Einstein Probe detects an X-ray flare from nearby star

Using the Einstein Probe (EP), astronomers have detected a new X-ray transient event, which turned out to be an X-ray flare from the star PM J23221-0301 located about 150 light years away. The finding was reported in a research paper published December 18 on the arXiv preprint server.

Einstein Probe detects an X-ray flare from nearby star

Using the Einstein Probe (EP), astronomers have detected a new X-ray transient event, which turned out to be an X-ray flare from the star PM J23221-0301 located about 150 light years away. The finding was reported in a research paper published December 18 on the arXiv preprint server.

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Einstein Probe discovery of EP J005245.1-722843: a rare BeWD binary in the Small Magellanic Cloud?

On May 27 2024, the Wide-field X-ray Telescope onboard the Einstein Probe (EP) mission detected enhanced X-ray emission from a new transient source in the Small Magellanic Cloud (SMC) during its commissioning phase. Prompt follow-up with the EP Follow-up X-ray Telescope, the Swift X-ray Telescope and NICER have revealed a very soft, thermally emitting source (kT$\sim$0.1 keV at the outburst peak) with an X-ray luminosity of $L\sim4\times10^{38}$ erg s$^{-1}$, labelled EP J005245.1-722843. This super-soft outburst faded very quickly in a week time. Several emission lines and absorption edges were present in the X-ray spectrum, including deep Nitrogen (0.67 keV) and Oxygen (0.87 keV) absorption edges. The X-ray emission resembles the SSS phase of typical nova outbursts from an accreting white dwarf (WD) in a binary system, despite the X-ray source being historically associated with an O9-B0e massive star exhibiting a 17.55 days periodicity in the optical band. The discovery of this super-soft outburst suggests that EP J005245.1-722843 is a BeWD X-ray binary: an elusive evolutionary stage where two main-sequence massive stars have undergone a common envelope phase and experienced at least two episodes of mass transfer. In addition, the very short duration of the outburst and the presence of Ne features hint at a rather massive, i.e., close to the Chandrasekhar limit, Ne-O WD in the system.

Einstein Probe detecteert mysterieuze explosie van röntgenstraling uit het vroege heelal – Kuuke's Sterrenbeelden

Deze raadselachtige ontdekking dwingt astronomen mogelijk om opnieuw na te denken over de oorsprong van gammaflitsen. Einstein Probe bestudeert het heelal in röntgenlicht. Uitgerust met een nieuwe generatie röntgeninstrumenten met hoge gevoeligheid en een zeer breed zicht, zal deze missie de hemel onderzoeken en jagen op krachtige explosies van röntgenlicht afkomstig van mysterieuze hemellichamen zoals…

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Зонд Ейнштейна зафіксував дивний спалах у космосі — потенційно новий тип астрономічного явища

Зонд Ейнштейна (Einstein Probe) виявив загадковий об'єкт, який спалахує в космосі подібно

Зонд Ейнштейна зафіксував дивний спалах у космосі — потенційно новий тип астрономічного явища

Зонд Ейнштейна (Einstein Probe) виявив загадковий об'єкт, який спалахує в космосі подібно

Chinas Einstein-Probe-Satellit entdeckt „Feuerwerk“ im Weltraum

Das zuvor unentdeckte transiente Objekt weist demnach spektrale und zeitliche Merkmale auf, die mit keiner bekannten Art übereinstimmen. Dies könnte spannende neue Einblicke in das Universum und extreme physikalische Prozesse bieten. Das kurzlebige kosmische „Feuerwerk“ könnte laut ScienceNet ...