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Observing Orbital Motion in Strongly Curved Spacetime

Join Gabriel Török from the Institute of Physics, Silesian University in Opava on an exploration of orbital motion in curved spacetime. Discover the synergy between theory and observation to unveil the secrets of accretion disks and variability in GRS 1915+105. Collaborate with experts like Pavel Bakala and Didier Barret to compare QPO models and response matrices from RXTE and LOFT. Learn about the power of small and elongated spots in understanding the dynamics close to the Innermost Stable Circular Orbit (ISCO). Explore the potential of the LOFT mission in revealing intricate orbital details and harmonic content, aiding in the distinction between proposed physical models.

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Observing Orbital Motion in Strongly Curved Spacetime

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  1. Observing Orbital Motion in StronglyCurvedSpacetime Gabriel Török Institute ofPhysics, Silesian University in Opava CZ.1.07/2.3.00/20.0071Synergy , GAČR 209/12/P740, 202/09/0772,SGS-01-2013, www.physics.cz

  2. Observing Orbital Motion in StronglyCurvedSpacetime : Gabriel Török Institute ofPhysics, Silesian University in Opava CZ.1.07/2.3.00/20.0071Synergy , GAČR 209/12/P740, 202/09/0772,SGS-01-2010, www.physics.cz

  3. Timingsignaturesofaccretiondiscinhomogeneities Gabriel Török Institute ofPhysics, Silesian University in Opava CZ.1.07/2.3.00/20.0071Synergy , GAČR 209/12/P740, 202/09/0772,SGS-01-2013, www.physics.cz

  4. COLLABORATION: Pavel Bakala, Didier Barret, Vladimír Karas, Michal Dovčiak, Martin Wildner, Dalibor Wzientek, Marek Abramowicz, Luigi Stella, Eva Šrámková, Kateřina Goluchová, Frederic Vincent, Grzegorz Mazur, Tomáš Pecháček

  5. Comparing different orbital QPO models, RXTE and LOFT Response Matrices (Detector) Global Empirical Model of Variability and Spectra (GRS 1915+105, SPL State) TOTAL SOURCE FLUX MODEL + “DATA” Time and Spectral Distribution of Detected Counts RESULTS QPO MODEL TIMING ANALYSIS

  6. I. Small spots moving along slightly eccentric orbits close ISCO

  7. I. Small spots moving along slightly eccentric orbits close ISCO POWER POWER Left: RXTE Right: LOFT

  8. II. Toymodelsof double peakQPOsassumingpreferredorbits

  9. II. Toymodelsof double peakQPOsassumingpreferredorbits POWER Left: RXTE Right: LOFT

  10. III. Elongatedspotswith LOFT [LOFT YELLOW BOOK]

  11. CONCLUSIONS Ad SMALL SPOTS: The LOFT observationscouldeasily reveal the Keplerian frequency together with its firstand second harmonics when the strongest (but still veryweak) single signal is around the limits of the RXTE detectability. Ad ELONGATED SPOTS: The LOFT missioncould open a window to observetheepicyclicmotion. Ad SPOT vs. TORUS COMPARISON: We conclude that the abilityto recognize the harmonic content of the signal andfollowthe QPO evolutioncan help to distinguish between thedifferentproposedphysicalmodels.

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