| Proposal ID | 065153 |
| Title | A test for obscuring clouds in the BLR of the changing look Seyfert 1 H0557-385 |
| Download Data Associated to the proposal | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0651530201 |
| DOI | https://doi.org/10.5270/esa-6xmrm5q |
| Principal Investigator, PI | Dr ANNA LIA LONGINOTTI |
| Abstract | We propose to monitor the extreme changing-look Seyfert 1 H0557-385. We wantto probe the short time scale variability of the obscuring gas that varied inprevious XMM data. The source was observed in different flux states on a 4 yrtime scale. The flux drop can be entirely explained by line-of-sight clouds withNh ~8*10e23 cm^-2 partially covering the nuclear source. This interpretation isvery robust due to the presence of a warm absorber that did not change with thesource flux, possibly suggesting a Broad Line Region origin for the clouds. Thesource has a multi-component BLR, so we will monitor the optical linesproperties in a proposal for optical spectroscopy and we will request opticalspectra simultaneous to the X-ray data. We request 87 ks to be split in 3 XMM observations. |
| Publications |
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| Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
| Temporal Coverage | 2010-10-15T10:12:43Z/2010-10-31T16:27:24Z |
| 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 | 2011-12-23T00:00:00Z |
| Keywords | "`` changing look", "10e23 cm", "optical spectroscopy", "optical lines properties", "warm absorber", "obscuring clouds", "flux drop", "XMM", "sight clouds", "optical spectra", "obscuring gas", "multi component blr", "yr time scale", "xray data", "source flux", "h0557 385", "xmm data", "nuclear source", "changing look seyfert" |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, Dr ANNA LIA LONGINOTTI, 2011, 'A test for obscuring clouds in the BLR of the changing look Seyfert 1 H0557-385', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-6xmrm5q |