Table 3: Fitting parameters for different components for the SN 1993J XMM-Newton data.
  Models
Parameters Solar HHe-Zone HeN-Zone SN 87A-like
    (s15s7) (s15s7)  
$\chi^2$/ d.o.f. 2.13 1.98 1.26 1.67
2*Rad. Comp Temp (keV) $0.68\pm0.08$ $0.71\pm0.08$ $1.02\pm0.41$ $0.75\pm0.11$
  Norm (10-3) $5.79\pm0.11$ $6.53\pm0.83$ $6.20\pm0.23$ $5.10\pm0.73$
2*Ad. Comp Temp (keV) $1.33\pm0.24$ $1.37\pm0.03$ $2.07\pm0.16$ $1.35\pm0.03$
  Norm (105) $2.08\pm0.04$ $1.81\pm0.05$ $0.28\pm0.02$ $1.58\pm0.03$
Unabsorbed flux * Rad. Comp $1.12\pm0.02$ $1.24\pm 0.15$ $1.64\pm 0.6$ $1.14\pm 0.16$
10-13 erg s-1 Ad. Comp $1.72\pm 0.03$ $1.59\pm 0.04$ $1.45\pm 0.10$ $1.73\pm 0.03$
  Total flux $2.84\pm 0.05$ $2.84\pm 0.19$ $3.09\pm 0.16$ $2.87\pm 0.19$
$n_{{\rm H}}$(cool shell) in 1020 cm-2 $13.2\pm1.40$ $11.8\pm0.96$ $0.07\pm0.07$ $6.5\pm1.1$
Flux (Reverse Shock) ** Rad. Comp $2.49\pm0.05$ $2.46\pm 0.31$ $2.73\pm 0.10$ $2.18\pm 0.31$
10-13 erg s-1 Ad. Comp $2.60\pm0.05$ $2.92\pm 0.08$ $1.89\pm 0.14$ $2.46\pm 0.05$
  Total flux $5.09\pm0.10$ $5.38\pm 0.39$ $4.62\pm 0.24$ $4.66\pm 0.36$

* Corrected for the Galactic extinction column density, $n_{{\rm H}}$ = $4.17\times10^{20}$ cm-2
** The total flux from the reverse shock before absorption by the cool shell.


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