A dataset provided by the European Space Agency

Name 082031
Title Hunting for gamma Cas objects
URL

http://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0820310101
http://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0820310201
http://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0820310301
http://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0820310401
http://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0820310501
http://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0820310601
http://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0820310701
http://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0820310801
http://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0820310901
http://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0820311001
http://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0820311101
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http://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0820311201
http://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0820311501

DOI 10.5270/esa-97lizme
Author Dr Yael Naze
Description gamma Cas objects are Be stars presenting an unusually intense and hard X-ray emission. Currently, only about a dozen such objects are known and it is well possible that additional cases, even bright ones, remain undetected. To improve the situation, we propose to observe a set of well-chosen Be stars with snapshots to search for the characteristic gamma Cas signatures.
Publication Three discoveries of u03b3 Cas analogues from dedicated XMM-Newton observations of Be stars . Nazu00e9, Yau00ebl, Motch, Christian, et all. . MNRAS . 493-2511 . 2020 . 2020MNRAS.493.2511N ,
Instrument EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage 2018-05-17T09:14:17Z/2019-03-31T02:33:31Z
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 2020-05-03T22:00:00Z
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, 2020-05-03T22:00:00Z, 082031, 17.56_20190403_1200. https://doi.org/10.5270/esa-97lizme