Browsing Open Research by Author "Stevens, J"

Now showing items 1-4 of 4

    • Potential Kick Velocity Distribution of Black Hole X-ray Binaries and Implications for Natal Kicks

      Atri, P; Miller-Jones, JCA; Bahramian, A; Plotkin, RM; Jonker, PG; Nelemans, G; Maccarone, TJ; Sivakoff, GR; Deller, AT; Chaty, S; Torres, MAP; Horiuchi, S; McCallum, J; Natusch, T; Phillips, CJ; Stevens, J; Weston, S
      We use Very Long Baseline Interferometry to measure the proper motions of three black hole X-ray binaries (BHXBs). Using these results together with data from the literature and Gaia-DR2 to collate the best available ...

    • Spica and the Annual Cycle of PKS B1322-110 Scintillations

      Bignall, H; Reynolds, C; Stevens, J; Bannister, K; Johnston, S; Tuntsov, AV; Walker, MA; Gulyaev, S; Natusch, T; Weston, S; Md Said, NM; Kratzer, M (Oxford University Press (OUP), 2019)
      PKS B1322–110 is a radio quasar that is located only 8.′5 in angular separation from the bright B star Spica. It exhibits intraday variability in its flux density at GHz frequencies attributed to scintillations from plasma ...

    • The TANAMI Multiwavelength Program: Dynamic SEDs of Southern Blazars

      Krauß, F; Wilms, J; Kadler, M; Ojha, R; Schulz, R; Trüstedt, J; Edwards, PG; Stevens, J; Ros, E; Baumgartner, W; Beuchert, T; Blanchard, J; Buson, S; Carpenter, B; Dauser, T; Falkner, S; Gehrels, N; Gräfe, C; Gulyaev, S; Hase, H; Horiuchi, S; Kreikenbohm, A; Kreykenbohm, I; Langejahn, M; Leiter, K; Lovell, JEJ; Müller, C; Natusch, T; Nesci, R; Pursimo, T; Phillips, C; Plötz, C; Quick, J; Tzioumis, AK; Weston, S (EDP Sciences, 2016)
      Context. Simultaneous broadband spectral and temporal studies of blazars are an important tool for investigating active galactic nuclei (AGN) jet physics. Aims. We study the spectral evolution between quiescent and flaring ...

    • TANAMI: Tracking Active Galactic Nuclei with Austral Milliarcsecond Interferometry - II. Additional Sources

      Muller, C; Kadler, M; Ojha, R; Schulz, R; Trustedt, J; Edwards, PG; Ros, E; Carpenter, B; Angioni, R; Blanchard, J; Bock, M; Burd, PR; Dorr, M; Dutka, MS; Eberl, T; Gulyaev, S; Hase, H; Horiuchi, S; Katz, U; Krauss, F; Lovell, JEJ; Natusch, T; Nesci, R; Phillips, C; Plotz, C; Pursimo, T; Quick, JFH; Stevens, J; Thompson, DJ; Tingay, SJ; Tzioumis, AK; Weston, S; Wilms, J; Zensus, JA (EDP Sciences, 2017)
      Context. TANAMI is a multiwavelength program monitoring active galactic nuclei (AGN) south of −30◦ declination including highresolution Very Long Baseline Interferometry (VLBI) imaging, radio, optical/UV, X-ray and γ-ray ...