Forecasting supernova observations with the CSST:I.Photometric samples  

作　　者：Chengqi Liu Youhua Xu Xianmin Meng Xin Zhang Shi-Yu Li Yuming Fu Xiaofeng Wang Shufei Liu Zun Luo Guanghuan Wang Hu Zhan 

机构地区：[1]Department of Astronomy,School of Physics,Peking University,Beijing 100871,China [2]Kavli Institute for Astronomy and Astrophysics,Peking University,Beijing 100871,China [3]Key Laboratory of Space Astronomy and Technology,National Astronomical Observatories,Chinese Academy of Sciences,Beijing 100101,China [4]Beijing Planetarium,Beijing Academy of Science and Technology,Beijing 100044,China [5]Leiden Observatory,Leiden University,NL-2300 RA Leiden,The Netherlands [6]Kapteyn Astronomical Institute,University of Groningen,NL-9700 AV Groningen,The Netherlands [7]Physics Department,Tsinghua University,Beijing 100084,China [8]School of Astronomy and Space Science,University of ChineseAcademy of Sciences,Beijing 100049,China

出　　处：《Science China(Physics,Mechanics & Astronomy)》2024年第11期164-177,共14页中国科学：物理学、力学、天文学（英文版）

基　　金：supported by the National Key R&D Program of China(Grant Nos.2022YFF0503400 and 2022YFF0503401);China Manned Space Program(Grant Nos.CMS-CSST-2021-B01,CMS-CSST-2021-B04,and CMS-CSST2021-A12);Science Program of Beijing Academy of Science and Technology(Grant No.24CD014);National Natural Science Foundation of China(Grant Nos.12288102 and 12033003);Tencent Xplorer Prize。

摘　　要：The China Space Station Telescope(CSST,also known as Xuntian)is a serviceable two-meter-aperture wide-field telescope operating in the same orbit as the China Space Station.The CSST plans to survey a sky area of 17,500 deg^(2)of the medium-to-high Galactic latitude to a depth of 25-26 AB mag in at least 6 photometric bands over 255-1,000 nm.Within such a large sky area,slitless spectra will also be taken over the same wavelength range as the imaging survey.Even though the CSST survey is not dedicated to time-domain studies,it would still detect a large number of transients,such as supernovae(SNe).In this paper,we simulate photometric SN observations based on a strawman survey plan using the Sncosmo package.During its 10-year survey,the CSST is expected to observe about 5 million SNe of various types.With quality cuts,we obtain a“gold”sample that comprises roughly 7,400 SNe Ia,2,200 SNe Ibc,and 6,500 SNeⅡcandidates with correctly classified percentages reaching 91%,63%,and 93%(formally defined as classification precision),respectively.The same survey can also trigger alerts for the detection of about 15,500 SNe Ia(precision 61%)and 2,100 SNeⅡ(precision 49%)candidates at least two days before the light maxima.Moreover,the near-ultraviolet observations of the CSST will be able to catch hundreds of shock-cooling events serendipitously every year.These results demonstrate that the CSST can make a potentially significant contribution to SN studies.

关 键 词：space-based ultraviolet optical and infrared telescopes SUPERNOVAE data analysis 

分 类 号：P145.3[天文地球—天体物理]