**Table 3:** Swift XRT spectral fits. Quoted errors are 90% confidence on 1 interesting parameter.
	GRB050126	GRB050219a
	Model 1: $wa*po^{\dagger}$ - all^a
Mode	PC only	WT+PC+LrPD
gal $N_{\rm H}$	$5.3\times10^{20}$	$8.5\times10^{20}$
$\Gamma$	$\rm 2.26^{+0.26}_{-0.25}$	$\rm 1.90^{+0.17}_{-0.16}$
$N_{\rm excess}$	-	$1.34^{+0.51}_{-0.47}\times10^{21}$
$\chi^{2}_{\nu}$ / d.o.f.	8.2/8	55/52
	Model 2: $wa*po^{\dagger}$ - all tied^b
Mode	PC only	WT only
gal $N_{\rm H}$	$5.3\times10^{20}$	$8.5\times10^{20}$
$\Gamma$	$\rm 2.42^{+0.33}_{-0.31}$	$\rm 1.97^{+0.17}_{-0.16}$
$N_{\rm excess}$	-	$1.53^{+0.52}_{-0.49}\times10^{21}$
$\chi^{2}_{\nu}$ / d.o.f.	8.6/6	66/49
	Model 3: $wa*po^{\dagger}$ - untied^c
Mode	PC only	WT only
gal $N_{\rm H}$	$5.3\times10^{20}$	$8.5\times10^{20}$
$\Gamma_{\rm pre}$	$\rm 2.59^{+0.38}_{-0.35}$	$\rm 1.98^{+0.18}_{-0.16}$
$\Gamma_{\rm post}$	$\rm 1.72^{+0.65}_{-0.60}$	$\rm 1.89^{+0.26}_{-0.23}$
$N_{\rm excess}$	-	$1.49^{+0.53}_{-0.48}\times10^{21}$
$\chi^{2}_{\nu}$	5.0/5	66/48

$\dagger$ Here we use the standard XSPEC notation where wa*pomeans absorbed powerlaw.
^a all - simultaneous fit to all data; ^b all tied - simultaneous fit to pre- and post-break spectra with the photon index in each part of the spectrum tied together; ^c untied - simultaneous fit to pre- and post-break spectra allowing $\Gamma$ and $N_{\rm excess}$ where applicable to freely vary between the pre- and post-break data.

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