We present first results of simultaneous observations
of the high mass X-ray binary Cygnus X-1 for 50 ks
with XMM-Newton, Chandra-HETGS, RXTE,
Suzaku, INTEGRAL, and Swift in 2008 April.
The observations are performed close to phase 0 of the 5.6 d orbit
when pronounced dips in the X-ray emission from the black hole are known to occur.
The dips are due to highly variable absorption in the focused wind from the O-star companion to the black hole.
Compared to previous high resolution spectroscopy studies of the dip and non-dip emission
with Chandraa
the addition of XMM EPIC-pn and Suzaku-XIS data
allows for a better determination of the continuum through the broad iron line region,
while RXTE and INTEGRAL constrain the >10 keV continuum.