VERA Ishigaki

石垣島天文台の活動報告14

Airport

早津 夏己
国立天文台特任研究員（2022年9月〜）

IshAstO (Ishigakijima Astronomical Observatory）
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第14回光赤外線天文学大学連携(OISTER)ワークショップ

2024/03/07 ＠東京工業大学、ハイブリッド形式（現地参加）

石垣島天文台(IshAstO)
研究・教育・広報を活動の主軸として六者連携で運営している国内最南端の天文台

空の良さ・地理的な良さ・設備の良さの三拍子
光害の影響少（石垣島は日本初の星空保護区）
ジェット気流の影響が少ない（大気のゆらぎ小）低緯度（天の川が空の高い位置に出現）
九州・沖縄で最大口径の可視・赤外望遠鏡- OISTERで即時観測のネットワークを構築▲石垣島天文台の運営6機関
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Murikabushi 105cm telescope ※UPSの交換用バッテリー無事に交換できました。ありがとうございます！
Main purpose

Murikabushi:• Observation of transient objects and SolarSystem objects under the good geographic
and atmospheric conditions• a local dialect name of thePleiades (M45, Subaru in Japanese)• Contribution for astronomical educationand promotion with public outreach

Murikabushi 105cm telescope (F12)• Ritchey‒Chrétien telescope• Altazimuth mount

FYI:
SeeingThree Foci• ~1.5 arcsec in summer• Cassegrain focus (for research)(~2.5 arcsec otherwise)• Nasmyth focus 1(→F18) for
visual observation)

Rate of fine weather• Nasmyth focus 2 (for research)• 30-50% in summer(10-20% otherwise)©NAOJ3

MITSuME for Research activities
MITSuME: Multi-color Imaging Telescopes for Surveys andMonstrous Explosions(Development : Tokyo Tech, Kyoto Univ.,and NAOJ)
It was installed for immediate observation of gamma-ray bursts andcan simultaneously capture images in three colors (g', Rc, Ic).

CCD Camera: Apogee Alta U6
Number of Pixels: 1024 1024
Filters: g', Rc, Ic (475nm, 647nm, 787nm)
Field of View: 12.3 12.3 arcmin2
Pixel Scale: 0.72 arcseconds per pixel
Detection Limit (mag): gʼ=18.7, Rc=19.0, Ic=17.8[S/N=10, 1-minute exposure]̶> 32 publications (2010~2023)©IAO, NAOJ

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Testing the E ectiveness of Starlink Satellite's Dark Coating with aMurikabushi Telescope (Web Release on December, 2020)

Targets
Observations and research are carried out on various
objects such as solar system object (comets,asteroids), supernovae, AGN, ELIRG, GRB (e.g.,Maselli et al. 2013 Science), and binary black holemerger, artificial satellite.
My duty (50%):- Operations of campaign observations and Targetof Opportunity (ToO) observations.
- immediate report of analysis results; photometry,light curve creation, etc..
- Research using Murikabushi telescope- Outreach and education activities

ff5(See Also; Horiuchi et al. 2023)

From a 'member of a domestic community' to a 'member of aninternational community'- From 2006:
Observation of solar system, including the monitoring of comets and asteroids for sudden phenomena.
- From 2007:
Equipped with the MITSuME camera for simultaneous three-color imaging at three locations in Japan,
enabling immediate observation of GRB afterglows.
- From 2011:
Participation in the Optical and Infrared Astronomy Inter-University Cooperation (OISTER),
which includes nine national institutions, for observing sudden celestial events such as GRBs, supernovae, andvariable stars.
- From 2016:
Involvement in the GROWTH project with 13 institutions across seven countries for the global relay
observation of transient celestial phenomena.
- From 2017:
The JOVIAL project involving Japan, France, and the USA for continuous simultaneous observationsof Jupiter's surface oscillations.

Asteroid (372024) Ayapani found by highschool student in 2008.

Education- Time changes of the sundialaround the summer solstice 2023
- webinar for junior school students- summar program for high school students(became a model for a mangaʻAsteroid in love/恋する小惑星ʼ)- A lecture for undergraduate student- Bachelor thesis, master thesis©国立天文台Some students will attend thejunior session in ASJ annual
meeting in March 2024.

OutreachWith over 10,000 visitors annually (before the pandemic),
yet struggling with budget cuts and aging facilities.

Transition to a paid tour from 2022.
- Can it become a role model for public observatories?
Advertise: Regular Radio Program (March 2024~)

X(Twitter)@IshAstO_naoj

まとめ

研究
32本の査読論文

教育活動
小学校から大学院まで

3色カメラ制御用PCの故障は夏までに復旧見込み

広報活動
観望会、Youtubeやラジオなども9©NAOJ