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e-VLBI observations of GRB 080409 afterglow with an Australasian radio telescope network

Research in Astronomy and Astrophysics 2016年第11期16卷 1-6页

作者： Aquib Moin Philip G. Edwards Steven J. Tingay Chris J. Phillips Anastasios K. Tzioumis Shaun W. Amy Tao An mamoru sekido Zhong-Xiang Wang Physics Department United Arab Emirates University RO. Box 15551 A1-Ain United Arab Emirates Shanghai Astronomical Observatory Chinese Academy of Sciences Shanghai 200030 China International Centre for Radio Astronomy Research Curtin University Bentley WA Australia CSIRO Astronomy and Space Science P.O. Box 76 Epping NSW 2121 Australia Kashima Space Research Center National Institute of Information and Communications Technology (NICT) 893-1 Hirai Kashima 314-0014 Ibaraki Japan Key Laboratory of Radio Astronomy Chinese Academy of Sciences Nanjing 210008 China Osservatorio di Radio Astronomia Istituto Nazionale di Astrofisica Italy

Transcontinental e-VLBI observations were conducted in June 2008 with telescopes in Australia, China and Japan. Detections were made of the radio-loud quasar PKS B0727-115, which shows superlu- minal motion, and the intra-day variable quasar PKS B0524＋034. The latter source was used as a phase reference calibrator for observations at the position of the gamma-ray burst GRB 080409, for which an upper limit to the radio emission is set. Australia Telescope Compact Array data were also used to derive a limit on the radio flux density of the GRB afterglow. These observations demonstrate the capability to form a large Australasian radio telescope network for e-VLBI, with data transported and processed in realtime over high capacity networks. This campaign represents the first step towards more regular e-VLBI observations in this region.

关键词： techniques: interferometric -- galaxies: active -- gamma rays: bursts

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Astrometric VLBI Observation of Spacecraft with Phase Delay

Astrometric VLBI Observation of Spacecraft with Phase Delay

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作者： mamoru sekido Ryuichi Ichikawa Hiro Osaki Tetsuro Kondo Yasuhiro Koyama Makoto Yoshikawa Takafumi Ohnishi Wayne Cannon Alexander Novikov Mario Berube National Institute of Information and Communications Technology Kashima Space Research Center 893-1 Hirai Kashima Ibaraki 314-8501 Japan National Institute of Information and Communications Technology Kashima Space Research Center 893-1 Hirai Kashima Ibaraki 314-8501 Japan National Institute of Information and Communications Technology Kashima Space Research Center 893-1 Hirai Kashima Ibaraki 314-8501 Japan National Institute of Information and Communications Technology Kashima Space Research Center 893-1 Hirai Kashima Ibaraki 314-8501 Japan National Institute of Information and Communications Technology Kashima Space Research Center 893-1 Hirai Kashima Ibaraki 314-8501 Japan Institute of Space and Astronautical Sciences/JAXA 3-1-1 Yoshinodai Sagamihara Kanagawa 229-8510 Japan Advanced Science Solutions Group/Fujitsu Limited. 4-1-1 Kamikodanaka Nakahara-ku Kawasaki Kanagawa 211-8588 Japan Space Geodynamics Laboratory Department of Physics and Astronomy York University 4700 Keele Street Toronto Ontario M3J 1P3 Canada Space Geodynamics Laboratory Department of Physics and Astronomy York University 4700 Keele Street Toronto Ontario M3J 1P3 Canada Geodetic Survey Division/Natural Resources Canada 615 Booth Street Room 440 Ottawa OntarioK1A 0E9 Canada.

A series of VLBI observations for spacecraft NOZOMI was performed in the period between the end of 2002 and July 2003 with aim of supporting the orbit determi- nation. We have made astrometric anal

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