Although the Cygnus Loop is a middle-aged SNR, it contains fresh ejecta in itscenter. Since the ejecta are higher temperature than that of the swept-up ISM,we can clearly detect Fe-L, Mg, Si, S emission lines from ejecta. However theejecta are surrounded by the swept-up ISM, which makes us difficult to study theemission from O and N in the ejecta where the emission from the shell dominates.There is a blow-up region in the south of the Cygnus Loop where, we expect, theejecta are spew out from the shell. There is no surrounding swept up matter. Dueto its proximity, there is very little interstellar absorption feature. Wepropose to observe the south blow-up region to investigate the ejecta withoutobstacle.
Instrument
EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage
2006-05-13T15:29:24Z/2006-05-17T15:26:59Z
Version
17.56_20190403_1200
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, Prof Hiroshi Tsunemi, 2007, 'Observation of the ejecta in the Cygnus Loop', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-h3ep1gp
