A dataset provided by the European Space Agency

Name 065153
Title A test for obscuring clouds in the BLR of the changing look Seyfert 1 H0557-385
URL

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
Author Dr ANNA LIA LONGINOTTI
Description We propose to monitor the extreme ..changing-look Seyfert 1 H0557-385. We want
to probe the short time scale variability of the obscuring gas that varied in
previous XMM data. The source was observed in different flux states on a 4 yr
time scale. The flux drop can be entirely explained by line-of-sight clouds with
Nh virgul8*10e23 cm^-2 partially covering the nuclear source. This interpretation is
very robust due to the presence of a warm absorber that did not change with the
source flux, possibly suggesting a Broad Line Region origin for the clouds. The
source has a multi-component BLR, so we will monitor the optical lines
properties in a proposal for optical spectroscopy and we will request optical
spectra simultaneous to the X-ray data. We request 87 ks to be split in 3 XMM observations.
Publication No observations found associated with the current proposal
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 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 2011-12-23T00:00:00Z
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, Dr ANNA LIA LONGINOTTI, 2011, 065153, 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-6xmrm5q