Yasuhide Ishihara

Data analysis environment (DASH2000) for the Subaru telescope

New framework of data analysis system (DASH) has been developed for the SUBARU Telescope. It is designed using object-oriented methodology and adopted a restaurant model. DASH shares the load of CPU and I/O among distributed heterogeneous computers. The distributed object environment of the system is implemented with JAVA and CORBA. DASH has been evaluated by several prototypings. DASH2000 is the latest version, which will be released as the beta version of data analysis system for the SUBARU Telescope.

Observation data set of the Subaru observation software system

An observation data set (OD) has an important role in Subaru Observation Software System in order to connect the observation control system with the data analysis system. OD includes abstract commands of getting both a science object data and its calibration data indispensable to calibration. Acquisition conditions of each calibration data are also defined in the OD. The observation schedule may be optimized and re-arranged using the OD during the observation in scheduling mode. In the manual operation mode, indication of the next observation command may be given through the OD. The OD is used for automated data analysis, such as pipeline processing, in the data analysis system in the base facility in Hilo, Hawaii. Feedback of the control parameters and real-time quality assessment of the acquired data to observation scheduling will be achieved using the supercomputer system at Hilo in a few years.

Study on the environment around QSOs with redshift of 1–3 using the JVO System

Yuji Shirasaki1, Masahiro Tanaka1, Satoshi Honda1, Satoshi Kawanomoto1, Yoshihiko Mizumoto1, Masatoshi Ohishi1, Naoki Yasuda2, Yoshifumi Masunaga3, Yasuhide Ishihara4, Jumpei Tsutsumi4, Hiroyuki Nakamoto5, Yuusuke Kobayashi5 and Michito Sakamoto5 National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka Tokyo, 181-8588 Japan University of Tokyo, 5-1-5 Kashiwa-no-Ha, Kashiwa Chiba 277-8582, Japan Ochanomizu Univerisity, 2-1-1 Otsuka Bunkyo-ku, Tokyo 112-8610, Japan Fujitsu Ltd., 4-1-1 Kamikodanaka Nakahara-ku, Kawasaki 211-8588, Japan Systems Engineering Consultants Co. Ltd., 22-4 Sakuraoka-cho Shibuya-ku, Tokyo 150-0031, Japan

Japanese Virtual Observatory (JVO) as an advanced astronomical research environment

We present the design and implementation of the Japanese Virtual Observatory (JVO) system. JVO is a portal site to various kinds of astronomical resources distributed all over the world. We have developed five components for constructing the portal: (1) registry, (2) data service, (3) workflow system, (4) data analysis service (5) portal GUI. Registry services are used for publishing and searching data services in the VO, and they are constructed using an OAI-PMH metadata harvesting protocol and a SOAP web service protocol so that VO standard architecture is applied. Data services are developed based on the Astronomical Data Query Language (ADQL) which is an international VO standard and an extension of the standard SQL. The toolkit for building the ADQL-based service is released to the public on the JVO web site. The toolkit also provides the protocol translation from a Simple Image Access Protocol (SIAP) to ADQL protocol, so that both the VO standard service can be constructed using our toolkit. In order to federate the distributed databases and analysis services, we have designed a workflow language which is described in XML and developed execution system of the workflow. We have succeeded to connect to a hundred of data resources of the world as of April 2006. We have applied this system to the study of QSO environment by federating a QSO database, a Subaru Suprim-Cam database, and some analysis services such a SExtractor and HyperZ web services. These experiences are described is this paper.We present the design and implementation of the Japanese Virtual Observatory (JVO) system. JVO is a portal site to various kinds of astronomical resources distributed all over the world. We have developed five components for constructing the portal: (1) registry, (2) data service, (3) workflow system, (4) data analysis service (5) portal GUI. Registry services are used for publishing and searching data services in the VO, and they are constructed using an OAI-PMH metadata harvesting protocol and a SOAP web service protocol so that VO standard architecture is applied. Data services are developed based on the Astronomical Data Query Language (ADQL) which is an international VO standard and an extension of the standard SQL. The toolkit for building the ADQL-based service is released to the public on the JVO web site. The toolkit also provides the protocol translation from a Simple Image Access Protocol (SIAP) to ADQL protocol, so that both the VO standard service can be constructed using our toolkit. In order to federate the distributed databases and analysis services, we have designed a workflow language which is described in XML and developed execution system of the workflow. We have succeeded to connect to a hundred of data resources of the world as of April 2006. We have applied this system to the study of QSO environment by federating a QSO database, a Subaru Suprim-Cam database, and some analysis services such a SExtractor and HyperZ web services. These experiences are described is this paper.

Prototype of distributed analysis software hierarchy for the Subaru Telescope

We are developing a data reduction and analysis system DASH for efficient data processing of the SUBARU telescope. We adopted CORBA as a distributed object environment and Java for a user interface in the prototype of DASH. Moreover, we introduced a data reduction procedure cube as a kind of visual procedure script.