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- W21253752 abstract "Abstract. We present preliminary results of the analysis of 3C 273 observed with INTEGRAL and XMM-Newton during 2003 2005. The available data span from opticalto hard X frequencies and show significant variability. Simulations with SIMBOL-X arealso presented. Key words. quasars: individual: 3C 273 – X-rays: galaxies – Galaxies: active 1. Introduction We selected all the INTEGRAL publicly avail-able pointings with the source in the FCFOV(<5 to the boresight) within the period 20032005, resulting in a total exposure of about1 Ms. We analyzed the IBIS data using thestandard software OSA v. 5.1. We retrievedthe public XMM-Newton data collected overthe same period, for a total exposure of 128 ksand analyzed them by means of the standardsoftware SAS v. 7.0.Lightcurves have been produced for 3C273 from optical ( XMM /OM) to hard X( INTEGRAL /ISGRI) bands, obtained with abinning time from 1:3 to 65 ks for OM data,3 ks for PN and 90 ks for ISGRI (Fig.1). Thelightcurves in the optical and ultraviolet bandsare constant within errors, while strong fluxvariations show up in the X-ray bands. At thebeginning of 2003 the source was increasingits flux level in both 0:2 1 and 3 10 keVbands, followed by a long decrease (2004) and" @default.
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- W21253752 date "2008-01-01" @default.
- W21253752 modified "2023-09-26" @default.
- W21253752 title "Three years monitoring of 3C 273 with INTEGRAL and XMM-Newton." @default.
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