See list of all publications here

Selected papers:

• Discovery of SN 2025wny: a Strongly Gravitationally Lensed Superluminous Supernova at z = 2.01
  Johansson, J.; Perley, D. A.; Goobar, A.; and 32 coauthors
  The Astrophysical Journal Letters, Vol. 995, L17 (2025)

• Strongly lensed supernovae: lessons learned
  Goobar, A.; Johansson, J. and Sagués Carracedo, A
  Phil. Trans. A, Vol. 383, 2294 (2025)

• Ground-based and JWST Observations of SN 2022pul: I. Unusual Signatures of Carbon, Oxygen, and Circumstellar Interaction in a Peculiar Type Ia Supernova
  Siebert, M. R.; Kwok, L. A.; Johansson, J.; and 79 coauthors
  The Astrophysical Journal, Vol. 960, 88 (2024)

• ZTF SN Ia DR2: Cosmology-independent constraints on Type Ia supernova standardisation from supernova siblings
  Dhawan, S.; Mortsell, E.; Johansson, J. and 18 coauthors
  Submitted to A&A (2024)

• Uncovering a population of gravitational lens galaxies with magnified standard candle SN Zwicky
  Goobar, A.; Johansson, J.; Schulze, S. and 34 coauthors
  Nature Astronomy, 7, 1098 (2023)

• A radio-detected type Ia supernova with helium-rich circumstellar material
  Kool, E.; Johansson, J.; Sollerman, J. and 34 coauthors
  Nature, Vol. 617, 7961, p. 477 (2023)

• A Uniform Type Ia Supernova Distance Ladder with the Zwicky Transient Facility: Absolute Calibration Based on the Tip of the Red Giant Branch (TRGB) Method
  Dhawan, S.; Goobar, A.; Johansson, J. and 21 coauthors
  The Astrophysical Journal, Vol. 934, 185 (2022)

• Sensitivity of the Hubble Constant Determination to Cepheid Calibration
  Mörtsell, E.; Goobar, A.; Johansson, J.; and Dhawan, S.
  The Astrophysical Journal, Vol. 933, 212 (2022)

• Near-IR Type Ia SN distances: host galaxy extinction and mass-step corrections revisited
  Johansson, J.; Cenko, S. B.; Fox, O. D; and 17 coauthors
  The Astrophysical Journal, Vol. 923, 237 (2021)

• Spectroscopy of the first resolved strongly lensed Type Ia supernova iPTF16geu
  Johansson, J.; Goobar, A.; Price, S. H.; and 14 coauthors
  Monthly Notices of the Royal Astronomical Society, Vol. 502, 510 (2021)