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17 April 2024 |
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Canonical Timing and Spectral Behavior of LMC X-3 in the Low/Hard State | Patricia T. Boyd
; Alan P. Smale
; Jeroen Homan
; Peter G. Jonker
; Michiel van der Klis & Erik Kuulkers
; | Date: |
3 Sep 2000 | Subject: | astro-ph | Affiliation: | NASA/GSFC), Jeroen Homan, Peter G. Jonker, Michiel van der Klis (Univ. Amsterdam, CHEAF) & Erik Kuulkers (SRON, Univ. Utrecht | Abstract: | We present results from three observations with the Rossi X-ray Timing Explorer (RXTE) of LMC X-3, obtained while the source was in an extended ’low/hard’ state. The data reveal a hard X-ray spectrum which is well fit by a pure power law with photon index Gamma=1.69+/-0.02, with a source luminosity at 50 kpc of 5-16x10^{36}erg/s (2--10 keV). Strong broad-band (0.01-100 Hz) time variability is also observed, with fractional rms amplitude 40+/-4%, plus a quasi-periodic oscillation (QPO) peak at 0.46+/-0.02 Hz with rms amplitude ~14%. This is the first reported observation in which the full canonical low/hard state behavior (pure hard power law spectrum combined with strong broad-band noise and QPO) for LMC X-3 is seen. We reanalyze several archival RXTE observations of LMC X-3 and derive consistent spectral and timing parameters, and determine the overall luminosity variation between high/soft and low/hard states. The timing and spectral properties of LMC X-3 during the recurrent low/hard states are quantitatively similar to that typically seen in the Galactic black hole candidates. | Source: | arXiv, astro-ph/0009036 | Services: | Forum | Review | PDF | Favorites |
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