We propose a deep 100 ks observation of the Odd Radio Circle (ORC) J0624-6948, alow-surface brightness radio ring, lying between the Galactic plane and theLarge Magellanic Cloud (LMC).With a diameter of 3.3 arcmin, a flatter radio spectral index, the lack of aprominent central galaxy as a possible host, and a larger apparent size comparedto other ORCs, it is likely a supernova remnant in a rarefied environment,either from an isolated type Ia SN or a hypervelocity runaway massive star.The proposed observation will look for the faint extended X-ray counterpartexpected, providing key physical parameters such as age and ambient density, andhelp to ascertain the type of progenitor. Alternative scenarios can be explored by characterising the point-source population within the ORC.
Instrument
EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage
2023-03-15T22:39:46Z/2023-03-17T06:23:06Z
Version
20.10_20230417_1156
Mission Description
The European Space Agencys (ESA) X-ray Multi-Mirror Mission (XMM-Newton) was launched by an Ariane 504 on December 10th 1999. XMM-Newton is ESAs second cornerstone of the Horizon 2000 Science Programme. It carries 3 high throughput X-ray telescopes with an unprecedented effective area, and an optical monitor, the first flown on a X-ray observatory. The large collecting area and ability to make long uninterrupted exposures provide highly sensitive observations. Since Earths atmosphere blocks out all X-rays, only a telescope in space can detect and study celestial X-ray sources. The XMM-Newton mission is helping scientists to solve a number of cosmic mysteries, ranging from the enigmatic black holes to the origins of the Universe itself. Observing time on XMM-Newton is being made available to the scientific community, applying for observational periods on a competitive basis.
European Space Agency, Dr Pierre Maggi, 2024, 'X-raying an Odd Radio Circle near the LMC', 20.10_20230417_1156, European Space Agency, https://doi.org/10.57780/esa-[xxxxxxx]
