VERITAS OBSERVATIONS OF THE BL LAC OBJECT PG 1553+113
نویسندگان
چکیده
منابع مشابه
EVN Observations of the BL Lac object ON 231 ⋆
New EVN images at 5.0 GHz and 8.4 GHz of ON 231 confirm the complex structure of the source, the identification of the core, the presence of components on the two sides of the core itself and a low brightness extension SouthEast of the main jet. The optical behaviour of the source is discussed in connection to changes in the radio structure.
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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...
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We present the results of two ToO BeppoSAX observations of BLLac. During the first observation we detected both the synchrotron and the Compton components. Fast time variability was present, but only for the synchrotron component. During the second observation the spectrum was flatter and only the Compton component was present. Four different SED are presented and can be described by a blob mov...
متن کاملBatse Observations of Bl Lac Objects
The Burst and Transient Source Experiment (BATSE) on the Compton Gamma-Ray Observatory has been shown to be sensitive to non-transient hard X-ray sources in our galaxy, down to flux levels of 100 mCrab for daily measurements, 3 mCrab for integrations over several years. We use the continuous BATSE database and the Earth Occultation technique to extract average flux values between 20 and 200 keV...
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Context. We present the results of a set of observations of nine TeV detected BL Lac objects performed by the XRT and UVOT detectors on board the S wi f t satellite between March and December 2005. Aims. We are mainly interested in measuring the spectral parameters, and particularly the intrinsic curvature in the X-ray band. Methods. We perform X-ray spectral analysis of observed BL Lac TeV obj...
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ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 2015
ISSN: 1538-4357
DOI: 10.1088/0004-637x/799/1/7