| Proposal ID | 020066 |
| Title | SEARCHING FOR CHANGING LOOK SEYFERT GALAXIES |
| Download Data Associated to the proposal | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0200660101 |
| DOI | https://doi.org/10.5270/esa-c33dh8g |
| Principal Investigator, PI | Prof GIORGIO MATT |
| Abstract | With the aim of discovering more sources which change their appearance fromCompton--thin (if Seyfert 2s) or unabsorbed (if Seyfert 1s) toreflection--dominated, we propose to observe, for 10 ks each, four objects whichhave been proposed to be the optical counterparts of X--ray sources in theGrossan LMA HEAO1 catalog. The four candidate counterparts have been later onobserved with imaging X-ray instruments, and found on those occasions to be muchfainter. The XMM-$Newton$ observations, if catching the sources at much brighterfluxes than during the previous hard X--ray imaging observations, would confirmtheir transient nature. |
| Publications |
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| Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
| Temporal Coverage | 2004-06-02T14:52:45Z/2004-09-21T01:23:33Z |
| 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 | 2005-10-20T00:00:00Z |
| Last Update | 2025-01-27 |
| Keywords | "compton thin", "changing look", "seyfert 2s", "imaging xray instruments", "seyfert 1s", "candidate counterparts", "x ray sources", "XMM", "brighter fluxes", "optical counterparts", "seyfert galaxy", "reflection dominated" |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, Prof GIORGIO MATT, 2005, 'SEARCHING FOR CHANGING LOOK' SEYFERT GALAXIES', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-c33dh8g |