Energy dependent X-ray variability of the TeV blazars PKS 2155-304 and MKN 421

被引：0

作者：

Zhang, YH ^{[1
]}

Celotti, A ^{[1
]}

Treves, A ^{[1
]}

Fossati, G ^{[1
]}

Maraschi, L ^{[1
]}

Pian, E ^{[1
]}

Paltani, S ^{[1
]}

Tavecchio, F ^{[1
]}

Chiappetti, L ^{[1
]}

Ghisellini, G ^{[1
]}

Tagliaferri, G ^{[1
]}

Chiaberge, M ^{[1
]}

机构：

[1] Scuola Int Super Studi Avanzati, I-34014 Trieste, Italy

来源：

X-RAY ASTRONOMY: STELLAR ENDPOINTS, AGN, AND THE DIFFUSE X-RAY BACKGROUND | 2001年 / 599卷

关键词：

BL Lacertae objects : individual (PKS 2155-304 and MKN 421); X-rays : variability;

D O I：

暂无

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present the X-ray variability properties of the TeV blazars PKS 2155-304 and MKN 421 as observed with BeppoSAX and ASCA. The minimum timescales of similar to 1000s are suggested. For PKS 2155-304 we found that the soft X-ray lags (relative to higher energies) are inversely correlated with the source intensity, i.e. the lag is longer when the source is fainter. In April 1998 a flare of MKN 421 was detected, during which higher energy X-rays lagged lower energy ones by similar to 2500s. The origin of these lags is briefly discussed.

引用

页码：1019 / 1022

页数：4

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