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Table 4.
Description of compatibility of progenitor scenarios with the current data using two estimates of extinction.
| Companion type | AV = 10.6 mag | AV = 15 mag |
|---|---|---|
| Main sequence companion | Allowed below M0 | Allowed below K5 |
| Stripped stars | Not allowed | |
| White dwarfs | Allowed | |
| Single star | Stars with > 30M⊙ exist in the neighborhood | |
| Disrupted binary | Allowed | |
| Pre-explosion merger | Allowed | |
| Neutron star | Allowed | |
| Black hole | Allowed | |
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