Variable X-ray spectra of BL Lacertae objects - HEAO 1 observations of PKS 0548 - 322 and 2A 1219 + 305

Details Variable X-ray spectra of BL Lacertae objects - HEAO 1 observations of PKS 0548 - 322 and 2A 1219 + 305 Variable X-ray spectra of BL Lacertae objects - HEAO 1 observations of PKS 0548 - 322 and 2A 1219 + 305

Jan 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981apj...243...53w&link_type=abstract

Astrophysical Journal, Part 1, vol. 243, Jan. 1, 1981, p. 53-59.

Astronomy and Astrophysics

Astronomy

73

Bl Lacertae Objects, Galactic Nuclei, Variability, X Ray Sources, X Ray Spectra, Heao 1, Radio Sources (Astronomy), Spectral Bands, Synchrotron Radiation, Ultraviolet Radiation

Scientific paper

We present X-ray spectra for the BL Lac objects PKS 0548-322 and 2A 1219+305 measured with the HEAO 1 A-2 detectors during pointing maneuvers on 1978 September 30 and 1978 May 31, respectively. Both fit single power-law components with low-energy absorption. For 2A 1219+305, a thermal bremsstrahlung form gives an unacceptable fit. We find, from a comparison with other statistically poorer observations taken at 6 month intervals while the satellite was in its normal scanning mode, that the sources exhibit spectral variability. A summary of measurements of the five BL Lac objects detected with the A-2 experiment is presented, and we conclude that X-ray spectral changes in this class of source are common. Their general X-ray spectral characteristics distinguish BL Lac objects from other classes of X-ray-emitting active galactic nuclei. Analysis of their total spectra indicates that most of the energy is emitted in the 5-100 eV band.

Affiliated with

Also associated with

No associations

Rating

Variable X-ray spectra of BL Lacertae objects - HEAO 1 observations of PKS 0548 - 322 and 2A 1219 + 305 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 Variable X-ray spectra of BL Lacertae objects - HEAO 1 observations of PKS 0548 - 322 and 2A 1219 + 305, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Variable X-ray spectra of BL Lacertae objects - HEAO 1 observations of PKS 0548 - 322 and 2A 1219 + 305 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1051388