Rapid X ray variability in BL Lacertae objects

Details Rapid X ray variability in BL Lacertae objects Rapid X ray variability in BL Lacertae objects

Nov 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989esasp.296..831b&link_type=abstract

In its The 23rd ESLAB Symposium on Two Topics in X Ray Astronomy. Volume 2: AGN and the X Ray Background p 831-835 (SEE N90-2584

Astronomy and Astrophysics

Astronomy

1

Bl Lacertae Objects, Light Curve, Variability, X Ray Spectra, Exosat Satellite, Red Shift, Satellite Observation, Spectrum Analysis

Scientific paper

A study of the short timescale X-ray variability of BL Lacertae objects is performed using the EXOSAT archive. Two hundred and one observations of 36 BL Lacertae objects revealed rapid variability in 21 observations of eight objects. Evidence for relativistic bulk motions is found in only one source PKS2155-304; 1E1402.3+0416 is also a candidate, its redshift being unknown. The other variable BL Lac objects exhibited less variations. Pronounced spectral changes were found, with the sources being harder when the intensity is higher.

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