| Proposal ID | 082497 |
| Title | Recognizing Megamaser Galaxies from X-Ray Spectral Surveys |
| Download Data Associated to the proposal | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0824970301 |
| DOI | https://doi.org/10.5270/esa-3x3tl7s |
| Principal Investigator, PI | Mrs Katharina Leiter |
| Abstract | Our extensive archival survey of XMM-Newton observations of water megamasergalaxies revealed an important result: we can tell apart megamaser andnon-megamaser active galaxies from the shape of their X-ray spectra. Maser havemore complex X-ray spectra than non-masers. This general rule is derived from acomparison of 37 maser and 38 non-maser sources. With our criteria, we cancharacterize 34 out of 37 sources as maser galaxies. The analysis of the 3remaining sources was inconclusive due to their low-quality archival spectra. Toconfirm our hypothesis and construct clean training sample for automated masersurveys, we propose re-observations of these 3 maser sources. Once confirmed,this result will yield strong constraints on target-selection criteria for future maser surveys. |
| Publications |
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| Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
| Temporal Coverage | 2019-01-26T05:26:45Z/2019-01-26T11:50:04Z |
| Version | 17.56_20190403_1200 |
| Mission Description | The European Space Agencys (ESA) X-ray Multi-Mirror Mission (XMM-Newton) was launched by an Ariane 504 on December 10th 1999. XMM-Newton is ESAs 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 Earths 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 | 2020-02-18T23:00:00Z |
| Keywords | "target selection criteria", "megamaser active galaxy", "automated maser surveys", "xray spectral surveys", "XMM", "future maser surveys", "maser sources", "xmm newton", "complex xray spectra", "tell apart megamaser", "xray spectra", "water megamaser galaxy", "maser galaxy", "extensive archival survey", "XMM-Newton", "recognizing megamaser galaxy" |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, Mrs Katharina Leiter, 2020, 'Recognizing Megamaser Galaxies from X-Ray Spectral Surveys', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-3x3tl7s |