Astronomy and Astrophysics – Astronomy
Scientific paper
Aug 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995apj...449..567s&link_type=abstract
Astrophysical Journal v.449, p.567
Astronomy and Astrophysics
Astronomy
24
Gamma Rays: Theory, Galaxies: Bl Lacertae Objects: Individual Alphanumeric: Pks 2005-489, Radiation Mechanisms: Nonthermal, X-Rays: Galaxies
Scientific paper
Two deep ROSA T PSPC observations of the X-ray-bright BL Lac object PKS 2005-489 have yielded high signal-to-noise spectra with a total of 18,900 and 31,000 counts. The 0.2-2.0 keV spectrum is rather steep, with a photon index around 3.0 at both epochs. The X-ray flux decreased by a factor of 2 in 6 months, accompanied by a steepening of the spectrum. Analysis of the broadband energy distribution shows that the continuum emission of PKS 2005-489 peaks at ≍ 1016 Hz and that spectral variability is greater above the peak. The application of synchrotron self-Compton models indicates that large magnetic energy densities dominate the emission region in PKS 2005-489 and that the observed variability may be the result of a variable electron energy and density. The models predict the largest variability in the γ-ray band, where the source was recently detected by the Gamma Ray Observatory (GRO).
Ghisellini Gabriele
Maraschi Laura
Sambruna Rita M.
Urry Claudia Megan
No associations
LandOfFree
Spectral Variability of the X-Ray--bright BL Lacertae Object PKS 2005-489 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Spectral Variability of the X-Ray--bright BL Lacertae Object PKS 2005-489, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Spectral Variability of the X-Ray--bright BL Lacertae Object PKS 2005-489 will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1269302