  We have reanalyzed the 260 ksec XMM-Newton observation of 1E1207.4-5209.
There are several significant improvements over previous work. Firstly, a much
broader range of physically plausible spectral models was used. Secondly, we
have utilized a more rigorous statistical analysis. The standard F-distribution
was not employed, but rather the exact finite statistics F-distribution was
determined by Monte-Carlo simulations. This approach was motivated by the
recent work of Protassov et al. (2002) and Freeman et al. (1999). They
demonstrated that the standard F-distribution is not even asymptotically
correct when applied to assess the signficance of additional absorption
features in a spectrum. With our improved analysis we do not find a third and
fourth spectral feature (Bignami et al. (2003), De Luca et al. (2004)) in
1E1207.4-5209, but only the two broad absorption features previously reported
(Sanwal et al. (2002), Hailey and Mori (2002)). Two additional statistical
tests, one line model dependent and the other line model independent confirmed
our modified F-test analysis. For all physically plausible continuum models
where the weak residuals are strong enough to fit, the residuals occur at the
instrument Au-M edge. As a sanity check we confirmed that the residuals are
consistent in strength and position with the instrument Au-M residuals observed
in 3C273.
