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 

机构地区：[1]Center for Astrophysics, Guangzhou University, Guangzhou 510006, China [2]Tata Institute of Fundamental Research, Homi Bhabha Road, Colaba, Mumbai - 400 005, India [3]Aryabhatta Research Institute of Observational Sciences （ARIES）, Manora Peak, Nainital - 263129,India

出　　处：《Chinese Journal of Astronomy and Astrophysics》2008年第4期395-403,共9页中国天文和天体物理学报（英文版）

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

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.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.

关 键 词：GALAXIES active - galaxies BLAZARS general - galaxies BLAZARS individual Mrk 421 

分 类 号：P141[天文地球—天体物理]