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The ambiguous AT2022rze: Changing-look AGN mimicking a supernova in a merging galaxy system and 31 coauthors Submitted to MNRAS (2025) JWST and Ground-based Observations of the Type Iax Supernovae SN 2024pxl and SN 2024vjm: Evidence for Weak Deflagration Explosions and 89 coauthors Submitted to ApJ (2025) Photometry and Spectroscopy of SN 2024pxl: A Luminosity Link Among Type Iax Supernovae and 89 coauthors Submitted to ApJ (2025) Very Late-Time JWST and Keck Spectra of the Oxygen-Rich Supernova 1995N and 43 coauthors Submitted to ApJ (2025) Large Cold Dust Reservoir Revealed in Transitional SN Ib 2014C by James Webb Space Telescope Mid-Infrared Spectroscopy and 30 coauthors Accepted for publication in ApJ (2025) The La Silla Schmidt Southern Survey and 75 coauthors Submitted to PASP (2025) JWST/MIRI detects the dusty SN1993J about 30 years after explosion and 37 coauthors Accepted to A&A (2025) Precursor Activity Preceding Interacting Supernovae I: Bridging the Gap with SN 2022mop and 41 coauthors Submitted to A&A (2025) ZTF SN Ia DR2: Improved SN Ia colors through expanded dimensionality with SALT3+ and 24 coauthors Submitted to A&A (2025) ZTF SN Ia DR2: High-velocity components in the Si II λ6355 and 27 coauthors Submitted to A&A (2025) ZTF SN Ia DR2: An environmental study of Type Ia supernovae using host galaxy image decomposition and 18 coauthors Astronomy & Astrophysics, Vol. 694, id.A14 (2025) ZTF SN Ia DR2: Properties of the low-mass host galaxies of Type Ia supernovae in a volume-limited sample and 25 coauthors Astronomy & Astrophysics, Vol. 694, id.A13 (2025) ZTF SN Ia DR2: The secondary maximum in Type Ia supernovae and 24 coauthors Astronomy & Astrophysics, Vol. 694, id.A12 (2025) ZTF SN Ia DR2: The diversity and relative rates of the thermonuclear SN population and 27 coauthors Astronomy & Astrophysics, Vol. 694, id.A10 (2025) ZTF SN Ia DR2: The spectral diversity of Type Ia supernovae in a volume-limited sample and 30 coauthors Astronomy & Astrophysics, Vol. 694, id.A9 (2025) ZTF SN Ia DR2: Peculiar velocities impact on the Hubble diagram and 35 coauthors Astronomy & Astrophysics, Vol. 694, id.A8 (2025) ZTF SN Ia DR2: Exploring SN Ia properties in the vicinity of under-dense environments and 29 coauthors Astronomy & Astrophysics, Vol. 694, id.A7 (2025) ZTF SN Ia DR2: Impact of the galaxy cluster environment on the stretch distribution of Type Ia supernovae and 27 coauthors Astronomy & Astrophysics, Vol. 694, id.A6 (2025) ZTF SN Ia DR2: Evidence of Changing Dust Distributions With Redshift Using Type Ia Supernovae and 29 coauthors Astronomy & Astrophysics, Vol. 694, id.A5 (2025) ZTF SN Ia DR2: Colour standardisation of Type Ia Supernovae and its dependence on environment and 37 coauthors Astronomy & Astrophysics, Vol. 694, id.A4 (2025) ZTF SN Ia DR2: Simulations and volume-limited sample and 28 coauthors Astronomy & Astrophysics, Vol. 694, id.A3 (2025) ZTF SN Ia DR2: Study of Type Ia Supernova lightcurve fits and 35 coauthors Astronomy & Astrophysics, Vol. 694, id.A2 (2025) ZTF SN Ia DR2: Overview and 53 coauthors Astronomy & Astrophysics, Vol. 694, id.A1 (2025) Candidate strongly-lensed Type Ia supernovae in the Zwicky Transient Facility archive and 61 coauthors Astronomy & Astrophysics, Vol. 694, id.A146 (2025) Microlensing of lensed supernovae Zwicky & iPTF16geu: constraints on the lens galaxy mass slope and dark compact object fraction and 8 coauthors Submitted to Open Journal of Astrophysics (2025) How accurate are transient spectral classification tools? – A study using 4,646 SEDMachine spectra and 13 coauthors Publications of the Astronomical Society of the Pacific, 136:114501 (2024) LensWatch: II. Improved Photometry and Time Delay Constraints on the Strongly-Lensed Type Ia Supernova 2022qmx (“SN Zwicky”) with HST Template Observations and 34 coauthors The Astrophysical Journal, Vol. 980, Issue 2, id.172 (2025) JWST/MIRI Observations of Newly Formed Dust in the Cold, Dense Shell of the Type IIn SN 2005ip and 42 coauthors Submitted to ApJ (2024) Strongly lensed supernovae: lessons learned Johansson, J. and Sagués Carracedo, APhil. Trans. A, Vol. 383, Issue 2294, (2025) ZTF SN Ia DR2: Cosmology-independent constraints on Type Ia supernova standardisation from supernova siblings Johansson, J. ; and 18 coauthors Submitted to A&A (2024) Detectability and Characterisation of Strongly Lensed Supernova Lightcurves in the Zwicky Transient Facility and 7 coauthors Submitted to A&A (2024) ZTF SN Ia DR2: Environmental dependencies of stretch and luminosity of a volume limited sample of 1,000 Type Ia Supernovae and 43 coauthors Submitted to A&A (2024) The carbon-rich type Ic supernova 2016adj in the iconic dust lane of Centaurus A: Potential signatures of an interaction with circumstellar hydrogen and 26 coauthors Astronomy & Astrophysics, Vol. 686, 79 (2024) JWST Spectroscopy of SN H0pe: Classification and Time Delays of a Triply-imaged Type Ia Supernova at z = 1.78 and 19 coauthors The Astrophysical Journal, Vol. 970, 102 (2024) JWST Photometric Time-delay and Magnification Measurements for the Triply Imaged Type Ia “SN H0pe” at z = 1.78 and 60 coauthors The Astrophysical Journal, Vol. 967, 50 (2024) Resolving the explosion of supernova 2023ixf in Messier 101 within its complex circumstellar environment and 54 coauthors Nature, Vol. 627, p. 759 (2024) Ground-based and JWST Observations of SN 2022pul. II. Evidence from Nebular Spectroscopy for a Violent Merger in a Peculiar Type Ia Supernova Johansson, J. ; and 78 coauthors The Astrophysical Journal, Vol. 966, 135 (2024) Ground-based and JWST Observations of SN 2022pul: I. Unusual Signatures of Carbon, Oxygen, and Circumstellar Interaction in a Peculiar Type Ia Supernova Johansson, J. ; and 79 coauthors The Astrophysical Journal, Vol. 960, 88 (2024) Evaluating the Consistency of Cosmological Distances Using Supernova Siblings in the Near-infrared and 7 coauthors The Astrophysical Journal, Vol. 965, 90 (2024) The DEHVILS in the details: Type Ia supernova Hubble residual comparisons and mass step analysis in the near-infrared and 11 coauthors Astronomy & Astrophysics, Vol. 690, 56P (2024) Serendipitous detection of the dusty Type IIL SN 1980K with JWST/MIRI and 39 coauthors Monthly Notices of the Royal Astronomical Society, Vol. 529, 155 (2024) Light-curve Structure and Hα Line Formation in the Tidal Disruption Event AT 2019azh and 33 coauthors The Astrophysical Journal, Vol. 969, 104 (2024) An updated measurement of the Hubble constant from near-infrared observations of Type Ia supernovae and 11 coauthors Astronomy & Astrophysics, Vol. 679, 95G (2023) Uncovering a population of gravitational lens galaxies with magnified standard candle SN Zwicky Johansson, J. ; Schulze, S. and 34 coauthors Nature Astronomy, Vol. 7, 1098 (2023) SN 2022joj: A Peculiar Type Ia Supernova Possibly Driven by an Asymmetric Helium-shell Double Detonation and 28 coauthors The Astrophysical Journal, Vol. 958, 178 (2023) JWST observations of dust reservoirs in type IIP supernovae 2004et and 2017eaw and 36 coauthors Monthly Notices of the Royal Astronomical Society, Vol. 523, 6048 (2023) Over 500 Days in the Life of the Photosphere of the Type Iax Supernova SN 2014dt and 20 coauthors The Astrophysical Journal, Vol. 951, 67 (2023) A radio-detected type Ia supernova with helium-rich circumstellar material Johansson, J. ; Sollerman, J. and 34 coauthors Nature, Vol. 617, 7961, p. 477 (2023) SN 2021zny: an early flux excess combined with late-time oxygen emission suggests a double white dwarf merger event and 28 coauthors Monthly Notices of the Royal Astronomical Society, Vol. 521, 1162 (2023) LensWatch. 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Resolved HST Observations and Constraints on the Strongly Lensed Type Ia Supernova 2022qmx (“SN Zwicky”) and 39 coauthors The Astrophysical Journal, Vol. 948, 115 (2023) A Systematic Study of Ia-CSM Supernovae from the ZTF Bright Transient Survey and 35 coauthors The Astrophysical Journal, Vol. 948, 52 (2023) A JWST Near- and Mid-infrared Nebular Spectrum of the Type Ia Supernova 2021aefx and 55 coauthors The Astrophysical Journal Letters, Vol. 944, L3 (2023) The Hubble Tension Revisited: Additional Local Distance Ladder Uncertainties Johansson, J. ; and Dhawan, S.The Astrophysical Journal, Vol. 935, 58 (2022) 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 Johansson, J. and 21 coauthorsThe Astrophysical Journal, Vol. 934, 185 (2022) Progenitor, environment, and modelling of the interacting transient AT 2016jbu (Gaia16cfr) Johansson, J. ; and 67 coauthors Monthly Notices of the Royal Astronomical Society, Vol. 513, 5666 (2022) Photometric and spectroscopic evolution of the interacting transient AT 2016jbu (Gaia16cfr) Johansson, J. ; and 68 coauthors Monthly Notices of the Royal Astronomical Society, Vol. 513, 5642 (2022) Sensitivity of the Hubble Constant Determination to Cepheid Calibration Johansson, J. ; and Dhawan, S.The Astrophysical Journal, Vol. 933, 212 (2022) Microlensing and the type Ia supernova iPTF16geu Johansson, J. and 3 coauthorsAstronomy & Astrophysics, Vol. 662, 34 (2022) The Zwicky Transient Facility Type Ia supernova survey: first data release and results Johansson, J. and 16 coauthorsMonthly Notices of the Royal Astronomical Society, Vol. 510, 2228 (2022) Two c’s in a pod: Cosmology independent measurement of the Type Ia supernova colour-luminosity relation with a sibling pair Johansson, J. and 17 coauthors Monthly Notices of the Royal Astronomical Society, Vol. 509, 5340 (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) AT 2019qyl in NGC 300: Internal Collisions in the Early Outflow from a Very Fast Nova in a Symbiotic Binary and 38 coauthors The Astrophysical Journal, Vol. 920, 127 (2021) Spitzer’s Last Look at Extragalactic Explosions: Long-Term Evolution of Interacting Supernovae and 10 coauthors The Astrophysical Journal, Vol. 919, 17 (2021) The Palomar Transient Factory Core-collapse Supernova Host-galaxy Sample. I. Host-galaxy Distribution Functions and Environment Dependence of Core-collapse Supernovae The Astrophysical Journal Supplement Series, Vol. 255, 29 (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) Progenitor, precursor, and evolution of the dusty remnant of the stellar merger M31-LRN-2015 and 12 coauthors Monthly Notices of the Royal Astronomical Society, Vol. 496, 5503 (2020) Lens modelling of the strongly lensed Type Ia supernova iPTF16geu Johansson, J. ; Dhawan, S.; Goobar, A.; Amanullah, R.; and 1 coauthor Monthly Notices of the Royal Astronomical Society, Vol. 496, 3270 (2020) Magnification, dust, and time-delay constraints from the first resolved strongly lensed Type Ia supernova iPTF16geu Johansson, J. ; Goobar, A.; Amanullah, R.; Mörtsell, E.; and 12 coauthors Monthly Notices of the Royal Astronomical Society, Vol. 491, 2639 (2020) The SPIRITS Sample of Luminous Infrared Transients: Uncovering Hidden Supernovae and Dusty Stellar Outbursts in Nearby Galaxies and 21 coauthors The Astrophysical Journal, Vol. 886, 40J (2019). R-band light-curve properties of Type Ia supernovae from the (intermediate) Palomar Transient Factory and 13 coauthors Monthly Notices of the Royal Astronomical Society, Vol. 483, 5045 (2019) iPTF16abc and the population of Type Ia supernovae: comparing the photospheric, transitional, and nebular phases Johansson, J. ; and 4 coauthors Monthly Notices of the Royal Astronomical Society, Vol. 480, 1445 (2018) iPTF 16hgs: A Double-peaked Ca-rich Gap Transient in a Metal-poor, Star-forming Dwarf Galaxy and 16 coauthors The Astrophysical Journal, Vol. 866, 72D (2018). SPIRITS 16tn in NGC 3556: A Heavily Obscured and Low-luminosity Supernova at 8.8 Mpc and 15 coauthors The Astrophysical Journal, Vol. 863, 20J (2018). The dusty aftermath of SN Hunt 248: merger-burst remnant? Johansson, J. ; Fox, O. D.; Filippenko, A. V.; and 1 coauthors Monthly Notices of the Royal Astronomical Society, Vol. 473, 3765 (2018) No Evidence of Circumstellar Gas Surrounding Type Ia Supernova SN 2017cbv Johansson, J. ; and 1 coauthors The Astrophysical Journal Letters, Vol. 851, 43F (2017). iPTF16geu: A multiply imaged, gravitationally lensed type Ia supernova Johansson, J. ; and 29 coauthors Science, Vol. 356, 291 (2017). Spitzer observations of SN 2014J and properties of mid-IR emission in Type Ia supernovae Johansson, J. ; Goobar, A.; Kasliwal, M. M.; Helou, G.; Masci, F.; and 11 coauthors Monthly Notices of the Royal Astronomical Society, Vol. 466, 3442 (2017) SPIRITS: Uncovering Unusual Infrared Transients with Spitzer and 42 coauthors The Astrophysical Journal, Vol. 839, 88K (2017). SPIRITS 15c and SPIRITS 14buu: Two Obscured Supernovae in the Nearby Star-forming Galaxy IC 2163 Johansson, J. ; Contreras, C.; Castellón, S.; and 20 coauthors The Astrophysical Journal, Vol. 837, 167J (2017). Early observations of the nearby Type Ia supernova SN 2015F and 23 coauthors Monthly Notices of the Royal Astronomical Society, Vol. 464, 4476 (2017) Type Ibn Supernovae Show Photometric Homogeneity and Spectral Diversity at Maximum Light and 32 coauthors The Astrophysical Journal, Vol. 836, 158H (2017). Asphericity, Interaction, and Dust in the Type II-P/II-L Supernova 2013EJ in Messier 74 Johansson, Joel ; Hu, Maokai; Fox, Ori D.; and 4 coauthors The Astrophysical Journal, Vol. 834, 118M (2017). The superluminous transient ASASSN-15lh as a tidal disruption event from a Kerr black hole and 45 coauthors Nature Astronomy, Vol. 1, 2L (2016). A Systematic Study of Mid-infrared Emission from Core-collapse Supernovae with SPIRITS and 10 coauthors The Astrophysical Journal, Vol. 833, 231T (2016). High-redshift supernova rates measured with the gravitational telescope A 1689 Johansson, J. ; and 10 coauthors Astronomy & Astrophysics, Vol. 594, 54P (2016) Time-varying sodium absorption in the Type Ia supernova 2013gh Johansson, J. ; Vreeswijk, P. M.; and 16 coauthors Astronomy & Astrophysics, Vol. 592, 40F (2016) Absence of Fast-moving Iron in an Intermediate Type Ia Supernova between Normal and Super-Chandrasekhar Johansson, J. ; Nugent, P. E.; Goobar, A.; Nordin, J.; and 12 coauthors The Astrophysical Journal, Vol. 823, 147C (2016). Type II Supernova Energetics and Comparison of Light Curves to Shock-cooling Models and 35 coauthors The Astrophysical Journal, Vol. 820, 33R (2016). Flash Spectroscopy: Emission Lines from the Ionized Circumstellar Material around <10-day-old Type II Supernovae and 22 coauthors The Astrophysical Journal, Vol. 818, 3K (2016). An Excess of Mid-infrared Emission from the Type Iax SN 2014dt Johansson, J. ; Kasliwal, M. M.; Andrews, J. E.; Bally, J.; and 10 coauthors The Astrophysical Journal Letters, Vol. 816, 13F (2016). Diversity in extinction laws of Type Ia supernovae measured between 0.2 and 2 μm Johansson, J. ; Goobar, A.; Ferretti, R.; Papadogiannakis, S.; and 34 coauthors Monthly Notices of the Royal Astronomical Society, Vol. 453, 3300 (2015) The Needle in the 100 deg2 Haystack: Uncovering Afterglows of Fermi GRBs with the Palomar Transient Factory and 30 coauthors The Astrophysical Journal, Vol. 806, 52S (2015). Strong near-infrared carbon in the Type Ia supernova iPTF13ebh and 49 coauthors Astronomy & Astrophysics, Vol. 578, 9H (2015) A strong ultraviolet pulse from a newborn type Ia supernova and 17 coauthors Nature, Vol. 521, 328 (2015). No trace of a single-degenerate companion in late spectra of supernovae 2011fe and 2014J Johansson, J. ; and 7 coauthors Astronomy & Astrophysics, Vol. 577, 39L (2015) Supernova spectra below strong circumstellar interaction Johansson, J. ; Maeda, K.; Moriya, T. J.; and 7 coauthors Astronomy & Astrophysics, Vol. 574, 61L (2015) Early Observations and Analysis of the Type Ia SN 2014J in M82 and 21 coauthors The Astrophysical Journal, Vol. 798, 39M (2015). The Peculiar Extinction Law of SN 2014J Measured with the Hubble Space Telescope Johansson, J. ; Banerjee, D. P. K.; Venkataraman, V.; and 8 coauthors The Astrophysical Journal Letters, Vol. 788, 21A (2014). The Rise of SN 2014J in the Nearby Galaxy M82 Johansson, J. ; Amanullah, R.; Cao, Y.; Perley, D. A.; and 29 coauthors The Astrophysical Journal Letters, Vol. 784, 12G (2014). SN 2000cx and SN 2013bh: extremely rare, nearly twin Type Ia supernovae and 15 coauthors Monthly Notices of the Royal Astronomical Society, Vol. 436, 1225 (2013) Hunting for dark halo substructure using submilliarcsecond-scale observations of macrolensed radio jets and 6 coauthors Monthly Notices of the Royal Astronomical Society, Vol. 431, 2172 (2013) Herschel limits on far-infrared emission from circumstellar dust around three nearby Type Ia supernovae Johansson, J. ; Amanullah, R.; Goobar, A.;Monthly Notices of the Royal Astronomical Society Letters, Vol. 431, 43J (2013) Combined constraints on intergalactic dust from quasar colours and the soft X-ray background Johansson, J. ; and Mörtsell, E.;Monthly Notices of the Royal Astronomical Society, Vol. 426, 3360 (2012)
