X-Ray Intraday Variability of Five TeV Blazars with NuSTAR
文献类型：期刊论文
| 作者 | Pandey, Ashwani2,3; Gupta, Alok C.2,4; Wiita, Paul J.1 |
| 刊名 | ASTROPHYSICAL JOURNAL
 |
| 出版日期 | 2017-06-01 |
| 卷号 | 841期号:2 |
| 关键词 | Bl Lacertae Objects: General Bl Lacertae Objects: Individual (1es 0229+200, Mrk 421, Mrk 501, 1es 1959+650, Pks 2155-304) |
| ISSN号 | 0004-637X |
| DOI | 10.3847/1538-4357/aa705e |
| 英文摘要 | We have examined 40 Nuclear Spectroscopic Telescope Array (NuSTAR) light curves (LCs) of five TeV emitting high synchrotron peaked blazars: 1ES 0229+200, Mrk 421, Mrk 501, 1ES 1959+650, and PKS 2155-304. Four of the blazars showed intraday variability in the NuSTAR energy range of 3-79 keV. Using an autocorrelation function analysis we searched for intraday variability timescales in these LCs and found indications of several between 2.5 and 32.8 ks in eight LCs of Mrk 421, a timescale around 8.0 ks for one LC of Mrk 501, and timescales of 29.6 and 57.4 ks in two LCs of PKS 2155-304. The other two blazars' LCs do not show any evidence for intraday variability timescales shorter than the lengths of those observations; however, the data were both sparser and noisier for them. We found positive correlations with zero lag between soft (3-10 keV) and hard (10-79 keV) bands for most of the LCs, indicating that their emissions originate from the same electron population. We examined spectral variability using a hardness ratio analysis and noticed a general "harder-when-brighter" behavior. The 22 LCs of Mrk 421 observed between 2012 July and 2013 April show that this source was in a quiescent state for an extended period of time and then underwent an unprecedented double-peaked outburst while monitored on a daily basis during 2013 April 10-16. We briefly discuss models capable of explaining these blazar emissions. |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000402598400004 |
| 出版者 | IOP PUBLISHING LTD |
| 源URL | [http://119.78.226.72/handle/331011/32611]  |
| 专题 | 中国科学院上海天文台 |
| 通讯作者 | Pandey, Ashwani |
| 作者单位 | 1.Coll New Jersey, Dept Phys, 2000 Pennington Rd, Ewing, NJ 08628 USA 2.Aryabhatta Res Inst Observat Sci ARIES, Manora Peak 263002, Nainital, India 3.DDU Gorakhpur Univ, Dept Phys, Gorakhpur 273009, Uttar Pradesh, India 4.Chinese Acad Sci, Shanghai Astron Observ, Key Lab Res Galaxies & Cosmol, 80 Nandan Rd, Shanghai 200030, Peoples R China |
| 推荐引用方式 GB/T 7714 | Pandey, Ashwani,Gupta, Alok C.,Wiita, Paul J.. X-Ray Intraday Variability of Five TeV Blazars with NuSTAR[J]. ASTROPHYSICAL JOURNAL,2017,841(2). |
| APA | Pandey, Ashwani,Gupta, Alok C.,&Wiita, Paul J..(2017).X-Ray Intraday Variability of Five TeV Blazars with NuSTAR.ASTROPHYSICAL JOURNAL,841(2). |
| MLA | Pandey, Ashwani,et al."X-Ray Intraday Variability of Five TeV Blazars with NuSTAR".ASTROPHYSICAL JOURNAL 841.2(2017). |
入库方式： OAI收割
来源：上海天文台
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