Simultaneous Multi-Wavelength Observations of the TeV Blazar Mrk 421 during February-March,2003:X-Ray and NIR Correlated Variability

作     者：Alok C. Gupta B. S. Acharya Debanjan Bose Varsha R. Chitnis Jun-Hui Fan 

作者机构：Center for Astrophysics Guangzhou University Guangzhou 510006 China Tata Institute of Fundamental Research Homi Bhabha Road Colaba Mumbai - 400 005 India Aryabhatta Research Institute of Observational Sciences （ARIES） Manora Peak Nainital - 263129India 

出 版 物：《Chinese Journal of Astronomy and Astrophysics》 (中国天文和天体物理学报（英文版）)

年 卷 期：2008年第8卷第4期

页      面：395-403页

核心收录：

学科分类：07[理学] 070401[理学-天体物理] 0704[理学-天文学] 

基　　金：the National Natural Science Foundation of China(Grants 10573005 and 10125313) 

主　　题：galaxies active - galaxies blazars general - galaxies blazars individual Mrk 421 

摘      要：We report the result of simultaneous multi-wavelength observations of the TeV blazar Mrk 421 during February - March 2003. We observed Mrk 421 using the Pachmarhi Array of Cerenkov Telescopes （PACT） of Tata Institute of Fundamental Research at Pachmarhi, India. Other simultaneous data were taken from the literature and public data archives. We have analyzed the high quality X-ray （2-20 keV） observations from the NASA Rossi X-Ray Timing Explorer （RXTE）. We obtained a possible correlated variability between X-ray and J band （1.25 μ） near infrared （NIR） wavelength. This is the first case of X-ray and NIR correlated variability in Mrk 421 or any high energy peaked （HBL） blazar. The correlated variability reported here indicates a similar origin for the NIR and X-ray emissions. The emission is not affected much by the environment of the surrounding medium of the central engine of Mrk 421. The observations are consistent with the shock-in-jet model for the emissions.