| Name | 079062 |
| Title | DETERMINING THE NATURE OF THE BRIGHTEST SERENDIPITOUS NUSTAR SOURCE |
| URL | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0790620101 |
| DOI | https://doi.org/10.5270/esa-ze042ws |
| Author | Dr John Tomsick |
| Description | In our systematic search for serendipitous sources (serendips) in the NuSTAR data, we have found a very bright (7.5 mCrab in the 2-10 keV band) serendip (J0923 s1) near the edge of one of the NuSTAR fields of view. The source has been previously detected in the soft X-ray band, but its nature is unknown. Based on its X-ray spectrum, its optical counterpart, and its long-term variability (as seen by MAXI), it must be Galactic, and, while some of its properties are suggestive of a magnetic Cataclysmic Variable, other properties cause problems with this interpretation. One interesting possibility is that it may be an accreting black hole with a high temperature disk. We propose NuSTAR and XMM-Newton observations to determine the nature of J0923 s1. |
| Publication | No observations found associated with the current proposal |
| Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
| Temporal Coverage | 2016-11-24T13:00:00Z/2016-11-24T19:23:20Z |
| Version | 19.17_20220121_1250 |
| 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 | 2017-12-12T23:00:00Z |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, 2017-12-12T23:00:00Z, 079062, 19.17_20220121_1250. https://doi.org/10.5270/esa-ze042ws |