3 papers
astro-ph2002
Confirmation of Two Cyclotron Lines in Vela X-1
I. Kreykenbohm, W. Coburn, J. Wilms +4
We present pulse phase-resolved X-ray spectra of the high mass X-ray binary Vela X-1 using the Rossi X-ray Timing Explorer. We observed Vela X-1 in 1998 and 2000 with a total obser…
astro-ph2000
Temporal Evolution of X-ray Lags in Cygnus X-1
K. Pottschmidt, J. Wilms, M. A. Nowak +3
We present the long term evolution of the frequency-dependent X-ray time lags of the black hole candidate Cygnus X-1 as measured in 1996 and 1998 with the Rossi X-ray Timing Explor…
astro-ph1998
Vela X-1 as seen by RXTE
I. Kreykenbohm, P. Kretschmar, J. Wilms +5
We present results from four observations of the accreting X-ray pulsar Vela X-1 with RXTE in 1996 February. The light curves show strong pulse to pulse variations, while the avera…