A dataset provided by the European Space Agency

Proposal ID 0620065
Obs ID 06200650001
Title A week in the ordinary life of the blazar 3C 454.3
Download Data Associated to the proposal https://isla.esac.esa.int/tap/download/bundle?format=ascii_curl&product_id=prop_id:0620065
DOI https://doi.org/10.57780/esa-r5kz7xy
Author Donnarumma
Abstract 3C 454.3 is one of the most variable blazars from radio up to gamma-raysenergy bands. In 2005 and 2007 the source was detected in a strong optical activity thattriggered observations by other observatories. In 2005 a strong hard X-rays emission was detected by INTEGRAL from 3 up to 200 keV, the flux being afactor 2-3 higher than that previously observed. The model predictions were notstrongly constrained. The lack of gamma-rays data did not help to break thedegeneracy among the parameters in SSC and EC models. In 2007 the increase in the optical activity triggered Swift and AGILEobservations. During this flare AGILE detected a flux of 3C 454.3 that was the highest everdetected for this blazar (280+-40 E-8 photons cm ^-2 s^-1). On the other hand Swift-BAT did not detect a significant hard-X rays emission. At moment the available data do not help to investigate the correlation (if any) between the hard-Xrays and gamma-rays emissions in both high and low gamma-ray activity. AGILE is showing as 3C 454.3 is very active in the gamma-rays, then the highstate seems to be the ``ordinary life of this source. However we argue as all gamma-ray states of the source have to beinvestigated simultaneously with its hard-X rays state. On the basis of these considerations we request to monitor the activity ofthis blazar over a period of 1-week during the 3/4 weeks of a standard AGILE pointing.
Publications
Temporal Coverage 2009-05-22T12:02:29Z / 2009-05-31T09:39:03Z
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 2025-03-25T09:54:35Z
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, Donnarumma, 2025, 'A week in the "ordinary " life of the blazar 3C 454.3', 1.0, European Space Agency, https://doi.org/10.57780/esa-r5kz7xy