RXTE Studies of Cyclotron Lines in Accreting Pulsars
W.A. Heindl, W. Coburn, D.E. Gruber, M.R. Pelling, R.E. Rothschild
P. Kretschmar, I. Kreykenbohm, J. Wilms, K. Pottschmidt, R. Staubert
Observations of accreting X-ray pulsars with the RXTE have revealed
new cyclotron resonance scattering features (CRSFs) in Cen X-3,
4U 1626-67, and 4U 0115+63. In addition, the known CRSFs in Her X-1,
Vela X-1, 4U 1538-52, and 4U 1907+09 have been studied. We report the
observed line properties including energies, widths, depths, and
behavior with pulse phase. With seven objects observed in detail, some
class generalizations, for example line width versus energy, might be
reasonably secure. Furthermore, models of the polar cap emitting
region can now be tested against observed CRSFs under a variety of
File translated from TEX by TTH, version 2.32.
On 16 Jul 1999, 09:19.