2003 Fiscal Year Final Research Report Summary
Development of Survey and Follow-up System for Transient Astronomical Objects
| Project/Area Number |
13640239
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Astronomy
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| Research Institution | KYOTO UNIVERSITY |
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Principal Investigator |
KATO Taichi Graduate School of Science, Kyoto University, Research Associate, 大学院・理学研究科, 助手 (20283591)
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| Co-Investigator(Kenkyū-buntansha) |
YAMAOKA Hitoshi Faculty of Science, Kyushu University, Research Associate, 大学院・理学研究院, 助手 (70243855)
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| Project Period (FY) |
2001 – 2003
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| Keywords | transient objects / gamma-ray bursts / cataclysmic variables / supernovae / novae / black holes / accretion disks / variable stars |
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| Research Abstract |
This research aims to understand the physics of active phenomena in astronomy, through observational study of "transient astronomical objects", which include optical counterparts of gamma-ray bursts, X-ray transients harboring black holes, and cataclysmic variables. These objects show very rapid (tens of seconds to days) variations and are becoming a matter of contemporary astrophysical interest.
In recent years, these objects have been shown to exhibit unexpected variations even in the optical light. In this research, we undertook a comprehensive approach to develop a dedicated observing system for transient objects, to establish the analysis technique, and to maintain the world-wide network (VSNET) as a world center for transient object astronomy. We installed an automated dome in Kyoto University, and a 25-cm telescope and a CCD camera in Kyushu University. In combination with the existing apparatus, we succeeded to produce a rich scientific outcome, and published a great number of s
… More
olid papers.
Representative scientific results include:
(1) We discovered giant, rapid optical variations in V4641 Sgr, the black-hole X-ray transient whose unique nature was first recognized by our discovery of a giant optical outburst in 1999. The discovery of rapid optical variations in this system has brought a possibility to directly "see" the neighborhood of a black hole.
(2) We published a Nature paper on GRB 030329, which was widely communicated in, domestic and international press materials. This burst brought a major turning point in modern research of gamma-ray bursts. The early observation and rapid release of information via VSNET greatly contributed to globally enhance the observation strategies of GRBs.
(3) We published a special issue (on VSNET) of the Publication of Astronomical Society of Japan. This issue included a review paper on the history, scientific achievements, and novel strategies to create VSNET. The issue also includes many original research papers. This is an epoch-making publication in the research history of transient objects, and will widely be referenced by the relevant researchers. Less
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Research Products
(12 results)
