Suzaku Observations of Extreme MeV Blazar SWIFT J0746.3+2548

Kavli Affiliate: Roger Romani

| First 5 Authors: Shin Watanabe, Rie Sato, Tadayuki Takahashi, Jun Kataoka, Greg Madejski

| Summary:

We report the Suzaku observations of the high luminosity blazar SWIFT
J0746.3+2548 (J0746) conducted in November 2005. This object, with z = 2.979,
is the highest redshift source observed in the Suzaku Guaranteed Time Observer
(GTO) period, is likely to show high gamma-ray flux peaking in the MeV range.
As a result of the good photon statistics and high signal-to-noise ratio
spectrum, the $Suzaku$ observation clearly confirms that J0746 has an extremely
hard spectrum in the energy range of 0.3-24 keV, which is well represented by a
single power-law with a photon index of 1.17 and Galactic absorption. The
multiwavelength spectral energy distribution of J0746 shows two continuum
components, and is well modeled assuming that the high-energy spectral
component results from Comptonization of the broad-line region photons. In this
paper we search for the bulk Compton spectral features predicted to be produced
in the soft X-ray band by scattering external optical/UV photons by cold
electrons in a relativistic jet. We discuss and provide constraints on the pair
content resulting from the apparent absence of such features.

| Search Query: ArXiv Query: search_query=au:”Roger Romani”&id_list=&start=0&max_results=10

Read More

Leave a Reply