Extended X-ray emission from the BL Lac object PKS 0521-365
نویسندگان
چکیده
منابع مشابه
Extended X - ray emission from the BL Lac object PKS 0521 − 365
Models that seek to unify BL Lacs and low-power radio galaxies predict that the two types of object should show similar isotropically emitted X-ray emission. Testing this is usually limited by difficulties in separating strong X-ray emission from a BL Lac nucleus and surrounding low-surface brightness emission. In this paper we report ROSAT HRI observations of the z = 0.055 BL Lac object PKS 05...
متن کاملThe X - ray jet and halo of PKS 0521 − 365
Chandra ACIS observations of PKS 0521−365 find that the X-ray emission of this BL Lac object consists of emission from an unresolved core, a diffuse halo, and a 2 arcsec jet feature coincident with the inner radio/optical jet. A comparison with a new ATCA 8.6-GHz map also finds X-ray emission from the bright hotspot southeast of the nucleus. The jet spectrum, from radio to X-ray, is probably sy...
متن کاملISO observations of the BL Lac object PKS 2155 – 304 ⋆
The BL Lacertae object PKS 2155–304 was observed by the Infrared Space Observatory in May and June 1996, during a multiwavelength campaign. These are the first observations in the mid– and far–infrared bands since IRAS. In the observing period, the source showed no detectable time variability at 4.0, 14.3, 60 and 90 μm. The spectrum from 2.8 to 100 μm is well fitted by a single power law with e...
متن کاملExtended radio emission in BL Lac objects I: the images
We have observed 28 sources selected from the 1Jy sample of BL Lac objects (Stickel et al. 1991) with the Very Large Array (VLA) in A, B and D configurations at 1.36, 1.66 and 4.85 GHz, and/or with the Westerbork Synthesis Radio Telescope (WSRT) at 1.40 GHz. In this paper we present high sensitivity images at arcsecond resolution of the 18 objects showing extended structure in our images, and o...
متن کاملMultiband optical polarimetry of the BL Lac object PKS 2155 – 304
Multiband optical polarimetry of the BL Lac object PKS 2155–304. Intranight and long term variability. ABSTRACT The polarized and total flux of the BL Lac object PKS 2155–304 were monitored intensively and simultaneously in the optical UBVRI bands with the Turin photopo-larimeter at the CASLEO 2.15 m telescope during 4 campaigns in June, August, Novem-ber 1998 and August 1999. The effective obs...
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ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 1999
ISSN: 0035-8711,1365-2966
DOI: 10.1046/j.1365-8711.1999.02353.x