|Title||The mysterious X-ray emission and optical flash of Zeta Lyrae|
|Author||Dr Thomas Maccarone|
|Description||Zeta Lyrae is a nearby (d=47 pc) bright (V=4.1) star which has shown an strong optical flash and which shows strong X-ray emission. The system is a single-lined spectroscopic binary. While ordinarily, these properties could all be explained by coronal activity from either the primary or the secondary, the primary here is an A star, and the secondary is both unseen, and has a mass of at least 0.8 solar masses. The source is not detected in the radio down to about 40 microJy (about 20 times below the flux density expected for a stellar mass black hole at this X-ray luminosity). We propose XMM observations to test ideas for the origin of the X-ray emission and hopefully to explain the optical flash as well.|
|Publication||No observations found associated with the current proposal|
|Instrument||EMOS1, EMOS2, EPN, OM, RGS1, RGS2|
|Mission Description||The European Space Agency's (ESA) X-ray Multi-Mirror Mission (XMM-Newton) was launched by an Ariane 504 on December 10th 1999. XMM-Newton is ESA's 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 Earth's 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.
|Publisher And Registrant||European Space Agency|
|Credit Guidelines||European Space Agency, 2013-09-21T00:00:00Z, 069037, 17.56_20190403_1200. https://doi.org/10.5270/esa-m1oktfs|