Correcting the Contamination of Second-order Spectra: Improving Hα Measurements in Reverberation Mapping Campaigns

doi:10.1088/1674-4527/ad06f2

	Correcting the Contamination of Second-order Spectra: Improving Hα Measurements in Reverberation Mapping Campaigns
	Xi WZ(席文哲)1,2,3; Lu KX(卢开兴)1,3; Feng HC(封海成)1,3; Li SS(李莎莎)1,3; Bai JM(白金明)1,3; Zhou, Rui-Lei 2,4; Liu HT(刘洪涛)1,3; Wang JG(王建国)1,3
刊名	RESEARCH IN ASTRONOMY AND ASTROPHYSICS
	2023-12-01
卷号	23 期号:12
关键词	techniques: spectroscopic methods: data analysis galaxies: individual (NGC 5548) (galaxies:) quasars: emission lines
ISSN号	1674-4527
DOI	10.1088/1674-4527/ad06f2
产权排序	第1完成单位
文献子类	Article
英文摘要	Long-term spectroscopic monitoring campaigns on active galactic nuclei (AGNs) provide a wealth of information about its interior structure and kinematics. However, a number of the observations suffer from the contamination of second-order spectra (SOS) which will introduce some undesirable uncertainties at the red side of the spectra. In this paper, we test the effect of SOS and propose a method to correct it in the time domain spectroscopic data using the simultaneously observed comparison stars. Based on the reverberation mapping (RM) data of NGC 5548 in 2019, one of the most intensively monitored AGNs by the Lijiang 2.4 m telescope, we find that the scientific object, comparison star, and spectrophotometric standard star can jointly introduce up to similar to 30% SOS for Grism 14. This irregular but smooth SOS significantly affects the flux density and profile of the emission line, while having little effect on the light curve. After applying our method to each spectrum, we find that the SOS can be corrected effectively. The deviation between corrected and intrinsic spectra is similar to 2%, and the impact of SOS on time lag is very minor. This method makes it possible to obtain the H alpha RM measurements from archival data provided that the spectral shape of the AGN under investigation does not have a large change.
学科主题	天文学
URL标识	查看原文
出版地	20A DATUN RD, CHAOYANG, BEIJING, 100101, PEOPLES R CHINA
资助项目	National Key R&D Program of China[2021YFA1600404]; National Natural Science Foundation of China (NSFC)[11991051]; National Natural Science Foundation of China (NSFC)[12303022]; National Natural Science Foundation of China (NSFC)[12373018]; National Natural Science Foundation of China (NSFC)[12203096]; National Natural Science Foundation of China (NSFC)[12103041]; National Natural Science Foundation of China (NSFC)[12073068]; Yunnan Fundamental Research Projects[202301AT070339]; Yunnan Fundamental Research Projects[202301AT070358]; Yunnan Postdoctoral Foundation; Yunnan Province Foundation[202001AT070069]; Youth Innovation Promotion Association of the Chinese Academy of Sciences[2022058]; Topnotch Young Talents Program of Yunnan Province, Special Research Assistant Funding Project of Chinese Academy of Sciences; China Manned Space Project[CMS-CSST-2021-A06]; Chinese Academy of Sciences; People's Government of Yunnan Province
WOS关键词	SUPERMASSIVE BLACK-HOLES ; HIGH ACCRETION RATES ; ACTIVE GALACTIC NUCLEI ; BROAD-LINE REGION ; OPTICAL VARIABILITY ; SEYFERT-GALAXIES ; LAGS ; QUASARS ; MASSES ; BETA
WOS研究方向	Astronomy & Astrophysics
语种	英语
出版者	NATL ASTRONOMICAL OBSERVATORIES, CHIN ACAD SCIENCES
WOS记录号	WOS:001114816000001
资助机构	National Key R&D Program of China[2021YFA1600404] ; National Natural Science Foundation of China (NSFC)[11991051, 12303022, 12373018, 12203096, 12103041, 12073068] ; Yunnan Fundamental Research Projects[202301AT070339, 202301AT070358] ; Yunnan Postdoctoral Foundation ; Yunnan Province Foundation[202001AT070069] ; Youth Innovation Promotion Association of the Chinese Academy of Sciences[2022058] ; Topnotch Young Talents Program of Yunnan Province, Special Research Assistant Funding Project of Chinese Academy of Sciences ; China Manned Space Project[CMS-CSST-2021-A06] ; Chinese Academy of Sciences ; People's Government of Yunnan Province
内容类型	期刊论文
版本	出版稿
源URL	[http://ir.ynao.ac.cn/handle/114a53/26435]
专题	云南天文台_大样本恒星演化研究组
作者单位	1.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650011, China; lukx@ynao.ac.cn; 2.University of Chinese Academy of Sciences, Beijing 100049, China; 3.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650011, China; hcfeng@ynao.ac.cn; 4.CAS Key Laboratory of FAST, National FAST, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100101, China
推荐引用方式 GB/T 7714	Xi WZ,Lu KX,Feng HC,et al. Correcting the Contamination of Second-order Spectra: Improving Hα Measurements in Reverberation Mapping Campaigns[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2023,23(12).
APA	席文哲.,卢开兴.,封海成.,李莎莎.,白金明.,...&王建国.(2023).Correcting the Contamination of Second-order Spectra: Improving Hα Measurements in Reverberation Mapping Campaigns.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,23(12).
MLA	席文哲,et al."Correcting the Contamination of Second-order Spectra: Improving Hα Measurements in Reverberation Mapping Campaigns".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 23.12(2023).