**Table 1:** Best fit parameters of EPIC spectrum models with their errors at the 90% confidence levels ( $\Delta \chi ^2=2.71$ ; corresponding to $\sigma =1.64$ for Gaussian statistics). For PN, MOS1, MOS2, the effective exposures after suppression of time intervals with high levels of flaring background are 33.2, 37.7, and 38.1 ks, and there are in the source extraction region 1264, 408, 408 counts, respectively ( $\sim$ $20\%$ of these counts come from the background).
			Temperature		Emission measure^a		6.4 keV Fe line^b					$L_{\rm X,intr.}$ ^a
Model	$N_{\rm H,22}$	Z	$T_{\rm soft}$	$T_{\rm hard}$	$EM_{\rm soft}^{\rm 54}$	$EM_{\rm hard}^{\rm 54}$	$N_{\rm ph,-7}$	EW	$\chi^2_\nu$ ( $\nu$ )^c		Q ^d	0.5-2.8/2.8-8/0.5-8
#	[cm^-2]	[ $Z_\odot$ ]	[keV]		[cm^-3]		[cm^-2 s^-1]	[eV]			[%]	$\log$ [erg s^-1]
1	$\rm 2.9_{-0.4}^{+0.5}$	$\rm0.8_{-0.3}^{+0.5}$		$\rm 3.0_{-0.6}^{+0.9}$		0.7 $\pm$ 0.1			1.11	(129)	19	30.8 30.5 31.0
2	4.1 $\pm$ 0.6	$\rm0.8_{-0.3}^{+0.4}$	0.9 $\pm$ 0.2	$\rm 4.3_{-1.3}^{+2.2}$	$\rm 1.2_{-0.6}^{+1.3}$	$\rm0.4_{-0.1}^{+0.2}$			0.97	(127)	56	31.4 30.5 31.5
3	4.1 $\pm$ 0.6	$\rm0.8_{-0.3}^{+0.4}$	0.9 $\pm$ 0.2	$\rm 4.2_{-1.3}^{+2.4}$	$\rm 1.3_{-0.6}^{+1.4}$	$\rm0.4_{-0.1}^{+0.2}$	$\rm 4.3_{-4.3}^{+4.5}$	109	0.96	(126)	60	31.4 30.5 31.5

^a EM and $L_{\rm X,intr.}$ were computed assuming 400 pc for the distance of V1647 Ori. The X-ray intrinsic luminosity was estimated from the fit of the PN data.
^b Energy and width fixed to 6.4 keV and 12 eV, respectively.
^c $\nu$ is the degree of freedom, and $\chi^2_\nu$ is the reduced Chi-square (i.e. the Chi-square divided by the degree of freedom).
^d The Q-value is the probability that one would observe the Chi-square value, or a larger value, if the assumed model is true, and the best-fit model parameters are the true parameter values.

Source LaTeX | All tables | In the text

	1 Introduction
	2 XMM-Newton observations and data reduction
	3 Variability and quantile analysis
	4 Spectral analysis
	5 Comparison of V1647 Ori X-ray fluxes observed with Chandra and XMM-Newton
	6 Discussion
	References