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Table 11.

Summary of the PISN tests applied on SN 2018ibb.

Test Condition Observation Section Pass Reference
Light curve

Rise time 120–150 days > 93 days 4.2 ? (1, 2)
Decline rate 1 mag (100 days)−1 1.1 mag (100 days)−1 4.2 (1, 2)
Peak absolute magnitude Mbol −20 to −22.5 mag <  − 21.8 mag 4.2 (1, 2)
Nickel mass 10–40 M 25–40 M 5.2.1, 5.2.2, 5.2.3 (1, 2)
PISN template He100–He130, He120–He130, 5.2.3 (1, 2, 3)
P200–P250 P250, P250Ni34

Spectra

Photospheric velocity 7000–11 000 km s−1 8500 km s−1 4.3.2 (3, 4)
Photospheric velocity evolution Flat Flat 5.3 Here
Nebular spectra He100, He130 He130, but blue excess 5.2.4 (5)
[Co II] λ 1.025 μm Not predicted Detected 5.2.5 (5)

Contribution from CSM interaction to the light curve and spectra

CSM interaction Not explored Observed 5.1, 4.3.4, 5.2.4 ?

Host galaxy

Metallicity < Z/3 4.6 (6)

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