A dataset provided by the European Space Agency

Proposal ID 0770002
Obs ID 07700020001
Title 3C 454.3 in an exceptionally high state
Download Data Associated to the proposal https://isla.esac.esa.int/tap/download/bundle?format=ascii_curl&product_id=prop_id:0770002
DOI https://doi.org/10.57780/esa-oltym83
Author Vercellone
Abstract AGILE detected 3C 454.3 at an extremely high gamma-rayflux level, about 1.8E-5 ph/cm2/s on December 3rd, asreported in ATel #2326. Subsequently, Fermi detected it evenat higher flux, about 2.2E-5 ph/cm2/s, as reported inATel #2328.3C 454.3 is, currently, the most intense gamma-ray sourcein the sky, much brighter than the Vela pulsar.The response time we request is dictated by the exceptionalityof this event, since this is currently the most intense gamma-rayflare form an AGN ever detected.The source is very active also in the optical R band, as reportedin ATel #2325, reaching a magnitude of R=14.1.The observations should be performed with the hexagonal ditherpattern in order to obtain a simultaneous coverage below 20 keVwith the JEM-X instrument during the whole observation.We request, possibly, a single observation 400 ksec longwith no follow-up observations.During a gamma-ray flare in November 2007 we obtainedan INTEGRAL ToO and we published the results inVercellone et al., 2009, ApJ, 690, 1018.
Publications
Temporal Coverage 2009-12-06T16:42:03Z / 2009-12-12T09:03:32Z
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 2025-03-25T09:54:36Z
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, Vercellone, 2025, '3C 454.3 in an exceptionally high state', 1.0, European Space Agency, https://doi.org/10.57780/esa-oltym83