典型文献
North Celestial Region Observed with 21 CentiMeter Array
文献摘要：
The 21 CentiMeter Array(21CMA)is a radio interferometer in western China.The key science objective of 21CMA is statistically measuring the redshifted HI 21 cm signal of the Epoch of Reionization(EoR).In order to achieve this,a catalog of radio sources is necessary for both calibration and foreground removal.In this work,we present a catalog of 832 radio sources within a radius of 5° around the North Celestial Pole region observed with 21CMA.Three days of data taken in 2013 are used in the analysis,with a frequency coverage from 75 to 200 MHz and an angular resolution of about two arcminutes at 200 MHz.Flux densities and estimated spectral indices of the radio sources are provided in the source catalog.For simplicity,only the east-west baseline is used for the observations to avoid the so-called w-term in the data analysis.The longest baseline along the east-west direction is 2780 m.Comparing our source counts with other radio observations,we find a good agreement with the observations made with the Giant Metrewave Radio Telescope and Murchison Widefield Array.Our data reduction is still limited by grating lobes of very bright sources in the field due to the redundant configuration of 21CMA.We note that understanding the properties of radio sources,and modeling and removing the radio sources are challenges for the EoR experiments.
文献关键词：
中图分类号：
作者姓名：
Bi-Xuan Zhao;Oian Zheng;Huan-Yuan Shan;Ouan Guo;Kuan-Jun Li
作者机构：
Shanghai Astronomical Observatory,Chinese Academy of Sciences,80 Nandan Road,Shanghai 200030,China;National Astronomical Observatory,Chinese Academy of Sciences,20 Datun Road,Beijing 100101,China
文献出处：
引用格式：
[1]Bi-Xuan Zhao;Oian Zheng;Huan-Yuan Shan;Ouan Guo;Kuan-Jun Li-.North Celestial Region Observed with 21 CentiMeter Array)[J].天文和天体物理学研究,2022(01):126-136
A类：
Celestial,CentiMeter,21CMA,Epoch,Reionization,EoR,arcminutes,Metrewave,Murchison,Widefield
B类：
North,Region,Observed,Array,radio,interferometer,western,China,key,science,objective,statistically,measuring,redshifted,HI,signal,In,order,achieve,this,catalog,sources,necessary,both,calibration,foreground,removal,work,present,within,radius,around,Pole,region,observed,Three,days,data,taken,are,used,analysis,frequency,coverage,from,MHz,angular,resolution,about,two,Flux,densities,estimated,spectral,indices,provided,For,simplicity,only,east,baseline,observations,avoid,called,term,longest,along,direction,Comparing,counts,other,find,good,agreement,made,Giant,Radio,Telescope,Our,reduction,still,limited,by,grating,lobes,very,bright,due,redundant,configuration,We,note,that,understanding,properties,modeling,removing,challenges,experiments
AB值：
0.493916
相似文献
机标中图分类号，由域田数据科技根据网络公开资料自动分析生成，仅供学习研究参考。
