南極巡天望遠(yuǎn)鏡AST3海量數(shù)據(jù)高精度測(cè)光進(jìn)展報(bào)告

商朝暉++劉強(qiáng)

摘 要：南極冰穹A是南極內(nèi)陸海拔最高、溫度最低和最干燥的地方，因此，國際上普通預(yù)測(cè)冰穹A是地球上最佳的天文臺(tái)址之一。中國天文學(xué)家于2008年首次到達(dá)冰穹A，并從此開始在冰穹A安裝天文臺(tái)址監(jiān)測(cè)設(shè)備，截止目前得到的結(jié)果均表明，冰穹A是一個(gè)極佳的天文臺(tái)址。南極巡天望遠(yuǎn)鏡（AST3）是冰穹A的第二代光學(xué)天文望遠(yuǎn)鏡，由3臺(tái)50 cm口徑的施密特望遠(yuǎn)鏡組成，配備了目前世界上單片最大的CCD相機(jī)（10 K×10 K），望遠(yuǎn)鏡視場是4.3平方度。AST3將在南極冰穹A開展大視場多波段巡天，它主要的科學(xué)目標(biāo)是時(shí)域天文學(xué)。除了望遠(yuǎn)鏡和CCD相機(jī)，成功的巡天還需要好的巡天規(guī)劃、控制系統(tǒng)和數(shù)據(jù)處理系統(tǒng)。由于南極極端的自然條件，AST3需要在無人干預(yù)的情況下遠(yuǎn)程遙控工作，因此，我們需要研制一套穩(wěn)定可靠的運(yùn)行和控制系統(tǒng)來運(yùn)行望遠(yuǎn)鏡。受限于銥星的帶寬，我們不可能把整幅圖像傳回（120 M），這就需要我們?cè)诋?dāng)?shù)乜焖偬幚頂?shù)據(jù)，并傳回星表?；谝陨显?，我們優(yōu)化了巡天運(yùn)行和控制系統(tǒng)，完成了巡天規(guī)劃和高精度測(cè)光。除了AST3，我們的研究成果也可以應(yīng)用到其他光學(xué)望遠(yuǎn)鏡和巡天項(xiàng)目，尤其是十二五南極天文臺(tái)的光學(xué)/紅外望遠(yuǎn)鏡（KDUST）上。

關(guān)鍵詞：運(yùn)行 控制 數(shù)據(jù)庫 南極巡天望遠(yuǎn)鏡

Accurate Photometry of Massive Data for Antarctic Survey Telescopes （AST3）

Shang Chaohui1 Liu Qiang2

（1.Tianjin Normal University； 2.National Astronomical Observatories， Chinese Academy of Sciences）

Abstract：Dome A， Antarctica is predicted one of the best astronomical site， because it is the highest， coldest and driest in the Antarctic continent. Chinese astronomers reached Dome A in 2008 and installed several site-testing instruments since that year， the results all indicate Dome A is the best site for astronomical observation. Antarctic Survey Telescopes （AST3） is the second generation optical telescopes at Dome A， which consist of three Schmidt telescopes with aperture 50 cm， each telescope is equipped STA 10 K×10 K CCD camera with field of view 4.3 square degrees. They will be used for large area， multi-color sky survey at Dome A， Antarctica. The main research will focus on time-domain astronomy. Besides the telescopes and CCD cameras， a successful survey also needs a good survey scheduling and control system， and massive data reduction system. Due to the harsh natural condition of the Dome A site， the telescope can thus work in a remote area without human intervention for a long period of time， so， we must have a robust operation and control system to operate the telescope. Limited to Iridium satellite bandwidth， we can′t transfer whole image back （120 M）， which asks us to reduce the data at local and transfer the catalog back. Based on the current AST3 system， we optimized the survey operation and control system， completed the survey scheduling and achieved high precision photometry. Our study will also benefit other optical telescopes and survey programs， especially the optical/IR telescope （KDUST） of the 12.5 project for the Antarctic Dome A.

Key Words：Operation；Control；Database；AST3