A dataset provided by the European Space Agency

Proposal ID 015179
Title The Highest L_x/L_opt Sources in the ROSAT All-Sky Survey
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https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0151790701
https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0151790801
DOI https://doi.org/10.5270/esa-niqhg09
Principal Investigator, PI Dr Derek Fox
Abstract Theoretical predictions for the number of INSs in the ROSAT All-Sky Survey,>10^2, dwarf the group of seven identified to date, at least partly becausesource confusion in the PSPC error circles has made counterpart identification/exclusion difficult. We have developed a novel statistical technique to quantifywhich RASS sources are least likely to be represented by a counterpart in thelatest optical or radio source catalogs. Short XMM observations of these sourceswill provide us with arcsecond positions to confirm the absence of brightcounterparts and enable follow-up observations, and give us >1000-count X-rayspectra which may suggest the source nature. By this means we hope to discovernew INSs in bulk and, potentially, other high Lx/Lopt source classes as well.
Publications
Instrument EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage 2003-10-10T09:40:04Z/2003-10-16T15:15:42Z
Version 17.56_20190403_1200
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 2004-11-04T00:00:00Z
Keywords "l_opt sources", "lopt source classes", "bright counterparts", "XMM", "source confusion", "radio source catalogs", "short xmm", "novel statistical technique", "exclusion difficult", "arcsecond positions", "counterpart identification", "pspc error circles", "rass sources", "ROSAT", "count xray spectra", "sky survey"
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, Dr Derek Fox, 2004, 'The Highest L_x/L_opt Sources in the ROSAT All-Sky Survey', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-niqhg09