Table 2: Spectral parameters inferred from fitting the Chandra ACIS-S data obtained from PSR B1929+10 and its associated extended feature.
Modela $\chi^{2}_{\nu}$ d.o.f. $N_{\rm H}$ $\Gamma^{b}$/kT Normalization at 1 keVc Radiusd
      1021 cm-2   photons keV-1 cm-2 s-1 m
PSR B1929+10
PL 0.89 36 $\rm 2.40^{+0.36}_{-0.34}$ $\rm 2.91^{+0.16}_{-0.13}$ $8.12^{+1.04}_{-0.90}\times10^{-5}$ -
BB 2.00 36 <0.04 $\rm0.36^{+0.01}_{-0.01}$ - $\rm 29^{+2}_{-2}$
PL+BB 0.93 34 $\rm 1.40^{+1.09}_{-l.40}$ $\rm 2.48^{+0.52}_{-1.09}/0.29^{+0.05}_{-0.29}$ $4.60^{+6.29}_{-3.42}\times10^{-5}$ $\rm 25.81^{+18.34}_{-25.81}$
PL+BB 0.92 35 $\rm 2.44^{+0.60}_{-0.39}$ $\rm 2.91^{+0.16}_{-0.16}/0.07^{+0.03}_{-0.07}$ $8.17^{+1.09}_{-0.94}\times10^{-5}$ 300
PL+BB 0.90 35 $\rm 2.72^{+1.06}_{-0.55}$ $\rm 2.97^{+0.27}_{-0.17}/0.05^{+0.01}_{-0.05}$ $8.67^{+2.25}_{-1.22}\times10^{-5}$ 10000
BB+BB 0.91 34 <0.70 $\rm0.71^{+0.21}_{-0.13}/0.27^{+0.03}_{-0.05}$ - $\rm 5.37^{+3.43}_{-2.30}/42.32^{+22.74}_{-4.47}$
Arc-like feature
PL 0.88 6 2.40 $\rm 2.00^{+0.32}_{-0.30}$ $3.63^{+0.78}_{-0.74}\times10^{-6}$ -
a PL = power-law; BB = blackbody; b the entry in this column depends on the model in interest. It is the temperature kT in keV or the photon index $\Gamma$; c the normalization constant for the power-law model.; d the radius of the blackbody emitting area is calculate for an assumed pulsar distance of 361 pc.


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