Orbital Parameters and phase resolved Spectroscopy of 4U 0115+634

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INTEGRAL 2010_116.pdf (201.96 KB)

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https://pos.sissa.it/115/116/

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https://doi.org/10.22323/1.115.0116
 http://hdl.handle.net/11603/29926

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UMBC Center for Space Sciences and Technology (CSST) / Center for Research and Exploration in Space Sciences & Technology II (CRSST II)
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https://orcid.org/0000-0002-4656-6881

Date

2011-11-16

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conference papers and proceedings
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Citation of Original Publication

Mueller, Sebastian, Maria Obst, Ingo Kreykenbohm, Felix Fuerst, Matthias Kühnel, Joern Wilms, Dmitry Klochkov, et al. “Orbital Parameters and Phase Resolved Spectroscopy of 4U 0115+634.” In Proceedings of 8th INTEGRAL Workshop “The Restless Gamma-Ray Universe” — PoS(INTEGRAL 2010), 115:116. SISSA Medialab, 2011. https://doi.org/10.22323/1.115.0116.

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Abstract

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.