A search for cyclotron resonance features with INTEGRAL
Abstract
We present an INTEGRAL observation of the Cen-Crux region in order to search the electron cyclotron resonance scattering features from the X-ray binary pulsars. During the AO1 200ks observation, we clearly detected 4 bright X-ray binaries, 1 Seyfert Galaxy, and 4 new sources in the field of view. Especially from GX301-2, the cyclotron resonance feature is detected at about 37 keV, and width of 3--4 keV. In addition, the depth of the resonance feature strongly depends on the X-ray luminosity. This is the first detection of luminosity dependence of the resonance depth. The cyclotron resonance feature is marginally detected from 1E1145.1-6141. Cen X-3 was very dim during the observation and poor statistics disable us to detect the resonance features.These are first INTEGRAL results of searching for the cyclotron resonance feature.
Cite
@article{arxiv.astro-ph/0406449,
title = {A search for cyclotron resonance features with INTEGRAL},
author = {Y. Okada and H. Niko and M. Kokubun and K. Makishima and M. Nakajima and T. Mihara and Y. Terada and F. Nagase and Y. Tanaka},
journal= {arXiv preprint arXiv:astro-ph/0406449},
year = {2007}
}
Comments
4pages, 8figures, To be published in the Proceedings of the 5th INTEGRAL Workshop: "The INTEGRAL Universe", February 16-20, 2004, Munich