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Table 2.

Parameters and priors used in our MOSFiT fits.

Parameter Range Distribution

Common parameters

nH, host [1016:2 × 1021] cm−2 Log-uniform
texpl [−500:0] d Uniform
Tmin [1000:50 000] K Log-uniform
Mej [0.1:100] M Log-uniform
vej [6000:12 000] km s−1 Uniform

56Ni model

fNi [10−3:1.0] Log-uniform
κ [0.05:0.2] cm2 g−1 Uniform
κγ [0.1:104] cm2 g−1 Log-uniform

Magnetar model

κ [0.05:0.2] cm2 g−1 Uniform
κγ [0.1:104] cm2 g−1 Log-uniform
Pspin [1:50] ms Uniform
B [0.1:50]×1014 G Log-uniform
MNS [1.0:2.5] M Uniform
θPB [0:π/2] rad Uniform

CSI model

n 7 Fixed
δ 1 Fixed
s 0 or 2 Fixed
R0 [0.1:1000] AU Log-uniform
MCSM [0.1:100] M Log-uniform
ρ [10−15:10−6] cm−3 Log-uniform

Fallback model

κ [0.05:0.2] cm2 g−1 Uniform
ttr [10−4:100] d Log-uniform
L1 [1050:1057] erg s−1 Log-uniform

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