A dataset provided by the European Space Agency

Name: A test for obscuring clouds in the BLR of the changing look Seyfert 1 H0557-385
Published: 2011-12-23T00:00:00Z
License: https://creativecommons.org/licenses/by-nc/3.0/igo

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 https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0651530301 https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0651530401
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	Absorption at the dust sublimation radius and the dichotomy between X-ray and optical classification in the Seyfert galaxy H0557-385 \|Coffey D. Longinotti A. L. et al. \| MNRAS \| 443-1788 \| 2014 \| 2014MNRAS.443.1788C \| http://ui.adsabs.harvard.edu/#abs/2014MNRAS.443.1788C Multiwavelength search for counterparts of supersoft X-ray sources in M31 \|Chiosi E. Orio M. et al. \| MNRAS \| 443-1821 \| 2014 \| 2014MNRAS.443.1821C \| http://ui.adsabs.harvard.edu/#abs/2014MNRAS.443.1821C Serendipitous UV source catalogues for 10 years of XMM and 5 years of Swift \|Yershov V. N. \| Ap&SS \| 354-97 \| 2014 \| 2014Ap&SS.354...97Y \| http://ui.adsabs.harvard.edu/#abs/2014Ap&SS.354...97Y The Million Optical - Radio/X-ray Associations (MORX) Catalogue \|Flesch Eric W. \| PASA \| 33-52 \| 2016 \| 2016PASA...33...52F \| http://ui.adsabs.harvard.edu/#abs/2016PASA...33...52F Are narrow-line Seyfert 1 galaxies highly accreting low-MBH AGNs? \|Williams James K. Gliozzi Mario \| MNRAS \| 480-96 \| 2018 \| 2018MNRAS.480...96W \| http://ui.adsabs.harvard.edu/#abs/2018MNRAS.480...96W Classification of 4XMM-DR9 sources by machine learning \|Zhang Yanxia Zhao Yongheng \| MNRAS \| 503-5263 \| 2021 \| 2021MNRAS.503.5263Z \| http://ui.adsabs.harvard.edu/#abs/2021MNRAS.503.5263Z The XMM-Newton Line Emission Analysis Program (X-LEAP). I. Emission-line Survey of O VII O VIII and Fe L-shell Transitions \|Pan Zeyang Qu Zhijie et al. \| ApJS \| 271-62 \| 2024 \| 2024ApJS..271...62P \| http://ui.adsabs.harvard.edu/#abs/2024ApJS..271...62P Robust constraints on feebly interacting particles using XMM-Newton \|Luque Pedro De la Torre Balaji Shyam \| PhRvD \| 109-L101305 \| 2024 \| 2024PhRvD.109j1305L \| http://ui.adsabs.harvard.edu/#abs/2024PhRvD.109j1305L Multimessenger search for electrophilic feebly interacting particles from supernovae \|Luque Pedro De la Torre Balaji Shyam \| PhRvD \| 109-103028 \| 2024 \| 2024PhRvD.109j3028L \| http://ui.adsabs.harvard.edu/#abs/2024PhRvD.109j3028L Importance of Cosmic-Ray Propagation on Sub-GeV Dark Matter Constraints \|De la Torre Luque Pedro Balaji Shyam \| ApJ \| 968-46 \| 2024 \| 2024ApJ...968...46D \| http://ui.adsabs.harvard.edu/#abs/2024ApJ...968...46D New 511 keV Line Data Provide Strongest sub-GeV Dark Matter Constraints \|De la Torre Luque Pedro Balaji Shyam \| ApJ \| 973-L6 \| 2024 \| 2024ApJ...973L...6D \| http://ui.adsabs.harvard.edu/#abs/2024ApJ...973L...6D
Instrument	EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage	2010-10-15T10:12:43Z/2010-10-31T16:27:24Z
Version	21.51_20241115_1113
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
Last Update	2026-07-09
Keywords	"warm absorber", "optical spectra", "yr time scale", "multi component blr", "obscuring clouds", "optical spectroscopy", "XMM", "optical lines properties", "`` changing look", "flux drop", "h0557 385", "source flux", "xray data", "10e23 cm", "sight clouds", "nuclear source", "xmm data", "changing look seyfert", "obscuring gas"
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', 21.51_20241115_1113, European Space Agency, https://doi.org/10.5270/esa-6xmrm5q
Rights	Data hosted in the ESA Space Science Archives are distributed under the CC BY-NC 3.0 IGO license.