First XMM-Newton study of two Narrow-Line Seyfert 1 galaxies discovered   in the Sloan Digital Sky Survey
  The Early Data Release of the Sloan Digital Sky Survey (SDSS) contains 150 Narrow-Line Seyfert 1 (NLS1) galaxies, most of them previously unknown. We present here the study of the X-ray emission from two of these active galaxies (SDSS J030639.57+000343.2 and SDSS J141519.50-003021.6), based upon XMM-Newton observations. The spectral and timing characteristics of the two sources are presented and compared against the typical properties of known NLS1 galaxies. We found that these two NLS1 are within the dispersion range of the typical values of this class of AGN, although with some interesting features that deserve further studies. 
L. Foschini, V. Braito, G.G.C. Palumbo, G. Ponti, M. Dadina, R. Della   Ceca, G. Di Cocco, P. Grandi, G. Malaguti