Swift/XRT Deep Galactic Plane Survey Discovery of a New Intermediate Polar Cataclysmic Variable, Swift J183920.1-045350

Nicholas M. Gorgone, Patrick A. Woudt, David Buckley, Koji Mukai, Chryssa Kouveliotou, Daniela Huppenkothen, Ersin Göǧüş, Eric Bellm, Justin D. Linford, Alexander J. Van Der Horst, Matthew G. Baring, Dieter Hartmann, Paul Barrett, Bradley Cenko, Melissa Graham, Johnathan Granot, Fiona Harrison, Jamie Kennea, Brendan M. O'Connor, Stephen PotterDaniel Stern, Patrick Slane, Ralph Wijers

Research output: Contribution to journalArticlepeer-review


We report on the Swift/XRT Deep Galactic Plane Survey discovery and multiwavelength follow-up observations of a new intermediate polar (IP) cataclysmic variable, Swift J183920.1-045350. A 449.7 s spin period is found in XMM-Newton and NuSTAR data, accompanied by a 459.9 s optical period that is most likely the synodic, or beat period, produced from a 5.6 hr orbital period. The orbital period is seen with moderate significance in independent long-baseline optical photometry observations taken with the ZTF and SAAO telescopes. We find that the X-ray pulse fraction of the source decreases with increasing energy. The X-ray spectra are consistent with the presence of an Fe emission line complex with both local and interstellar absorption. In the optical spectra, strong Hα, H i, He i, and He ii emission lines are observed, all common features in magnetic CVs. The source properties are thus typical of known IPs, with the exception of its estimated distance of kpc, which is larger than typical, extending the reach of the CV population in our Galaxy.

Original languageEnglish
Article number243
JournalAstrophysical Journal
Issue number2
StatePublished - 20 Dec 2021

Bibliographical note

Publisher Copyright:
© 2021. The American Astronomical Society. All rights reserved.


Dive into the research topics of 'Swift/XRT Deep Galactic Plane Survey Discovery of a New Intermediate Polar Cataclysmic Variable, Swift J183920.1-045350'. Together they form a unique fingerprint.

Cite this