EDP Sciences
Free access
Issue
A&A
Volume 414, Number 3, February II 2004
Page(s) 839 - 844
Section Extragalactic astronomy
DOI http://dx.doi.org/10.1051/0004-6361:20031612


A&A 414, 839-844 (2004)
DOI: 10.1051/0004-6361:20031612

3EG J2027+3429: Another blazar behind the Galactic Plane

V. Sguera1, A. Malizia2, L. Bassani2, J. B. Stephen2 and G. Di Cocco2

1  Dipartimento di Astronomia di Bologna, via Ranzani 1, 40127 Bologna, Italy
2  Istituto di Astrofisica Spaziale e Fisica Cosmica Sezione di Bologna, Area di Ricerca di Bologna, Via P. Gobetti 101, Bologna, Italy

(Received 21 May 2003 / Accepted 19 August 2003 )

Abstract
We report on the association of an X-ray source (WGA J2025.1+3342), serendipitously found with BeppoSAX in two separate observations, with the unidentified EGRET source 3EG J2027+3429. The source is detected from 1 keV up to about 100 keV, has a flat ( $\Gamma=0.6{-}1.5$) spectrum and is highly variable both in intensity and shape. The data indicate marginal evidence for an iron line in the source rest frame. The overall X-ray luminosity is ${\sim}4 \times10^{45}$ erg s -1, typical of a quasar. The X-ray source is coincident in radio wavelengths with a bright object characterized by a flat spectrum over the band 0.3-10 GHz while in the optical it is identified with a quasar at redshift 0.22. All available data indicate a SED compatible with a low frequency peaked or red blazar type object. This identification is interesting because this is the second blazar found behind the galactic plane in the direction of the Cygnus region.


Key words: X-rays: galaxies -- X-rays: individual: 3EG J2027+3429 -- BL Lacertae objects: general

Offprint request: V. Sguera, sguera@bo.iasf.cnr.it

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