A dataset provided by the European Space Agency

Proposal ID 0320110
Obs ID 03201100001, 03201100003, 03201100004
Title An INTEGRAL Way to Solve the X-ray Background Problem
Download Data Associated to the proposal https://isla.esac.esa.int/tap/download/bundle?format=ascii_curl&product_id=prop_id:0320110
DOI https://doi.org/10.57780/esa-6y07vfs
Author Urry
Abstract Observations of the X-ray background strongly suggest that there should be a large number of highly obscured AGN in the local Universe. However, the exact number and space density of these objects remains unknown, even though they may nearly double the space density of supermassive black holes. These Compton-thick AGN will be easily detected by INTEGRAL. We propose very deep (3 Msec) INTEGRAL observations of the XMM-LSS field, which will provide a complete view of the highly obscured AGN population in the local Universe. The combination of INTEGRAL high-energy coverage with XMMs excellent X-ray spectral and spatial resolution allows for essential multiwavelength follow up of these sources, providing unprecedented information on NH, redshifts, bolometric luminosities, etc., for Compton-thick AGN. Together with the existing XMM, GALEX, Spitzer and VLA data, the INTEGRAL observations will make this by far the best field in the sky to obtain a complete sample of Compton-thick AGN in the local Universe, leading to a solution of the long-standing X-ray background problem and a full understanding of the demographics of black holes.
Publications
Temporal Coverage 2005-07-16T14:48:43Z / 2007-07-20T14:22:35Z
Version 1.0
Mission Description The INTEGRAL (International Gamma-Ray Astrophysics Laboratory) mission, launched by the European Space Agency (ESA) on October 17, 2002, was designed to study high-energy phenomena in the universe. INTEGRAL was operating until february 2025 and it was equipped with three high-energy instruments: the Imager on Board the INTEGRAL Satellite (IBIS), the Spectrometer on INTEGRAL (SPI), and the JEM-X (Joint European Monitor for X-rays). Its Optical Monitoring Camera (OMC) provided optical V-band magnitude measurements, complementing the high-energy observations.
Creator Contact https://www.cosmos.esa.int/web/integral/helpdesk
Date Published 2025-03-25T09:54:32Z
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, Urry, 2025, 'An INTEGRAL Way to Solve the X-ray Background Problem', 1.0, European Space Agency, https://doi.org/10.57780/esa-6y07vfs