X-ray rapid variability of MKN 421
نویسندگان
چکیده
منابع مشابه
Correlated variability of Mkn 421 at X-ray and TeV wavelengths on time scales of hours
Mkn 421 was observed for about two days with BeppoSAX, prior to and partly overlapping the start of a 1 week continuous exposure with ASCA in April 1998, as part of a world-wide multiwavelength campaign. A pronounced, welldefined flare observed in X-rays was also observed simultaneously at TeV energies by the Whipple Observatory’s 10 m gamma-ray telescope. These data provide the first evidence ...
متن کاملThe quiescent state broadband X - ray spectrum and variability of Mkn 421
The BL Lac object Mkn 421 was observed three times by the X-ray observatory BeppoSAX in consecutive days during 1997 April and May. The source was in a quiescent state, with an average 2–10 keV flux of 9.0×10 erg cm s. Flux variation by a factor of ≃2 on timescales as short as a few 10 s were more pronounced in the hard (i.e. above ≃3 keV) than in the soft X-rays. The broadband (0.1–40 keV) spe...
متن کاملX - ray spectral variability in Mkn 421 observed with XMM - Newton
The bright blazar Mkn 421 has been observed four times for uninterrupted durations of ∼ 9 − 13 hr during the performance verification and calibration phases of the XMM-Newton mission. The source was strongly variable in all epochs, with variability amplitudes that generally increased to higher energy bands. Although the detailed relationship between soft (0.1–0.75 keV) and hard (2–10 keV) band ...
متن کاملThe Nonlinear Long - term X - ray Variability of Mrk 421
In this work, I present the results of a thorough nonlinear time series analysis study concerning the long-term variability behaviour of Mrk 421. I use all the archival data obtained by the proportional counter array (PCA) and the all-sky monitor (ASM) aboard the Rossi X-ray timing explorer (RXTE), since 1996. Linearity and stationarity tests reveal that the long-term timing properties of the s...
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ژورنال
عنوان ژورنال: Astronomische Nachrichten
سال: 1999
ISSN: 0004-6337,1521-3994
DOI: 10.1002/1521-3994(199908)320:4/5<317::aid-asna317>3.0.co;2-w