BeppoSAX Observations of PKS 2155-304 during an active Gamma-ray State

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dc.creatorMaraschi, L.
dc.creatorChiappetti, L.
dc.creatorTavecchio, F.
dc.creatorCelotti, A.
dc.creatorFossati, G.
dc.creatorGhisellini, G.
dc.creatorGiommi, P.
dc.creatorPian, E.
dc.creatorTagliaferri, G.
dc.creatorTreves, A.
dc.creatorZhang, Y. H.
dc.date1998-08-18
dc.date.accessioned2026-07-07T02:27:39Z
dc.date.available2026-07-07T02:27:39Z
dc.descriptionPKS 2155-304 was observed with BeppoSAX in November 1997 for 64 ksec (total elapsed time 33.5 hours) and, for the first time, simultaneously in gamma-rays with EGRET on board the Compton Gamma Ray Observatory and with the ground based TeV telescope CANGAROO, during a phase of high brightness in the X-ray band. The LECS and MECS light curves show a pronounced flare (with an excursion of a factor 3.5 between min and max), with evidence of spectral hardening at maximum intensity. The source is weakly detected by the PDS in the 12-100 keV band with no significant evidence of variability. The broad band X-ray data from Beppo SAX are compared with the gamma-ray results and discussed in the framework of homogenous synchrotron self Compton models.
dc.description4 pages, 2 figures, latex-macros memsait.sty, epsf.sty, to be published in the proceedings of the conference "Dal nano al Tera eV: tutti i colori degli AGN", third italian conference on AGNs, Roma, May 18-21 1998, Memorie S.A.It
dc.identifierhttps://arxiv.org/abs/astro-ph/9808177
dc.identifierhttp://arxiv.org/abs/astro-ph/9808177
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/12781
dc.subjectAstrophysics
dc.titleBeppoSAX Observations of PKS 2155-304 during an active Gamma-ray State
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