Multiband Optical Variability of the Blazar 3C 454.3 on Diverse Timescales
文献类型：期刊论文
| 作者 | Dogra, Karan38,39; Gupta, Alok C.37,39; Raiteri, C. M.36; Villata, M.36; Wiita, Paul J.35; Kurtanidze, S. O.34; Jorstad, S. G.32,33; Bachev, R.31; Damljanovic, G.29; Lorey, C.28 |
| 刊名 | ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
 |
| 出版日期 | 2025 |
| 卷号 | 276期号:1页码:1 |
| ISSN号 | 0067-0049 |
| DOI | 10.3847/1538-4365/ad8e3d |
| 产权排序 | 3 |
| 英文摘要 | Due to its peculiar and highly variable nature, the blazar 3C 454.3 has been extensively monitored by the WEBT team. Here, we present for the first time these long-term optical flux and color variability results using data acquired in B, V, R, and I bands over a time span of about two decades. We include data from WEBT collaborators and public archives such as SMARTS, Steward Observatory, and Zwicky Transient Facility. The data are binned and segmented to study the source over this long term when more regular sampling was available. During our study, the long-term spectral variability reveals a redder-when-brighter trend, which, however, stabilizes at a particular brightness cutoff of similar to 14.5 mag in the I band, after which it saturates and evolves into a complex state. This trend indicates increasing dominance of jet emission over accretion disk (AD) emission until jet emission completely dominates. Plots of the variation in spectral index (following F nu proportional to nu -alpha ) reveal a bimodal distribution using a one-day binning. These correlate with two extreme phases of 3C 454.3, an outburst or high-flux state and a quiescent or low-flux state, which are respectively jet- and AD-dominated. We have also conducted intraday variability studies of nine light curves and found that six of them are variable. Discrete correlation function analysis between different pairs of optical wave bands peaks at zero lags, indicating cospatial emission in different optical bands. |
| WOS关键词 | SPACE-TELESCOPE OBSERVATIONS ; GAMMA-RAY OUTBURSTS ; BL-LACERTAE ; ACCRETION DISKS ; INTRADAY VARIABILITY ; SPECTRAL VARIABILITY ; RADIO-LOUD ; INFRARED OBSERVATIONS ; LIGHT CURVES ; S5 0716+714 |
| 资助项目 | Fermi Guest Investigator[NNX08AW56G] ; Fermi Guest Investigator[NNX09AU10G] ; Fermi Guest Investigator[NNX12AO93G] ; Fermi Guest Investigator[NNX15AU81G] ; U.S. National Science Foundation[AST-1440341] ; U.S. National Science Foundation[AST-2034437] ; INAF Fundamental Research Funding ; Several NASA Fermi Guest Investigator[80NSSC22K1571] ; Several NASA Fermi Guest Investigator[80NSSC23K1507] ; Several NASA Fermi Guest Investigator ; Bulgarian National Science Fund of the Ministry of Education and Science[KP- 06-H68/4] ; Bulgarian National Science Fund of the Ministry of Education and Science ; Astronomical station Vidojevica ; Astronomical station Vidojevica ; Ministry of Science, Technological Development and Innovation of the Republic of Serbia[451-03-66/2024-03/200002] ; Ministry of Science, Technological Development and Innovation of the Republic of Serbia ; EC through project BELISSIMA[FP7-REGPOT-2010-5] ; EC through project BELISSIMA[256772] ; EC through project BELISSIMA ; Institute of Astronomy and Rozhen NAO BAS ; Institute of Astronomy and Rozhen NAO BAS ; SANU[F-187] ; SANU ; Science Fund of the Republic of Serbia[6775] ; Science Fund of the Republic of Serbia ; Urban Observatory of Belgrade-UrbObsBel ; Urban Observatory of Belgrade-UrbObsBel ; Egyptian Science, Technology & Innovation Funding Authority ( STDF )[45779] ; Egyptian Science, Technology & Innovation Funding Authority ( STDF ) ; Spanish Ministerio de Ciencia e Innovacion[CEX2021-001131-S] ; Spanish Ministerio de Ciencia e Innovacion[PID2019- 107847RB-C44] ; Spanish Ministerio de Ciencia e Innovacion[PID2022-139117NB-C44] ; Spanish Ministerio de Ciencia e Innovacion ; Tianshan Talent Training Program[2023TSYCCX0099] ; Tianshan Talent Training Program ; National Science Foundation of China[12473019] ; National Science Foundation of China ; China Manned Space Project[CMSCSST-2021- A06] ; China Manned Space Project ; National SKA Program of China[2022SKA0120102] ; National SKA Program of China ; Shanghai Pilot Program for Basic Research-Chinese Academy of Science, Shanghai Branch[JCYJ-SHFY-2021-013] ; Shanghai Pilot Program for Basic Research-Chinese Academy of Science, Shanghai Branch ; National Science Foundation of China[12233005] ; National Science Foundation of China |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:001372768800001 |
| 出版者 | IOP Publishing Ltd |
| 资助机构 | Fermi Guest Investigator ; U.S. National Science Foundation ; INAF Fundamental Research Funding ; Several NASA Fermi Guest Investigator ; Several NASA Fermi Guest Investigator ; Bulgarian National Science Fund of the Ministry of Education and Science ; Bulgarian National Science Fund of the Ministry of Education and Science ; Astronomical station Vidojevica ; Astronomical station Vidojevica ; Ministry of Science, Technological Development and Innovation of the Republic of Serbia ; Ministry of Science, Technological Development and Innovation of the Republic of Serbia ; EC through project BELISSIMA ; EC through project BELISSIMA ; Institute of Astronomy and Rozhen NAO BAS ; Institute of Astronomy and Rozhen NAO BAS ; SANU ; SANU ; Science Fund of the Republic of Serbia ; Science Fund of the Republic of Serbia ; Urban Observatory of Belgrade-UrbObsBel ; Urban Observatory of Belgrade-UrbObsBel ; Egyptian Science, Technology & Innovation Funding Authority ( STDF ) ; Egyptian Science, Technology & Innovation Funding Authority ( STDF ) ; Spanish Ministerio de Ciencia e Innovacion ; Spanish Ministerio de Ciencia e Innovacion ; Tianshan Talent Training Program ; Tianshan Talent Training Program ; National Science Foundation of China ; National Science Foundation of China ; China Manned Space Project ; China Manned Space Project ; National SKA Program of China ; National SKA Program of China ; Shanghai Pilot Program for Basic Research-Chinese Academy of Science, Shanghai Branch ; Shanghai Pilot Program for Basic Research-Chinese Academy of Science, Shanghai Branch ; National Science Foundation of China ; National Science Foundation of China |
| 源URL | [http://ir.xao.ac.cn/handle/45760611-7/7278]  |
| 专题 | 天体化学研究团组 |
| 通讯作者 | Dogra, Karan; Gupta, Alok C. |
| 作者单位 | 1.Pulkovo Observ, St. Petersburg 196140, Russia 2.Chinese Acad Sci, Natl Astron Observ, 20A Datun Rd, Beijing 100101, Peoples R China 3.Chinese Acad Sci, Key Lab Radio Astron & Technol, A20 Datun Rd, Chaoyang Dist, Beijing 100101, Peoples R China 4.Natl Sun Yat Sen Univ, Dept Phys, Kaohsiung 80424, Taiwan 5.Univ Siena, Dip Sci Fis Terra & Ambiente, Via Roma 56, I-53100 Siena, Italy 6.Univ Siena, Astron Observ, Via Roma 56, I-53100 Siena, Italy 7.Univ Wurzburg, Lehrstuhl Astron, D-97074 Wurzburg, Germany 8.Univ Diego Portales, Fac Ingn & Ciencias, Inst Estudios Astrofis, Ave Ejercito 441, Santiago, Chile 9.Chinese Acad Sci, Natl Astron Observ, Chinese Acad Sci South Amer Ctr Astron, Beijing 100101, Peoples R China 10.Kazan Fed Univ, Engelhardt Astron Observ, Tatarstan, Russia |
| 推荐引用方式 GB/T 7714 | Dogra, Karan,Gupta, Alok C.,Raiteri, C. M.,et al. Multiband Optical Variability of the Blazar 3C 454.3 on Diverse Timescales[J]. ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES,2025,276(1):1. |
| APA | Dogra, Karan.,Gupta, Alok C..,Raiteri, C. M..,Villata, M..,Wiita, Paul J..,...&Zuo, Wenwen.(2025).Multiband Optical Variability of the Blazar 3C 454.3 on Diverse Timescales.ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES,276(1),1. |
| MLA | Dogra, Karan,et al."Multiband Optical Variability of the Blazar 3C 454.3 on Diverse Timescales".ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES 276.1(2025):1. |
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来源：新疆天文台
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