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Astronomical Data Analysis Software and Systems XIII ASP Conference Series, Vol. 314, 2004 F. Ochsenbein, M. Al len, and D. Egret, eds.

Korean Astronomical Data Center Prototyp e Release
Hyun-il Sung, Sang Chul Kim, In Sung Yim, Hyun-Woong Nam, Bong Gyu Kim, Jongsoo Kim, & Dong-Joo Lee Korea Astronomy Observatory, Taejon 305-348, Republic of Korea, Email: hisung@kao.re.kr Abstract. The prototype version of the Korean Astronomical Data Center (KADC)'s database server is presented. The first dataset is from the Bohyunsan Optical Astronomy Observatory (BOAO)'s 1.8m optical telescope. The total amount of the data is about 400 GB and these data are obtained during 1997 Sep ­ 2002 Dec by using 1K CCD, 2K CCD, and medium-dispersion spectrograph. The prototype version of KADC database has two modes for the users : (i) user can look through the list of titles of observing runs, observation logs, and parameters of each FITS files, and (ii) user can search data by typing ob ject name, coordinates and search box size, etc. The FITS format files for target objects together with all accompanying files for processing can be obtained. In KADC database, the search process is being operated by SQL using metadata-table which contains information of FITS header parameters. This archive is the first astronomical database made in Korea, which will be expanded for the Taeduk 14m radio telescope data and future pro jects such as Korean VLBI Network (KVN, to be completed in 2007) and 8mclass large optical telescope which is currently being designed.

1.

Introduction

The Korean Astronomical Data Center (KADC)1 was established in 2002 as a new department in Korea Astronomy Observatory (KAO)2 , the national observatory of the Republic of Korea, and has performed the principal axis in giving birth to the Korean Virtual Observatory (KVO)3 in February 2003 (Kim et al. 2003). As a first mission of the KADC/KVO, we are building databases of astronomical data produced by telescopes in Korea. In this paper, we introduce the prototype version of KADC using the Bohyunsan Optical Astronomy Observatory (BOAO)4 1.8m optical telescope data.

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http://kadc.kao.re.kr/ http://www.kao.re.kr/ http://kvo.kao.re.kr/ http://www.boao.re.kr/

165 c Copyright 2004 Astronomical Society of the Pacific. All rights reserved.


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Figure 1. The Bohyunsan Optical Astronomy Observatory (BOAO) 1.8m optical reflecting telescope.

2.

KADC Archive

BOAO is located at the summit of Mt. Bohyun, south-eastern part of Korea, at the altitude of 1,162m. It is founded on April 1996 and has 1.8m reflecting telescope (Figure 1) as the main facility. Using the 400 GB data obtained by this telescope during 1997 September to 2002 December, we have constructed an archive. The database is consisted of photometric (using 1K CCD and 2K CCD) and spectroscopic (using medium-dispersion spectrograph) data and the number of FITS files exceeds 80,000. The first web service is being made by 1997 to 2001 data. Figure 2 shows the main page of this BOAO data archive. Primary search criterion of ob ject name or coordinates (with search box size) can be used to search for the data, and secondary optional search criteria of observation date, observer(s), data type, and/or instrument are also useful for obtaining concrete data. The search process is being operated by SQL using metadata-table which contains information of FITS header parameters. There are also JPG images for preview and re-sorting options for each table column are provided. Figure 3 shows a sample of search result page, from where the data can be uploaded to the FTP site for further downloading in FITS format (Figure 4).

3.

Future Works

The current prototype version of KADC will be expanded to contain the data produced by other Korean telescopes, such as those obtained from Taeduk 14m radio telescope, YSTAR (Yonsei Survey Telescopes for Astronomical Research)NEOPAT (Near Earth Ob ject PATrol) pro ject, and Galactic plane CO survey (l = 60 - 180) pro ject using the Seoul National University 6m radio telescope. Data from telescopes that will be built in the near future (e.g., Korean VLBI Network; KVN) and data from satellites launched by international cooperation (e.g., Far-ultraviolet IMaging Spectrograph (FIMS), Galaxy Evolution Explorer (GALEX)) will also be used.


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Figure 2. The main web page of the KADC BOAO database server. User can search data by typing ob ject name, coordinates and search box size, etc.

Figure 3.

The KADC web page showing the search result.


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Figure 4. The web page showing the ftp directory and the files obtained from the previous searches. References Kim, S. C., Sung, H.-i., Kim, B. G., Chun, M.-Y., Park, J.-H., Cho, S.-H., Byun, Y.-I., & Koo, B.-C. 2003, in Highlights of Astronomy, Vol. 13, 25th meeting of the IAU, Joint Discussion 8, in press