Investigating active galaxy IRAS 05078+1626 through spectral analysis of two x-ray observations

Abstract

A spectral analysis was performed on two X-ray observations separated by six years, of the Seyfert 1.5 galaxy IRAS 05078+1626. The first observation was taken in 2007 with XMM-Newton and the second in 2013 with Suzaku. The two epochs allow us to examine the effects of variability. Empirical models were used to examine variation prior to applying physical models to the broadband spectra. The physical models included the warm corona and blurred reflection interpretations. Statistics from the models showed the warm corona to be the best, however, the blurred reflection had a more reasonable physical interpretation. A third case was briefly analyzed using the Rexcor grids. This model combines the warm corona and blurred reflection components. The statistics from this were improved from the other physical models. Earlier work on the XMM data alone predicted high levels of absorption and a truncated inner disc. Overall, our analysis shows that the extreme behaviour claimed in previous work is not required.