A redshifted Kalpha line from the peculiar gamma-ray source PMN J1603-4904
Abstract
We present the latest results on the bright hard-spectrum gamma-ray source PMN J1603-4904, observed in the framework of the multiwavelength monitoring program TANAMI. High-resolution radio observations reveal a symmetric brightness distribution with the brightest, most compact component at the center of the emission region. Its broadband spectral energy distribution and other multiwavelength properties point to a very atypical blazar. Here, we focus on recent XMM-Newton and Suzaku observations. We detect a narrow iron line which allows for a first measurement of the redshift of the system (z∼ 0.18) and further challenges the earlier blazar classification. This result suggests that the source is observed at a larger angle to the line of sight than expected for blazars, and thus the source would add to the elusive class of gamma-ray loud misaligned-jet objects, possibly a gamma-ray bright young radio galaxy.
- Publication:
-
The Extremes of Black Hole Accretion
- Pub Date:
- July 2015
- Bibcode:
- 2015ebha.confE.105M