Discovery of the magnetic cataclysmic variable XMM J152737.4-205305.9 with a deep eclipse-like feature

Abstract

In this study, we report a discovery from XMM-Newton, which involves the identification and subsequent examination of a newly discovered polar-type cataclysmic variable named XMM J152737.4-205305.9. The discovery was made by matching the XMM-Newton data archive with the cataclysmic variable candidate catalog provided by Gaia Data Release 3. The utilization of X-ray photometry has led to the identification of two distinct dips that exhibit a recurring pattern with a precise period of 112.4(1) minutes in two XMM-Newton observations that are one year apart. The data obtained from the photometry of Zwicky Transient Facility (ZTF) and ATLAS surveys consistently indicate the presence of the different mass accretion states of up to 2 mag. Following the optical data, the \textit{SRG}(Spectrum Roentgen Gamma)/eROSITA All Sky Survey observed the system in two different X-ray levels which may imply different accretion states. Following these observations, the low-resolution spectrum obtained using SALT spectroscopy exposes the prominent hydrogen Balmer and helium emission lines, strongly supporting that the system belongs to the category of polar-type magnetic cataclysmic variable. The XMM-Newton observations, conducted under various conditions of X-ray levels, reveal a consistent pattern of a deep dip-like feature with a width of $\approx 9.1$ min. This feature implies the presence of an eclipse in both observations. According to Gaia data, the object is located at a distance of $1156_{-339}^{+720}$,pc, and its X-ray luminosity lies within the $L_{\mathrm{X}}$= (3-6)$\times 10^{31}$ \lergs range.

11 pages, 13 figures, 21 March 2024, accepted to Astronomy & Astrophysics

References in corpus (19)

• HI4PI: A full-sky HI survey based on EBHIS and GASS
• The Zwicky Transient Facility: Data Processing, Products, and Archive
• The eROSITA X-ray telescope on SRG
• The SRG X-ray orbital observatory, its telescopes and first scientific results
• The XMM-Newton serendipitous survey IX. The fourth XMM-Newton serendipitous source catalogue
• The eROSITA Final Equatorial Depth Survey (eFEDS): The X-ray catalog
• The Automatic Learning for the Rapid Classification of Events (ALeRCE) Alert Broker
• On the evolutionary status of short period cataclysmic variables
• Gaia Data Release 3: All-sky classification of 12.4 million variable sources into 25 classes
• One thousand cataclysmic variables from the Catalina Real-time Transient Survey
• Hunting high and low: XMM monitoring of the eclipsing polar HU Aquarii
• High and low states of the system AM Herculis
• A Trip to the Cataclysmic Binary Zoo: Detailed Follow-Up of 35 Recently-Discovered Systems
• The serendipituous discovery of a short-period eclipsing polar in 2XMMp
• 2XMMi J225036.9+573154 - a new eclipsing AM Her binary discovered using XMM-Newton
• Multi-epoch time-resolved photometry of the eclipsing polar CSS081231:J071126+440405
• The changing accretion states of the intermediate polar MU Camelopardalis
• The various accretion modes of AM Herculis: Clues from multi-wavelength observations in high accretion states
• Discovery of eRASSt J192932.9-560346: a bright, two-pole accreting, eclipsing polar