TY - JOUR
T1 - Identification of 1RXS J165424.6-433758 as a Polar Cataclysmic Variable
AU - O’Connor, B.
AU - Brink, J.
AU - Buckley, D. A.H.
AU - Mukai, K.
AU - Kouveliotou, C.
AU - Göğüş, E.
AU - Potter, S. B.
AU - Woudt, P.
AU - Lien, A.
AU - Levan, A.
AU - Kargaltsev, O.
AU - Baring, M. G.
AU - Bellm, E.
AU - Cenko, S. B.
AU - Evans, P. A.
AU - Granot, J.
AU - Hailey, C.
AU - Harrison, F.
AU - Hartmann, D.
AU - van der Horst, A. J.
AU - Huppenkothen, D.
AU - Kaper, L.
AU - Kennea, J. A.
AU - Slane, P. O.
AU - Stern, D.
AU - Troja, E.
AU - Wijers, R. A.M.J.
AU - Younes, G.
N1 - Publisher Copyright:
© 2023. The Author(s). Published by the American Astronomical Society.
PY - 2023/11/1
Y1 - 2023/11/1
N2 - 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 λ4640 Bowen blend, almost a dozen He i lines, and He ii λ4541, λ4686, and λ5411. 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.
AB - 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 λ4640 Bowen blend, almost a dozen He i lines, and He ii λ4541, λ4686, and λ5411. 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.
UR - https://www.scopus.com/pages/publications/85176946826
U2 - 10.3847/1538-4357/acf831
DO - 10.3847/1538-4357/acf831
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AN - SCOPUS:85176946826
SN - 0004-637X
VL - 957
JO - Astrophysical Journal
JF - Astrophysical Journal
IS - 2
M1 - 89
ER -