Polarized QPOs from theINTEGRALpolar IGRJ14536-5522 (=Swift J1453.4-5524)
| Autor: | Piet Fourie, James O'Connor, Darragh O'Donoghue, Andrew Norton, Encarni Romero-Colmenero, Koji Mukai, Lisa A. Crause, S. B. Potter, Martin Still, Geoff Evans, David A. H. Buckley, Oliver Butters, Craig Sass |
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| Rok vydání: | 2010 |
| Předmět: |
High Energy Astrophysical Phenomena (astro-ph.HE)
Physics Swift Polarimetry FOS: Physical sciences Astronomy and Astrophysics Astrophysics Orbital period Photometry (optics) Astrophysics - Solar and Stellar Astrophysics Space and Planetary Science Polar Astrophysics - High Energy Astrophysical Phenomena Spectroscopy computer Solar and Stellar Astrophysics (astro-ph.SR) computer.programming_language |
| Zdroj: | Monthly Notices of the Royal Astronomical Society. 402:1161-1170 |
| ISSN: | 1365-2966 0035-8711 |
| DOI: | 10.1111/j.1365-2966.2009.15944.x |
| Popis: | We report optical spectroscopy and high speed photometry and polarimetry of the INTEGRAL source IGRJ14536-5522 (=Swift J1453.4-5524). The photometry, polarimetry and spectroscopy are modulated on an orbital period of 3.1564(1) hours. Orbital circularly polarized modulations are seen from 0 to -18 per cent, unambiguously identifying IGRJ14536-5522 as a polar. Some of the high speed photometric data show modulations that are consistent with quasi-periodic oscillations (QPOs) on the order of 5-6 minutes. Furthermore, for the first time, we detect the (5-6) minute QPOs in the circular polarimetry. We discuss the possible origins of these QPOs. We also include details of HIPPO, a new high-speed photo-polarimeter used for some of our observations. Comment: Accepted for publication by MNRAS. The paper contains 7 figures and 1 table |
| Databáze: | OpenAIRE |
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