa N, Hamuy M, Enya K, Fiaschi M, Folatelli G, Desidera S, Harutyunyan A, Howell DA, Kawka A, Kobayashi Y, Leibundgut B, Minezaki T, Navasardyan H, Nomoto K, Mattila S, Pietrinferni A, Pignata G, Raimondo G, Salvo M, Schmidt BP, Sollerman J, Spyromilio J, Taubenberger S, Valentini G, Vennes S, Yoshii Y


  • Optical and near-infrared observations of SN 2011dh-The first 100 days  (2014)  
    • Astronomy and Astrophysics
     Ergon M, Sollerman J, Fraser M, Pastorello A, Taubenberger S, Elias-Rosa N, Bersten M, Jerkstrand A, Benetti S, Botticella MT, Fransson C, Harutyunyan A, Kotak R, Smartt S, Valenti S, Bufano F, Cappellaro E, Fiaschi M, Howell A, Kankare E, Magill L, Mattila S, Maund J, Naves R, Ochner P, Ruiz J, Smith K, Tomasella L, Turatto M


  • Possible supernova in ESO 154-G010 discovered by PESSTO  (2014)  Astronomers Telegrams Kangas T., Mattila S., Kankare E., Dimitriadis G., Smith M., Firth R., Galbany L., Inserra C., Maguire K., Smartt S. J., Smith K. W., Sullivan M., Valenti S., Yaron O., Young D., Manulis I.


  • Radio Detection of SN 2014bc in NGC 4258 with eMERLIN #6270  (2014)  Astronomer's Telegram Argo M, Perez-Torres M, Alberdi A, Beswick R, Conway J, Elias-Rosa N, Herrero-Illana R, Kotak R, Lundqvist P, Mattila S, Marcaide J, Muxlow T, Marti-Vidal I, Ramirez-Olivencia N, Romero-Canizales C, Stockdale C, Varenius E


  • Radio Detection of SN 2014bc in NGC 4258 with eMERLIN #6273  (2014)  Astronomer's Telegram Argo M., Perez-Torres M., Alberdi A., Beswick R., Conway J., Elias-Rosa N., Herrero-Illana R., Kotak R., Lundqvist P., Mattila S., Marcaide J., Muxlow T., Marti-Vidal I., Ramirez-Olivencia N., Romero-Canizales C., Stockdale C., Varenius E.


  • RAPIDLY EVOLVING AND LUMINOUS TRANSIENTS FROM PAN-STARRS1  (2014)  
    • Astrophysical Journal
     Drout MR, Chornock R, Soderberg AM, Sanders NE, McKinnon R, Rest A, Foley RJ, Milisavljevic D, Margutti R, Berger E, Calkins M, Fong W, Gezari S, Huber ME, Kankare E, Kirshner RP, Leibler C, Lunnan R, Mattila S, Marion GH, Narayan G, Riess AG, Roth KC, Scolnic D, Smartt SJ, Tonry JL, Burgett WS, Chambers KC, Hodapp KW, Jedicke R, Kaiser N, Magnier EA, Metcalfe N, Morgan JS, Price PA, Waters C


  • SN 2005at-A neglected type Ic supernova at 10 Mpc  (2014)  
    • Astronomy and Astrophysics
     Kankare E, Fraser M, Ryder S, Romero-Canizales C, Mattila S, Kotak R, Laursen P, Monard LAG, Salvo M, Vaisanen P



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