Now showing items 689-708 of 784

    • T CrB: Radio Observations during the 2016–2017 "Super-active" State 

      Linford, Justin D.; Chomiuk, Laura; Sokoloski, Jennifer L.; Weston, Jennifer H. S.; Horst, Alexander J. van der; Mukai, Koji; Barrett, Paul; Mioduszewski, Amy J.; Rupen, Michael (The American Astronomical Society, 2019-10-07)
      We obtained radio observations of the symbiotic binary and known recurrent nova T Coronae Borealis following a period of increased activity in the optical and X-ray bands. A comparison of our observations with those made ...
    • TANAMI - Multiwavelength and Multimessenger Observations of Active Galaxies 

      Kadler, M.; Ojha, R.; TANAMI Collaboration (2015-07-08)
      Extragalactic jets launched from the immediate vicinity of supermassive black holes in radio-loud active galactic nuclei (AGN) are key objects in modern astronomy and astroparticle physics. AGN jets carry a fraction of the ...
    • TANAMI - Tracking Active Galactic Nuclei with Austral Milliarcsecond Interferometry 

      Muller, Cornelia; Kadler, Matthias; Ojha, Roopesh; Bock, M.; Booth, R.; Dutka, M. S.; Edwards, P. G.; Fey, A. L.; Fuhrmann, L.; Hase, H.; Horiuchi, S.; Hungwe, F.; Ros, E.; Taylor, G. B.; Thompson, D. J.; Tingay, S. J.; Tosti, G.; Tzioumis, A. K.; Wilms, J.; Zensus, J. A. (2010-01-18)
      We present a summary of the observation strategy of TANAMI (Tracking Active Galactic Nuclei with Austral Milliarcsecond Interferometry), a monitoring program to study the parsec-scale structure and dynamics of relativistic ...
    • TANAMI and RadioAstron observations of AGN 

      Edwards, Phil; Ojha, R.; Carpenter, B.; Kadler, M.; Kovalev, Y.; Voytsik, P.; Lisakov, M.; Phillips, C.; Stevens, J.; McCallum, J. (2014-08-07)
    • TANAMI blazars in the IceCube PeV-neutrino fields 

      Krauß, F.; Kadler, M.; Mannheim, K.; Schulz, R.; Trüstedt, J.; Wilms, J.; Ojha, R.; Ros, E.; Anton, G.; Baumgartner, W.; Beuchert, T.; Blanchard, J.; Bürkel, C.; Carpenter, B.; Eberl, T.; Edwards, P. G.; Eisenacher, D.; Elsässer, D.; Fehn, K.; Fritsch, U.; Gehrels, N.; Gräfe, C.; Grossberger, C.; Hase, H.; Horiuchi, S.; James, C.; Kappes, A.; Katz, U.; Kreikenbohm, A.; Kreykenbohm, I.; Langejahn, M.; Leiter, K.; Litzinger, E.; Lovell, J. E. J.; Müller, C.; Phillips, C.; Plötz, C.; Quick, J.; Steinbring, T.; Stevens, J.; Thompson, D. J.; Tzioumis, A. K. (EDP sciences, 2014-06-24)
      The IceCube Collaboration has announced the discovery of a neutrino flux in excess of the atmospheric background. Owing to the steeply falling atmospheric background spectrum, events at PeV energies most likely have an ...
    • TANAMI counterparts to IceCube high-energy neutrino events 

      Krauß, Felicia; Wang, Bingjie; Baxter, Claire; Kadler, Matthias; Mannheim, Karl; Ojha, Roopesh; Gräfe, Christina; Muller, Cornelia; Wilms, Joern; Carpenter, Bryce; Schulz, Robert; TANAMI Collaboration; Fermi-LAT Collaboration (arXiv, 2015-02-10)
      Since the discovery of a neutrino flux in excess of the atmospheric background by the IceCube Collaboration, searches for the astrophysical sources have been ongoing. Due to the steeply falling background towards higher ...
    • TANAMI monitoring of Centaurus A: The complex dynamics in the inner parsec of an extragalactic jet 

      Müller, C.; Kadler, M.; Ojha, R.; Perucho, M.; Grossberger, C.; Ros, E.; Wilms, J.; Blanchard, J.; Böck, M.; Carpenter, B.; Dutka, M.; Edwards, P. G.; Hase, H.; Horiuchi, S.; Kreikenbohm, A.; Lovell, J. E. J.; Markowitz, A.; Phillips, C.; Plötz, C.; Pursimo, T.; Quick, J.; Rothschild, R.; Schulz, R.; Steinbring, T.; Stevens, J.; Trüstedt, J.; Tzioumis, A. K. (EDP sciences, 2014-10-01)
      Context. Centaurus A (Cen A) is the closest radio-loud active galactic nucleus. Very Long Baseline Interferometry (VLBI) enables us to study the spectral and kinematic behavior of the radio jet-counterjet system on ...
    • The TANAMI Multiwavelength Program: Dynamic spectral energy distributions of southern blazars 

      Krauß, F.; Wilms, J.; Kadler, M.; Ojha, R.; Schulz, R.; Trüstedt, J.; Edwards, P. G.; Stevens, J.; Ros, E.; Baumgartner, W.; Beuchert, T.; Blanchard, J.; Buson, S.; Carpenter, B.; Dauser, T.; Falkner, S.; Gehrels, N.; Graefe, C.; Gulyaev, S.; Hase, H.; Horiuchi, S.; Kreikenbohm, I.; Langejahn, M.; Leiter, K.; Lovell, J. E. J.; Müller, C.; Natusch, T.; Nesci, R.; Pursimo, T.; Phillips, C.; Plötz, C.; Quick, J.; Tzioumis, A. K.; Weston, S. (EDP sciences, 2018-03-03)
      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 ...
    • The TANAMI Program 

      Müller, Cornelia; Kadler, Matthias; Ojha, Roopesh; Böck, M.; Booth, R.; Dutka, M. S.; Edwards, P.; Fey, A. L.; Fuhrmann, L.; Hase, H.; Horiuchi, S.; Jauncey, D.L.; Johnston, K.J.; Katz, U.; Lister, M.; Lovell, J.E.J.; Plötz, C.; Quick, J.F.H.; Ros, E.; Taylor, G.B.; Thompson, D.J.; Tingay, S.J.; Tosti, G.; Tzioumis, A.K.; Wilms, J.; Zensus, J.A. (AIP Publishing, 2010-07-22)
      TANAMI (Tracking Active Galactic Nuclei with Austral Milliarcsecond Interferometry) is a monitoring program to study the parsec-scale structures and dynamics of relativistic jets in active galactic nuclei (AGN) of the ...
    • The TANAMI Program: Southern-Hemisphere AGN on (Sub-)parsec Scales 

      Müller, Cornelia; Krauß, F.; Kadler, M.; Trüstedt, J.; Ojha, R.; Ros, E.; Wilms, J.; Böck, M.; Dutka, M.; Carpenter, B.; TANAMI collaboration (Proceedings of Science, 2012-10-09)
      The Southern Hemisphere VLBI monitoring program TANAMI provides dual-frequency (8 GHz and 22 GHz), milliarcsecond monitoring of extragalactic jets south of −30◦ declination. The TANAMI sample consists of a combined radio ...
    • TANAMI: Milliarcsecond Resolution Observations of Extragalactic Gamma-ray Sources 

      Ojha, Roopesh; Kadler, M.; Böck, M.; Booth, R.; Dutka, M. S.; Edwards, P. G.; Fey, A. L.; Fuhrmann, L.; Gaume, R. A.; Hase, H.; Horiuchi, S.; Jauncey, D.L.; Johnston, K. J.; Katz, U.; Lister, M.; Lovell, J. E. J.; Müller, C.; Plötz, C.; Quick, J. F. H.; Ros, E.; Taylor, G. B.; Thompson, D. J.; Tingay, S. J.; Tosti, G.; Tzioumis, A. K.; Wilms, J.; Zensus, J. A. (arXiv, 2009-12-31)
      The TANAMI (Tracking AGN with Austral Milliarcsecond Interferometry) and associated programs provide comprehensive radio monitoring of extragalactic gamma-ray sources south of declination -30 degrees. Joint quasi-simultaneous ...
    • TANAMI: tracking active galactic nuclei with austral milliarcsecond interferometry 

      Ojha, R.; Kadler, M.; Böck, M.; Booth, R.; Dutka, M. S.; Edwards, P. G.; Fey, A. L.; Fuhrmann, L.; Gaume, R. A.; Hase, H.; Horiuchi, S.; Jauncey, D. L.; Johnston, K. J.; Katz, U.; Lister, M.; Lovell, J. E. J.; Müller, C.; Plötz, C.; Quick, J. F. H.; Ros, E.; Taylor, G. B.; Thompson, D. J.; Tingay, S. J.; Tosti, G.; Tzioumis, A. K.; Wilms, J.; Zensus, J. A. (EDP sciences, 2010-09-10)
      Context. A number of theoretical models vie to explain the γ-ray emission from active galactic nuclei (AGN). This was a key discovery of EGRET. With its broader energy coverage, higher resolution, wider field of view and ...
    • TANAMI: Tracking Active Galactic Nuclei with Austral Milliarcsecond Interferometry⋆ 

      Müller, C.; Kadler, M.; Ojha, R.; Schulz, R.; Trüstedt, J.; Edwards, P. G.; Ros, E.; Carpenter, B.; Angioni, R.; Blanchard, J.; Böck, M.; Burd, P. R.; Dörr, M.; Dutka, M. S.; Eberl, T.; Gulyaev, S.; Hase, H.; Horiuchi, S.; Katz, U.; Krauß, F.; Lovell, J. E. J.; Natusch, T.; Nesci, R.; Phillips, C.; Plötz, C.; Pursimo, T.; Quick, J. F. H.; Stevens, J.; Thompson, D. J.; Tingay, S. J.; Tzioumis, A. K.; Weston, S.; Wilms, J.; Zensus, J. A. (EDP sciences, 2018-02-07)
      Context. TANAMI is a multiwavelength program monitoring active galactic nuclei (AGN) south of − 30° declination including high-resolution very long baseline interferometry (VLBI) imaging, radio, optical/UV, X-ray, and γ-ray ...
    • Temperature calibration of the E and B Experiment 

      Aubin, François; Aboobaker, Asad M.; Bao, Chaoyun; Geach, Christopher; Helson, Kyle; et al (World Scientific, 2017)
      The E and B Experiment (EBEX) is a balloon-borne polarimeter designed to measure the polarization of the cosmic microwave background radiation and to characterize the polarization of galactic dust. EBEX was launched December ...
    • TES pixel optimization for the ATHENA X-IFU instrument 

      Wakeham, Nicholas; Adams, J. S.; Bandler, S.; Beaumont, S.; Miniussi, Antoine; Sakai, Kazuhiro; Smith, Stephen J.; et al (2019-07-22)
      ATHENA is a European led x-ray observatory due for launch in the early 2030s. The X-ray Integral Field Unit (X-IFU) instrument on ATHENA will have an array of 3168 TES microcalorimeters, 2.5 eV resolution (at 7 keV), 5 arc ...
    • A test platform for the detection and readout chain for the Athena X-IFU 

      Betancourt-Martinez, Gabriele; Pajot, François; Beaumont, Sophie; Roudil, Gilles; Miniussi, Antoine; Sakai, Kazuhiro; Smith, Stephen; Wakeham, Nicholas; et al (2021-07-07)
      We present a test platform for the Athena X-IFU detection chain, which will serve as the first demonstration of the representative end-to-end detection and readout chain for the X-IFU, using prototypes of the future ...
    • Tests of General Relativity and Fundamental Physics with Space-based Gravitational Wave Detectors 

      Berti, Emanuele; Barausse, Enrico; Cholis, Ilias; Garcia-Bellido, Juan; Holley-Bockelmann, Kelly; Hughes, Scott A.; Kelly, Bernard; Kovetz, Ely D.; Littenberg, Tyson B.; Livas, Jeffrey; Mueller, Guido; Natarajan, Priya; Shoemaker, David H.; Shoemaker, Deirdre; Schnittman, Jeremy D.; Vallisneri, Michele; Yunes, Nicolas (2019-03-07)
      Low-frequency gravitational-wave astronomy can perform precision tests of general relativity and probe fundamental physics in a regime previously inaccessible. A space-based detector will be a formidable tool to explore ...
    • Thermal Crosstalk Measurements and Simulations for an X-ray Microcalorimeter Array 

      Miniussi, Antoine R.; Adams, Joseph S.; Bandler, Simon R.; Beaumont, Sophie; Chang, Meng P.; Chervenak, James A.; Finkbeiner, Fred M.; Ha, Jong Y.; Hummatov, Ruslan; Kelley, Richard L.; Kilbourne, Caroline A.; Porter, Frederick S.; Sadleir, John E.; Sakai, Kazuhiro; Smith, Stephen J.; Wakeham, Nicholas A.; Wassell, Edward J. (Springer, 2020-01-18)
      Arrays of high-density microcalorimeters require careful heat sinking in order to minimize the thermal crosstalk between nearby pixels. For the array of microcalorimeters developed for the Athena X-ray Integral Field Unit ...
    • Thermal fluctuation noise in Mo/Au superconducting transition-edge sensor microcalorimeters 

      Wakeham, Nicholas; Adams, J. S.; Bandler, S. R.; Beaumont, S.; Chervenak, J. A.; Datesman, A. M.; Eckart, M. E.; Finkbeiner, F. M.; Hummatov, R.; Kelley, R. L.; Kilbourne, C. A.; Miniussi, Antoine; Porter, F. S.; Sadleir, J. E.; Sakai, Kazuhiro; Smith, S. J.; Wassell, E. J. (AIP, 2019-04-23)
      In many superconducting transition-edge sensor (TES) microcalorimeters, the measured electrical noise exceeds theoretical estimates based on a thermal model of a single body thermally connected to a heat bath. Here, we ...
    • Thermal Impact of Cosmic Ray Interaction with an X-Ray Microcalorimeter Array 

      Miniussi, Antoine R.; Adams, Joseph S.; Bandler, Simon R.; Beaumont, Sophie; Chang, Meng P.; Chervenak, James A.; Finkbeiner, Fred M.; Ha, Jong Y.; Hummatov, Ruslan; Kelley, Richard L.; Kilbourne, Caroline A.; Porter, Frederick S.; Sadleir, John E.; Sakai, Kazuhiro; Smith, Stephen J.; Wakeham, Nicholas A.; Wassell, Edward J. (Springer Nature Switzerland AG., 2020-02-13)
      The X-ray Integral Field Unit (X-IFU) instrument on the Athena mission will be positioned at the Lagrangian point L2 and be subject to cosmic rays generated by astrophysics sources, primarily relativistic protons. Previous ...