A dataset provided by the European Space Agency

Proposal ID 0220146
Obs ID 02201460001, 02201460002, 02201460003, 02201460004, 02201460005
Title High Energy Variability and Particle Acceleration in the Quasar 3C273
Download Data Associated to the proposal https://isla.esac.esa.int/tap/download/bundle?format=ascii_curl&product_id=prop_id:0220146
DOI https://doi.org/10.57780/esa-hz6vrhq
Author McHardy
Abstract 3C273 is the brightest active galaxy in the sky, in almost allwavebands from radio to low energy gamma-rays (eg Courvoisier \etal1990). The large majority of its emission comes from a relativisticjet oriented towards the observer. The radio through optical emissionis synchrotron emission and the X- and Gamma-ray emission almostcertainly comes from Compton scattering of low energy seed photons byrelativistic particles in the jet. However the origin of the seedphotons, and the way in which the scattering particles are acceleratedin the jet are unknown. INTEGRAL spectral quasi-monitoringobservations of 3C273 (10 observations of 50ksec each separated by 5days, during one observing window), coupled withdaily X-ray monitoring with RXTE, and ground based monitoring ofthe low energy synchrotron continuum, provide the idea way to answerthese questions. Previous Gamma-ray observations have been completelyinadequate. Although not a major part of this proposal, we will also be able to detect red and blue shiftedannihilation lines which will enable us to determine what the jet isactually made of.
Publications
Temporal Coverage 2004-12-20T19:06:20Z / 2005-01-08T09:02:59Z
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 2025-03-25T09:54:30Z
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, McHardy, 2025, 'High Energy Variability and Particle Acceleration in the Quasar 3C273', 1.0, European Space Agency, https://doi.org/10.57780/esa-hz6vrhq