  The Vela region has been observed for 1.7 Ms in November 2005 by the INTEGRAL
satellite. We present preliminary spectral and temporal results of Vela X-1, an
eclipsing neutron star hosted in a wind-accreting high-mass X-ray binary
system. Using data from ISGRI, SPI and JEM-X, we firmly confirm the existence
of cyclotron resonant scattering features (CRSF) at ~27 keV and ~54 keV,
implying a neutron-star magnetic field of ~3 10^12 Gauss, and the presence of
an iron emission line at ~6.5 keV. During two strong flares those parameters
remained unchanged. Furthermore we measure the neutron-star spin period of
283.6 s, indicating a still constant trend.
