A dataset provided by the European Space Agency

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

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

DOI https://doi.org/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
Publication No observations found associated with the current proposal
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