A dataset provided by the European Space Agency

Name 050068
Title Disentangling the High-Energy sources in the peculiar magnetic star HD191612
URL

https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0500680201

DOI https://doi.org/10.5270/esa-ginwufm
Author Dr Yael Naze
Description The peculiar star HD191612 has been followed both in the visible and X-ray
ranges. In the visible domain, this star displays spectacular line profile
variations alternating between two different spectral states (O6-O8) with a
period of virgul538d. Observations with XMM over half this timescale have revealed an
overluminosity compared to typical O-type stars and some variations, about 30%
in flux. However, the origin of the X-rays is still unclear: since a recent
study unveiled the binarity of the star (with an orbital period of 1540d), a
colliding wind phenomenon might contribute to the bright emission. To assess the
origin of the X-ray emission in this peculiar star, an additional observation
with XMM-Newton is needed.
Publication No observations found associated with the current proposal
Instrument EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage 2008-04-02T23:43:13Z/2008-04-03T06:21:47Z
Version 17.56_20190403_1200
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.
Creator Contact https://www.cosmos.esa.int/web/xmm-newton/xmm-newton-helpdesk
Date Published 2009-06-05T00:00:00Z
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, Dr Yael Naze, 2009, 050068, 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-ginwufm