  We report the discovery of strong soft X-ray emission lines and a hard
continuum above 2 keV in the Narrow-Line Seyfert 1 galaxy Mrk 335 during an
extremely low X-ray flux state. Mrk 335 was observed for 22 ks by XMM-Newton in
July 2007 as a Target of Opportunity to examine it in its X-ray low-flux state,
which was discovered with Swift. Long-term light curves suggest that this is
the lowest flux state this AGN has ever been seen in. However, Mrk 335 is still
sufficiently bright that its X-ray properties can be studied in detail. The
X-ray continuum spectrum is very complex and requires several components to
model. Statistically, partial covering and blurred reflection models work well.
We confirm the presence of a strong narrow Fe line at 6.4 keV. High-resolution
spectroscopy with the XMM-RGS reveals strong, soft X-ray emission lines not
detected in previous, higher signal-to-noise, XMM-Newton observations, such as:
highly ionized Fe lines, O VII, Ne IX and Mg XI lines. The optical/UV fluxes
are similar to those previously measured with Swift. Optical spectroscopy taken
in 2007 September do not show any changes to optical spectra obtained 8 years
earlier.
