| Autor: |
O'Connor, B., Brink, J., Buckley, D. A. H., Mukai, K., Kouveliotou, C., Göğüş, E., Potter, S. B., Woudt, P., Lien, A., Levan, A., Kargaltsev, O., Baring, M. G., Bellm, E., Cenko, S. B., Evans, P. A., Granot, J., Hailey, C., Harrison, F., Hartmann, D., van der Horst, A. J. |
| Předmět: |
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| Zdroj: |
Astrophysical Journal; 11/10/2023, Vol. 957 Issue 2, p1-16, 16p |
| Abstrakt: |
We present the results of our X-ray, ultraviolet, and optical follow-up campaigns of 1RXS J165424.6-433758, an X-ray source detected with the Swift Deep Galactic Plane Survey. The source X-ray spectrum (Swift and NuSTAR) is described by thermal bremsstrahlung radiation with a temperature of kT = 10.1 ± 1.2 keV, yielding an X-ray (0.3–10 keV8) luminosity L X = (6.5 ± 0.8) × 1031 erg s−1 at a Gaia distance of 460 pc. Spectroscopy with the Southern African Large Telescope revealed a flat continuum dominated by emission features, demonstrating an inverse Balmer decrement, the λ 4640 Bowen blend, almost a dozen He i lines, and He ii λ 4541, λ 4686, and λ 5411. Our high-speed photometry demonstrates a preponderance of flickering and flaring episodes, and revealed the orbital period of the system, P orb = 2.87 hr, which fell well within the cataclysmic variable (CV) period gap between 2 and 3 hr. These features classify 1RXS J165424.6-433758 as a nearby polar magnetic CV. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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