OSSE Observations of the Bright Seyfert 1 Galaxy IC 4329A

Details OSSE Observations of the Bright Seyfert 1 Galaxy IC 4329A OSSE Observations of the Bright Seyfert 1 Galaxy IC 4329A

Oct 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993apj...416l..57f&link_type=abstract

Astrophysical Journal Letters v.416, p.L57

Astronomy and Astrophysics

Astronomy

11

Galaxies: Individual Alphanumeric: Ic 4329A, Galaxies: Seyfert, Gamma Rays: Observations, Gamma Rays: Theory

Scientific paper

We present the first hard X-ray/soft γ-ray observations from the Oriented Scintillation Spectrometer Experiment (OSSE) of a bright Seyfert 1 galaxy, IC 4329A. Significant variability was seen over the 3 week observing period. The 50-200 keV spectrum is steep and can be characterized by a power-law spectrum of photon index 2.84 +/- 0.36, at 90% confidence. This is significantly steeper than the X-ray spectrum found from Ginga data of the source. Joint fits of the Ginga and OSSE data are well modeled by a thermal model represented by an exponential spectral break with an e-folding energy at about 130 keV. Good fits are also obtained if a reflection component is included. We constrain possible nonthermal continuum models involving photon-photon pair production. There is a similarity between the X-ray/γ-ray spectra of IC 4329A and Cygnus X-1.

Affiliated with

Also associated with

No associations

Rating

OSSE Observations of the Bright Seyfert 1 Galaxy IC 4329A 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 OSSE Observations of the Bright Seyfert 1 Galaxy IC 4329A, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and OSSE Observations of the Bright Seyfert 1 Galaxy IC 4329A will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1325374