A dataset provided by the European Space Agency

Name 008234
Title Constraints on H0 from Time-Delay Measurements of PG1115+080
URL

http://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0082340101
http://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0082340201

DOI 10.5270/esa-bse3uos
Author Dr GEORGE CHARTAS
Description We plan to make use of XMM.s unique capabilities and employ a novel technique to measure the gravitational lens time-delay between the lensed images PG1115+080 A1 and A2 to an accuracy of about 1percent. PG1115+080 is known to be highly X-ray variable on short(hours) and long(months) time-scales and the time-delay between the closest pair A1 and A2 is expected to be about 5 hours. We therefore expect to measure the time-delay within a single XMM observation. We also expect to spatially resolve the diffuse X-ray component of a nearby group of galaxies that contributes to the lensing effect. A determination of either the time-delay or the properties of the nearby group of PG1115+080 will significantly reduce the uncertainty in present estimates of H0 based on the gravitational lens
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Instrument EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage 2001-11-25T19:09:41Z/2001-11-26T15:30:16Z
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 2002-12-14T00:00:00Z
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, 2002-12-14T00:00:00Z, 008234, 17.56_20190403_1200. https://doi.org/10.5270/esa-bse3uos