A dataset provided by the European Space Agency

Name 072326
Title Testing for intrinsic absorption in X-ray hard, moderately radio-loud, z>4 RLQs
URL

https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0723260101
https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0723260201

DOI https://doi.org/10.5270/esa-qu8r6on
Author Dr Brendan Miller
Description We propose XMM-Newton/EPIC observations of J0741+2520 (35 ks) and J1639+4340 (24
ks), two extremely optically luminous (Mi < -29) and moderately radio-loud
quasars at high redshift (z>4). Exploratory Chandra snapshots show these objects
have larger hardness ratios than is typical for similar RLQs. We will obtain
high-quality X-ray spectra to determine whether the spectral hardness is due to
heavy intrinsic absorption or to an anomalously flat power law slope. The former
outcome could indicate these are young quasars engaged in the process of
clearing absorbing material from near the nucleus, while the latter outcome
would require either a jet-dominated X-ray spectrum despite moderate radio-
loudness or else modified disk/coronal accretion structure at high luminosity.
Publication No observations found associated with the current proposal
Instrument EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage 2013-08-02T21:41:47Z/2014-03-31T20:34:36Z
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 2015-04-21T22:00:00Z
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, Dr Brendan Miller, 2015, 072326, 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-qu8r6on