| Name | 086065 |
| Title | Follow-up observations of Gamma-Cas analogs |
| URL | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0860650501 |
| DOI | https://doi.org/10.57780/esa-ts7tbv5 |
| Author | European Space Agency |
| 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 new X-ray data together with the existing optical data 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 | 2021-01-24T04:00:52Z/2021-01-24T17:37:32Z |
| 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 | 2022-02-09T00:00:00Z |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, 2022, Follow-Up Observations Of Gamma-Cas Analogs, 18.02_20200221_1200, European Space Agency, https://doi.org/10.57780/esa-ts7tbv5 |