X-Ray Absorption Analysis of NGC3516: Appearance of Fast Components with
  Increased Source Flux
  By analyzing the X-ray spectra of NGC 3516 from 2001 and 2006 obtained with
the HETGS spectrometer on board the Chandra observatory, we find that the
kinematic structure of the outflow can be well represented by four outflow
components intrinsic to NGC 3516. The outflow velocities of the different
components are 350 +-100 km s-1, 1500 +-150 km s-1, 2600 +-200 km s-1 and 4000
+-400 km s-1 for components 1, 2, 3 and 4, respectively. A local component at z
= 0 could be confused with intrinsic component 3. Components 1 and 2 have a
broad range of ionization manifested by absorption from 23 different charge
states of Fe. Component 3 and 4 are more highly ionized and show absorption
from only 9 different charge states of Fe, however we were able to reconstruct
the absorption measure distribution (AMD) for all four. The total column
density of each component is NH = (1.8+- 0.5) X10^22 cm-2, NH = (2.5+- 0.3)
X10^22 cm-2, NH = (6.9+- 4.3) X10^22 cm-2 and NH = (5.4+- 1.2) X10^22 cm-2,
respectively. The fast components 3 and 4 appear only in the high state of 2006
and not in 2001, while the slower components persist during both epochs. On the
other hand, there is no significant absorption variability within days during
2001 or during 2006. We find that covering factor plays a minor role for the
line absorption.
