A systematic periodicity and time-variable modulation search in RXTE ASM data : methods, findings, and implications for astrophysical X-ray sources
Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Physics, 2007. === Includes bibliographical references (p. 99-106). === In this work, we present the results of a general search for periodicities and for time-variable modulation strength in X-ray sources using data from the All-Sky Mon...
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| Format: | Others |
| Language: | English |
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Massachusetts Institute of Technology
2008
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| Online Access: | http://hdl.handle.net/1721.1/40898 |
| Summary: | Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Physics, 2007. === Includes bibliographical references (p. 99-106). === In this work, we present the results of a general search for periodicities and for time-variable modulation strength in X-ray sources using data from the All-Sky Monitor onboard the Rossi X-ray Timing Explorer. New findings, including a sharp increase in the modulation of the X-ray flux from the Galactic bulge low-mass X-ray binary GX 9+9 and the recent spin-down event of the pulsar in the high-mass X-ray binary X0114+650, are reported. These searches employed new methods of periodicity detection that employed an algorithm to reduce the effects of low frequency noise from X-ray sources. We discuss these methods and show how they can be used to enhance the signal-to-noise ratio in the Fourier domain for many sources. === by Robert J. Harris. === S.B. |
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