Table 1.
Sample of nearby (< 200 Mpc) SLSNe used in this study based on the curated list from Gomez et al. (2024) and Pessi et al. (2025).
| Name | Type | RA | Dec | Discovery date | z | Distance | Peak Mag | Peak date | Fermi-LAT TS |
|---|---|---|---|---|---|---|---|---|---|
| deg | deg | Mpc | MJD | ||||||
| SN 2017egm | I | 154.773 | 46.453 | 2017-05-23 | 0.0307 | 135 | −20.9 | 57926.4 | 25.7 |
| SN 2018bsz | I | 242.412 | −32.062 | 2018-05-09 | 0.0267 | 111 | −20.5 | 58267.5 | 0 |
| SN 2019ieh | I | 250.545 | 6.984 | 2019-06-23 | 0.032 | 140 | −19.4 | 58671.6 | 5.9 |
| SN 2020wnt | I | 56.658 | 43.229 | 2020-10-11 | 0.032 | 140 | −20.6 | 59213.7 | 0 |
| SN 2021adxl | II | 177.028 | −12.644 | 2021-11-03 | 0.018 | 79 | −20.2 | 59521.0 | 2.2 |
| SN 2022mma | II | 219.756 | 15.986 | 2022-06-10 | 0.038 | 167 | −20.4 | 59790.7 | 0 |
Notes. The peak absolute magnitude is given in the r band. The TS of a putative γ-ray signal was evaluated with a Fermi-LAT analysis at the SN optical position and integrated over the first year post-SN explosion assuming a spectral photon index of Γ = 2. See Sect. 3 for more details.
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