We propose to obtain short exposure of the PN G135.9+55.9, in particular of itsbinary central nucleus. It is remarkable, because it is the most oxygen-poor PNknown, with an oxygen abundance of about 1/100 of the solar value. This PN isalso one of the few where a close binary core has been detected. Ourobservations show that the period of the system is virgul4 h and that one of thecomponents of the system is a post-AGB, pre-white dwarf hot star, the other ismore massive compact object, most probably a neutron star. Photometry showssignificant irradiation of elliptically distorted central star of the PN. We aimto confirm that it is the optical counterpart of the RASS source and to probeits spectral composition.
Instrument
EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage
2006-11-01T21:55:58Z/2006-11-02T05:27:58Z
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, Dr Gagik Tovmasian, 2007, 'The central double-degenerate binary in the most oxygen poor PN G135.9+55.9', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-spppfqu
