Table 2.
Realized best estimates of eight free parameters used in fitting the hybrid Ni+CSM model to the multi-band lightcurve of SN 2020bqj with MOSF IT, and three derived parameters.
| Parameter | Unit | Prior range | Realization |
|
|---|---|---|---|---|
| s = 0 | s = 2 | |||
| Nickel fraction (fNi) | % | 0.1−100 |
 |
 |
| CSM opacity (κCSM) | cm2 g−1 | 0.1−0.34 |
 |
 |
| Kinetic energy (Ekin) | 1051 erg | 0.01−20 |
 |
 |
| CSM mass (MCSM) | M⊙ | 0.01−20 |
 |
 |
| Ejecta mass (Mej) | M⊙ | 1−40 |
 |
 |
| CSM inner radius (R0) | AU | 0.001−10 |
 |
 |
| CSM density (log10ρCSM) | g cm−3 | −13 to −6 |
 |
 |
| Explosion epoch (t0) | days | −500 to 0 |
 |
 |
| Nickel mass (MNi = fNi × Mej) | M⊙ | − |
 |
 |
Ejecta velocity ( ) |
km s−1 | − |
 |
 |
Notes. We considered the Ni+CSM shell model (s = 0) with a constant CSM density profile, and the wind (s = 2) model, with the CSM density dropping off as 1/r2. The explosion epoch t0 (in the observer frame) is relative to our adopted explosion epoch. The listed uncertainties correspond to the 68% confidence intervals in the posterior distributions (see the appendix for the associated corner plots) and do not account for systematic uncertainties in the description of the data by the (simplified) models.
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