出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：We report on an outburst of the high mass X-ray binary 4U 0115+63 with a pulse period of 3.6 s in spring 2008 as observed with INTEGRAL and RXTE. By analyzing the lightcurves we derive an updated orbital- and pulse period ephemeris of the neutron star. We also study the pulse profile variations as a function of time and energy as well as the variability of the spectral parameters. We find clear evidence for at least three cyclotron line features. In agreement with previous observations of 4U 0115+63, we detect an anti-correlation between the luminosity and the fundamental cyclotron line energy.
