|Title||Searching for long-term spectral evolution in the Magnificent Seven|
|Author||Dr Frank Haberl|
|Description||RX J0720.4-3125 is unique among the Magnificent Seven (M7) isolated neutron stars, showing long-term variations in its X-ray spectrum over more than 10 years. If the M7 stars are indeed descendants of magnetars, then a decaying magnetic field leads to decreasing magnetically-driven glitch activity and it is conceivable that also other members of the group exhibit a similar behaviour. We propose snapshot XMM-Newton observations of the four M7 stars RBS1223, RBS1774, RX J0806.4-4123 and RX J0420.0-5022 to look for long-term spectral changes. The EPIC-pn observations will achieve an accuracy of better than 2 eV in the temperature determination, sufficient for comparison with archival observations and to identify an event as observed from RX J0720.4-3125.|
|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, 2021-01-20T23:00:00Z, 084414, 18.00_20191217_1110. https://doi.org/10.5270/esa-9k0emts|