A dataset provided by the European Space Agency

Name 084091
Title Follow-up observations of Gamma-Cas analogs


DOI https://doi.org/10.5270/esa-2ly098h
Author Dr Christian Motch
Description Gamma-Cas analogs are early Be stars displaying very unusual hard X-ray emission with a luminosity intermediate between normal massive stars and XRBs. Both an unexpected magnetic activity in a critically rotating star, or accretion in a Be + white dwarf (or neutron star) binary, have been invoked to account for these outstanding features. We request follow-up observations to better characterise the high-energy properties (X-ray temperatures, local absorption and variability patterns) of those Gamma-Cas analogs and candidate analogs lacking sensitive enough observations. The overall data set will allow us to bring stronger constraints on the X-ray emitting mechanism.
Publication No observations found associated with the current proposal
Instrument EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage 2019-03-22T10:19:37Z/2020-04-05T19:01:41Z
Version 18.02_20200221_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 2021-05-09T00:00:00Z
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, 2021-05-09T00:00:00Z, 084091, 18.02_20200221_1200. https://doi.org/10.5270/esa-2ly098h