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The unusual multiwavelength properties of the gamma-ray source PMNJ1603-4904
Cornelia Müller, M. Kadler, R. Ojha +27
We investigate the nature and classification of PMNJ1603-4904, a bright radio source close to the Galactic plane, which is associated with one of the brightest hard-spectrum gamma-…
Multi-Wavelength Observations of PKS 2142-75 during Active and Quiescent Gamma-Ray States
Michael Dutka, Roopesh Ojha, Katja Pottschmidt +13
PKS2142-75 (a.k.a. 2FGL J2147.4-7534) is a flat-spectrum radio quasar that was observed quasi-simultaneously by a suite of instruments across the elec- tromagnetic spectrum during…
The effects of frequency-dependent quasar variability on the celestial reference frame
Stanislav Shabala, Jonathan Rogers, Jamie McCallum +4
We examine the relationship between source position stability and astrophysical properties of radio-loud quasars making up the International Celestial Reference Frame. Understandin…