A dataset provided by the European Space Agency

Proposal ID 040375
Title X-ray characterization of the FIRST Flat Spectrum Sample
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DOI https://doi.org/10.5270/esa-r2nfx09
Principal Investigator, PI Dr Giovanni Fossati
Abstract The FIRST Flat Spectrum Sample (FFSS) is a deep radio-selected sample, unbiasedwith respect to x-ray emission. It is designed to enable us to determine thetrue census of the different types of blazars, resolving a long-standinguncertainty, and the first step towards understanding how Nature makes jets.This proposal aims to determine the type of FIRST blazars, which is easilydetermined from radio-optical-X color and basic information about X-ray spectrum(hardness ratios). We propose to complete the x-ray characterization of a firstFFSS subsample by observing the 17 sources for which no X-ray informationcurrently exists. With this information we will be able to answer the keyquestion: What kind of jets does Nature make?
Publications
Instrument EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage 2006-06-05T17:33:38Z/2007-03-23T14:49:45Z
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 2008-04-13T00:00:00Z
Keywords "xray characterization", "xray information", "step towards", "standing uncertainty", "radio optix color", "basic information", "flat spectrum sample", "deep radio", "x ray characterization", "xray emission", "makes jets", "ffss subsample"
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, Dr Giovanni Fossati, 2008, 'X-ray characterization of the FIRST Flat Spectrum Sample', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-r2nfx09