Radoslaw Jan Wojtak

Radoslaw Jan Wojtak

Associate Professor


  1. 2023
  2. Published

    Relative Intrinsic Scatter in Hierarchical Type Ia Supernova Sibling Analyses: Application to SNe 2021hpr, 1997bq, and 2008fv in NGC 3147

    Ward, S. M., Thorp, S., Mandel, K. S., Dhawan, S., Jones, D. O., Taggart, K., Foley, R. J., Narayan, G., Chambers, K. C., Coulter, D. A., Davis, K. W., De Boer, T., De Soto, K., Earl, N., Gagliano, A., Gao, H., Hjorth, J., Huber, M. E., Izzo, L., Langeroodi, D. & 5 others, Magnier, E. A., Mcgill, P., Rest, A., Rojas-bravo, C. & Wojtak, Radoslaw Jan, 13 Oct 2023, In: Astrophysical Journal. 956, 2, 17 p., 111.

    Research output: Contribution to journalJournal articlepeer-review

  3. Published

    Measuring the Hubble constant with kilonovae using the expanding photosphere method

    Sneppen, Albert Bjerregård, Watson, Darach Jafar, Poznanski, D., Just, O., Bauswein, A. & Wojtak, Radoslaw Jan, 2 Oct 2023, In: Astronomy & Astrophysics. 678, 13 p., A14.

    Research output: Contribution to journalJournal articlepeer-review

  4. Published

    Two-population Bayesian hierarchical model of Type Ia supernovae

    Wojtak, Radoslaw Jan, Hjorth, Jens & Hjortlund, Jacob Osman, 11 Sep 2023, In: Monthly Notices of the Royal Astronomical Society. 525, 4, p. 5187-5203 17 p.

    Research output: Contribution to journalJournal articlepeer-review

  5. Published

    LensWatch. I. Resolved HST Observations and Constraints on the Strongly Lensed Type Ia Supernova 2022qmx (“SN Zwicky”)

    Pierel, J. D. R., Arendse, N., Ertl, S., Huang, X., Moustakas, L. A., Schuldt, S., Shajib, A. J., Shu, Y., Birrer, S., Bronikowski, M., Hjorth, J., Suyu, S. H., Agarwal, S., Agnello, A., Bolton, A. S., Chakrabarti, S., Cold, C., Courbin, F., Della Costa, J. M., Dhawan, S. & 25 others, Engesser, M., Fox, O. D., Gall, Christa, Gomez, S., Goobar, A., Jha, S. W., Jimenez, C., Johansson, J., Larison, C., Li, G., Marques-chaves, R., Mao, S., Mazzali, P. A., Perez-fournon, I., Petrushevska, T., Poidevin, F., Rest, A., Sheu, W., Shirley, R., Silver, E., Storfer, C., Strolger, L. G., Treu, T., Wojtak, Radoslaw Jan & Zenati, Y., 15 May 2023, In: Astrophysical Journal. 948, 2, 23 p., 115.

    Research output: Contribution to journalJournal articlepeer-review

  6. Published

    The Young Supernova Experiment Data Release 1 (YSE DR1): Light Curves and Photometric Classification of 1975 Supernovae

    Aleo, P. D., Malanchev, K., Sharief, S., Jones, D. O., Narayan, G., Foley, R. J., Villar, V. A., Angus, C. R., Baldassare, V. F., Bustamante-Rosell, M. J., Chatterjee, D., Cold, C., Coulter, D. A., Davis, K. W., Dhawan, S., Drout, M. R., Engel, A., French, K. D., Gagliano, A., Gall, C. & 67 others, Hjorth, Jens, Huber, M. E., Jacobson-Galan, W. V., Kilpatrick, C. D., Rangavar Langeroodi, Danial, Macias, P., Mandel, K. S., Margutti, R., Matasic, F., McGill, P., Pierel, J. D. R., Ramirez-Ruiz, E., Ransome, C. L., Rojas-Bravo, C., Siebert, M. R., Smith, K. W., de Soto, K. M., Stroh, M. C., Tinyanont, S., Taggart, K., Ward, S. M., Wojtak, Radoslaw Jan, Auchettl, K., Blanchard, P. K., de Boer, T. J. L., Boyd, B. M., Carroll, C. M., Chambers, K. C., DeMarchi, L., Dimitriadis, G., Dodd, S. A., Earl, N., Farías Hinojosa, Diego Andrés, Gao, H., Gomez, S., Grayling, M., Grillo, C., Hayes, E. E., Hung, T., Izzo, Luca, Khetan, Nandita, Kolborg, Anne Noer, Law-Smith, J. A. P., LeBaron, N., Lin, C. -., Luo, Y., Magnier, E. A., Matthews, D., Mockler, B., O'Grady, A. J. G., Pan, Y. -., Politsch, C. A., Raimundo, Sandra, Rest, A., Ridden-Harper, R., Sarangi, Arka, Schroder, S. L., Smartt, S. J., Terreran, G., Thorp, S., Vazquez, J., Wainscoat, R. J., Wang, Q., Wasserman, A. R., Yadavalli, S. K., Yarza, R. & Zenati, Y., 1 May 2023, In: Astrophysical Journal, Supplement Series. 266, 1, 46 p., 9.

    Research output: Contribution to journalJournal articlepeer-review

  7. 2022
  8. Published

    A fast-rising tidal disruption event from a candidate intermediate-mass black hole

    Angus, C. R., Baldassare, V. F., Mockler, B., Foley, R. J., Ramirez-Ruiz, E., Raimundo, S., French, K. D., Auchettl, K., Pfister, H., Gall, C., Hjorth, J., Drout, M. R., Alexander, K. D., Dimitriadis, G., Hung, T., Jones, D. O., Rest, A., Siebert, M. R., Taggart, K., Terreran, G. & 19 others, Tinyanont, S., Carroll, C. M., DeMarchi, L., Earl, N., Gagliano, A., Izzo, Luca, Villar, V. A., Zenati, Y., Arendse, N., Cold, Cecilie, de Boer, T. J. L., Chambers, K. C., Coulter, D. A., Khetan, Nandita, Lin, C. C., Magnier, E. A., Rojas-Bravo, C., Wainscoat, R. J. & Wojtak, Radoslaw Jan, 10 Nov 2022, In: Nature Astronomy. 6, p. 1452-1463 15 p.

    Research output: Contribution to journalJournal articlepeer-review

  9. Published

    Intrinsic tension in the supernova sector of the local Hubble constant measurement and its implications

    Wojtak, Radoslaw Jan & Hjorth, Jens, 2 Aug 2022, In: Monthly Notices of the Royal Astronomical Society. 515, 2, p. 2790-2799 10 p.

    Research output: Contribution to journalJournal articlepeer-review

  10. Published

    AI-driven spatio-temporal engine for finding gravitationally lensed type Ia supernovae

    Kodi Ramanah, D., Arendse, N. & Wojtak, Radoslaw Jan, 14 Apr 2022, In: Monthly Notices of the Royal Astronomical Society. 512, 4, p. 5404-5417 14 p.

    Research output: Contribution to journalJournal articlepeer-review

  11. 2021
  12. Published

    A new measurement of the Hubble constant using Type la supernovae calibrated with surface brightness fluctuations

    Khetan, N., Izzo, Luca, Branchesi, M., Wojtak, Radoslaw Jan, Cantiello, M., Murugeshan, C., Agnello, Adriano, Cappellaro, E., Della Valle, M., Gall, Christa, Hjorth, Jens, Benetti, S., Brocato, E., Burke, J., Hiramatsu, D., Howell, D. A., Tomasella, L. & Valenti, S., 12 Mar 2021, In: Astronomy & Astrophysics. 647, 20 p., A72.

    Research output: Contribution to journalJournal articlepeer-review

  13. Published

    Simulation-based inference of dynamical galaxy cluster masses with 3D convolutional neural networks

    Ramanah, D. K., Wojtak, Radoslaw Jan & Arendse, N., 1 Mar 2021, In: Monthly Notices of the Royal Astronomical Society. 501, 3, p. 4080-4091 12 p.

    Research output: Contribution to journalJournal articlepeer-review

  14. Published

    The Young Supernova Experiment: Survey Goals, Overview, and Operations

    Jones, D. O., Foley, R. J., Narayan, G., Hjorth, J., Huber, M. E., Aleo, P. D., Alexander, K. D., Angus, C. R., Auchettl, K., Baldassare, V. F., Bruun, S. H., Chambers, K. C., Chatterjee, D., Coppejans, D. L., Coulter, D. A., DeMarchi, L., Dimitriadis, G., Drout, M. R., Engel, A., French, K. D. & 51 others, Gagliano, A., Gall, Christa, Hung, T., Izzo, Luca, Jacobson-Galan, W. V., Kilpatrick, C. D., Korhonen, H., Margutti, R., Raimundo, Sandra, Ramirez-Ruiz, E., Rest, A., Rojas-Bravo, C., Siebert, M. R., Smartt, S. J., Smith, K. W., Terreran, G., Wang, Q., Wojtak, Radoslaw Jan, Agnello, Adriano, Ansari, Z., Arendse, N., Baldeschi, A., Blanchard, P. K., Brethauer, D., Bright, J. S., Brown, J. S., Boer, T. J. L. D., Dodd, S. A., Fairlamb, J. R., Grillo, C., Hajela, A., Cold, Cecilie, Kolborg, Anne Noer, Law-Smith, J. A. P., Lin, C. -., Magnier, E. A., Malanchev, K., Matthews, D., Mockler, B., Muthukrishna, D., Pan, Y. -., Pfister, H., Ramanah, D. K., Rest, S., Sarangi, Arka, Schroder, S. L., Stauffer, C., Stroh, M. C., Taggart, K. L., Tinyanont, S. & Wainscoat, R. J., Feb 2021, In: Astrophysical Journal. 908, 2, 24 p., 143.

    Research output: Contribution to journalJournal articlepeer-review

  15. 2020
  16. Published

    Dynamical mass inference of galaxy clusters with neural flows

    Ramanah, D. K., Wojtak, Radoslaw Jan, Ansari, Z., Gall, Christa & Hjorth, Jens, 21 Sep 2020, In: Monthly Notices of the Royal Astronomical Society. 499, 2, p. 1985-1997 13 p.

    Research output: Contribution to journalJournal articlepeer-review

  17. Published

    Cosmic dissonance: are new physics or systematics behind a short sound horizon?

    Arendse, N., Wojtak, Radoslaw Jan, Agnello, Adriano, Chen, G. C., Fassnacht, C. D., Sluse, D., Hilbert, S., Millon, M., Bonvin, V., Wong, K. C., Courbin, F., Suyu, S. H., Birrer, S., Treu, T. & Koopmans, L. V. E., 7 Jul 2020, In: Astronomy & Astrophysics. 639, 13 p., A57.

    Research output: Contribution to journalJournal articlepeer-review

  18. Published

    The Lowest of the Low: Discovery of SN 2019gsc and the Nature of Faint Iax Supernovae

    Srivastav, S., Smartt, S. J., Leloudas, G., Huber, M. E., Chambers, K., Malesani, D. B., Hjorth, Jens, Gillanders, J. H., Schultz, A., Sim, S. A., Auchettl, K., Fynbo, Johan Peter Uldall, Gall, Christa, McBrien, O. R., Rest, A., Smith, K. W., Wojtak, Radoslaw Jan & Young, D. R., 1 Apr 2020, In: Astrophysical Journal Letters. 892, 2, 8 p., L24.

    Research output: Contribution to journalLetterpeer-review

  19. Published

    Pan-STARRS1 Transient Discovery Report for 2020-01-08

    Jones, D. O., French, K. D., Agnello, A., Angus, C. R., Ansari, Z., Arendse, N., Gall, C., Grillo, C., Bruun, S. H., Hede, C., Hjorth, J., Izzo, L., Korhonen, H., Raimundo, S., Ramanah, D. K., Sarangi, A., Wojtak, R., Chambers, K. C., Huber, M. E., Magnier, E. A. & 31 others, Boer, T. J. L. D., Fairlamb, J. R., Lin, C. C., Wainscoat, R. J., Lowe, T., Willman, M., Bulger, J., Schultz, A. S. B., Engel, A., Gagliano, A., Narayan, G., Soraisam, M., Wang, Q., Rest, A., Smartt, S. J., Smith, K. W., Alexander, K., Baldeschi, A., Blanchard, P., Coppejans, D., DeMarchi, L., Hajela, A., Jacobson-Galan, W., Margutti, R., Matthews, D., Stauffer, C., Stroh, M., Terreran, G., Drout, M., Auchettl, K. & Young Supernova Experiment (YSE), Y. S. E. (., 1 Jan 2020, In: Transient Name Server Discovery Report, No. 2020-76. 76

    Research output: Contribution to journalJournal articlepeer-review

  20. Published

    YSE/Pan-STARRS1 Transient Discovery Report for 2020-01-31

    Jones, D. O., French, K. D., Agnello, A., Angus, C. R., Ansari, Z., Arendse, N., Gall, C., Grillo, C., Bruun, S. H., Hede, C., Hjorth, J., Izzo, L., Korhonen, H., Raimundo, S., Ramanah, D. K., Sarangi, A., Wojtak, R., Chambers, K. C., Huber, M. E., Magnier, E. A. & 31 others, Boer, T. J. L. D., Fairlamb, J. R., Lin, C. C., Wainscoat, R. J., Lowe, T., Willman, M., Bulger, J., Schultz, A. S. B., Engel, A., Gagliano, A., Narayan, G., Soraisam, M., Wang, Q., Rest, A., Smartt, S. J., Smith, K. W., Alexander, K., Baldeschi, A., Blanchard, P., Coppejans, D., DeMarchi, L., Hajela, A., Jacobson-Galan, W., Margutti, R., Matthews, D., Stauffer, C., Stroh, M., Terreran, G., Drout, M., Auchettl, K. & Young Supernova Experiment (YSE), Y. S. E. (., 1 Jan 2020, In: Transient Name Server Discovery Report, No. 2020-76. 341

    Research output: Contribution to journalJournal articlepeer-review

  21. 2019
  22. Published

    Low-redshift measurement of the sound horizon through gravitational time-delays

    Arendse, N., Agnello, Adriano & Wojtak, Radoslaw Jan, 9 Dec 2019, In: Astronomy & Astrophysics. 632, 6 p., A91.

    Research output: Contribution to journalJournal articlepeer-review

  23. Published

    Einstein-Vlasov calculations of structure formation

    East, W. E., Wojtak, Radoslaw Jan & Pretorius, F., 27 Nov 2019, In: Physical Review D. 100, 10, 10 p., 103533.

    Research output: Contribution to journalJournal articlepeer-review

  24. Published

    A New Measurement of the Hubble Constant and Matter Content of the Universe Using Extragalactic Background Light γ-Ray Attenuation

    Dominguez, A., Wojtak, Radoslaw Jan, Finke, J., Ajello, M., Helgason, K., Prada, F., Desai, A., Paliya, V., Marcotulli, L. & Hartmann, D. H., 10 Nov 2019, In: Astrophysical Journal. 885, 2, 7 p., 137.

    Research output: Contribution to journalJournal articlepeer-review

  25. Published

    Magnified or multiply imaged? - Search strategies for gravitationally lensed supernovae in wide-field surveys

    Wojtak, Radoslaw Jan, Hjorth, Jens & Gall, Christa, 1 Aug 2019, In: Monthly Notice of the Royal Astronomical Society. 487, 3, p. 3342-3355 13 p.

    Research output: Contribution to journalJournal articlepeer-review

  26. Published

    The Hubble-Lemaitre constant and sound horizon from low-redshift probes

    Wojtak, Radoslaw Jan & Agnello, Adriano, 4 Jul 2019, In: Monthly Notices of the Royal Astronomical Society. 486, 4, p. 5046-5051 6 p.

    Research output: Contribution to journalJournal articlepeer-review

  27. 2018
  28. Published

    Galaxy Cluster Mass Reconstruction Project - IV. Understanding the effects of imperfect membership on cluster mass estimation

    Wojtak, Radoslaw Jan, Old, L., Mamon, G. A., Pearce, F. R., de Carvalho, R., Sifon, C., Gray, M. E., Skibba, R. A., Croton, D., Bamford, S., Gifford, D., von der Linden, A., Munoz-Cuartas, J. C., Mueller, V., Pearson, R. J., Rozo, E., Rykoff, E., Saro, A., Sepp, T. & Tempel, E., 2 Nov 2018, In: Monthly Notices of the Royal Astronomical Society. 481, 1, p. 324-340 17 p.

    Research output: Contribution to journalJournal articlepeer-review

  29. Published

    Galaxy Cluste Mass Reconstruction Project - III. The impact of dynamical substructure on cluster mass estimates

    Old, L., Wojtak, Radoslaw Jan, Pearce, F. R., Gray, M. E., Mamon, G. A., Sifon, C., Tempel, E., Biviano, A., Yee, H. K. C., de Carvalho, R., Mueller, V., Sepp, T., Skibba, R. A., Croton, D., Bamford, S. P., Power, C., von der Linden, A. & Saro, A., 21 Mar 2018, In: Monthly Notices of the Royal Astronomical Society. 475, 1, p. 853-866

    Research output: Contribution to journalJournal articlepeer-review

  30. Published

    Comparing fully general relativistic and Newtonian calculations of structure formation

    East, W. E., Wojtak, Radoslaw Jan & Abel, T., 13 Feb 2018, In: Physical Review D. 97, 4, 15 p., 043509.

    Research output: Contribution to journalJournal articlepeer-review

  31. 2017
  32. Published

    The Distance to NGC 4993: The Host Galaxy of the Gravitational-wave Event GW170817

    Hjorth, Jens, Levan, A. J., Tanvir, N. R., Lyman, J. D., Wojtak, Radoslaw Jan, Schroder, S. L., Mandel, I., Gall, Christa & Bruun, S. H., 20 Oct 2017, In: Astrophysics Journal Letters. 848, 2, L31.

    Research output: Contribution to journalJournal articlepeer-review

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