On the hard X-ray variability of Centaurus A

Details On the hard X-ray variability of Centaurus A On the hard X-ray variability of Centaurus A

Aug 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993apj...412..586j&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 412, no. 2, p. 586-592.

Astronomy and Astrophysics

Astronomy

21

Emission Spectra, Light Curve, Radio Galaxies, X Ray Astronomy, Gamma Ray Astronomy, Power Spectra, Variability

Scientific paper

Observations of the radio galaxy Centaurus A performed by the SIGMA imaging telescope on board the GRANAT satellite on three occasions during a 1-yr period are reported. Hard X-ray emission was detected each time at a position compatible with the position of the galaxy and from no other source in the region. A flux increase by a factor of 3 over a 1-yr time scale is found. If due to a flaring event, the duration of a typical event is 8-10 days (rise and decay time) with a frequency of about 45 events per year. The amount of energy involved is enormous, as photons from a few keV to a few hundred keV are involved in the intensity variation (about 3 x 10 exp 42 ergs/s), and the region responsible for the process is probably the nucleus of the galaxy.

Affiliated with

Also associated with

No associations

Rating

On the hard X-ray variability of Centaurus A 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 On the hard X-ray variability of Centaurus A, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and On the hard X-ray variability of Centaurus A will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1491001