A dataset provided by the European Space Agency

Proposal ID 0320015
Obs ID 03200150002
Title INVESTIGATING THE CENTRAL ENGINE NATURE OF THE TWO ENIGMATIC SEYFERT GALAXIES NGC 2110 AND NGC 2992
Download Data Associated to the proposal https://isla.esac.esa.int/tap/download/bundle?format=ascii_curl&product_id=prop_id:0320015
DOI https://doi.org/10.57780/esa-ynp2f56
Author Deluit
Abstract X-ray emission provides the best tracer of conditions close to the central engines of AGNs. At low energies, AGNs have a power law spectrum modified by the effects of absorption and reflection. At higher energies, in the hard X-ray domain, we have access to the intrinsic emission of these sources. We can measure the primary power law, the reflection hump and the high energy cutoff. AGNs exhibit also rapid, aperiodic variability for which no fully satisfying explanation has been advanced. INTEGRAL offers a unique opportunity for a wide variety of sensitive X-ray observations to investigate the physical processes at the origin of the complex emission of two Seyfert galaxies NGC 2110 and NGC 2992 which display many enigmatic properties. Indeed, their Seyfert classification changed from 2 to 1 type without clear explanation and in the case of NGC 2992, a rebuilding of the AGN activity has been observed in 1998 reaching its flux level of 1978. We ask for one INTEGRAL observation of 400 ks for each object to obtain significant informations on their high energy emission, in particular on the continuum and on the cutoff allowing us to study the nature of their central engine.
Publications
Temporal Coverage 2005-05-04T13:44:36Z / 2005-05-10T06:53:59Z
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, Deluit, 2025, 'INVESTIGATING THE CENTRAL ENGINE NATURE OF THE TWO ENIGMATIC SEYFERT GALAXIES NGC 2110 AND NGC 2992', 1.0, European Space Agency, https://doi.org/10.57780/esa-ynp2f56