• The AUSTRAL VLBI Observing Program

      Weston, S; Plank, L; Lovell, J; McCallum, J; Mayer, D; Reynolds, C; Quick, J; Weston, S; Titov, O; Shabala, S; Bohm, J; Natusch, T; Nickola, M; Gulyaev, S (Springer Journals, 2016)
      The AUSTRAL observing program was started in 2011, performing geodetic and astrometric very long baseline interferometry (VLBI) sessions using the new Australian AuScope VLBI antennas at Hobart, Katherine, and Yarragadee, ...
    • Collaboration and development of radio astronomy in Australasia and South-Pacific region: New Zealand perspectives

      Gulyaev, S; Natusch, T (Cambridge University Press, 2007)
      As a result of collective efforts of an Australian–New Zealand VLBI team, the first New Zealand VLBI system was developed, and a series of test observations between New Zealand and Australia conducted. The equipment and ...
    • Contribution of Warkworth 12m VLBI radio telescope to New Zealand geodesy

      Takiguchi, H; Gulyaev, S; Natusch, T; Weston, S; Woodburn, L (The Geoscience Society of New Zealand, 2011)
      The Institute for Radio Astronomy and Space Research (IRASR) of Auckland University of Technology (AUT) launched the New Zealand's first and only research capable radio telescope (WARK12M) near Warkworth which is located ...
    • Conversion of New Zealand's 30m telecommunication antenna into a radio telescope

      Woodburn, L; Natusch, T; Weston, S; Thomasson, P; Godwin, M; Gulyaev, S (Astronomical Society of Australia, 2014)
      We describe our approach to the conversion of a former 100-foot (30-m) telecommunication antenna in New Zealand into a radio telescope. We provide the specifications of the Earth Station and identify the priorities for the ...
    • Design of an X-Band Feed System for the Auckland University of Technology 30m Diameter Warkworth Radio Telescope

      Granet, C; Kot, JS; Natusch, T; Weston, S; Gulyaev, S (IEEE, 2017)
      An innovative way to nest a new X-band feed system inside an existing C-band feed system is proposed.
    • First Scientific VLBI Observations Using New Zealand 30 Metre Radio Telescope Wark30m

      Petrov, L; Natusch, T; Weston, S; McCallum, J; Ellingsen, S; Gulyaev, S (IOP Publishing, 2015)
      We report the results of a successful 24 hour 6.7 GHz VLBI experiment using the 30 meter radio telescope WARK30M near Warkworth, New Zealand, recently converted from a radio telecommunications antenna, and two radio ...
    • Planetary Radio Interferometry and Doppler Experiment (PRIDE) Technique: A Test Case of the Mars Express Phobos Fly-by

      Gulyaev, S; Natusch, T; Weston, S (ESO, 2016)
      Context. The closest ever fly-by of the Martian moon Phobos, performed by the European Space Agency’s Mars Express spacecraft, gives a unique opportunity to sharpen and test the Planetary Radio Interferometry and Doppler ...
    • 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 ...
    • Towards synergy of VLBI and GNSS geodetic techniques in geologically dynamic New Zealand

      Takiguchi, H; Gulyaev, S; Natusch, T; Weston, S; Woodburn, L (Asia Oceania Geosciences Society (AOGS), 2011)
      Though the New Zealand Geodetic Datum 2000 (NZGD2000) is based on and closely matches the International Terrestrial Reference System (ITRS) through the International Terrestrial Reference Frame (ITRF), it is not a dynamic ...
    • Warkworth 12-m VLBI Station: WARK12M

      Gulyaev, S; Natusch, T; Weston, S; Collett, D; Palmer, N (AUT University; NASA Technical Publication, 2011)
      This report summarizes the geodetic VLBI activities in New Zealand in 2010. It provides geographical and technical details of WARK12M - the new IVS network station operated by the Institute for Radio Astronomy and Space ...