EXOSAT OBSERVATIONS OF CYGNUS X-2 CONTINUUM AND LINE SPECTRUM

被引：16

作者：

CHIAPPETTI, L

TREVES, A

BRANDUARDIRAYMONT, G

CIAPI, AL

ERCAN, EN

FREEMAN, PE

KAHN, SM

MARASCHI, L

PAERELS, FBS

TANZI, EG

机构：

[1] UNIV MILAN, DEPARTIMENTO FIS, I-20133 MILAN, ITALY

[2] UCL, MULLARD SPACE SCI LAB, DORKING RH5 6NT, SURREY, ENGLAND

[3] BOGAZICI UNIV, DEPT PHYS, ISTANBUL, TURKEY

[4] UNIV CALIF BERKELEY, DEPT PHYS, BERKELEY, CA 94720 USA

[5] UNIV CALIF BERKELEY, SPACE SCI LAB, BERKELEY, CA 94720 USA

[6] UNIV CALIF LAWRENCE LIVERMORE NATL LAB, INST GEOPHYS & PLANETARY PHYS, LIVERMORE, CA 94550 USA

来源：

ASTROPHYSICAL JOURNAL | 1990年 / 361卷 / 02期

关键词：

Stars: individual (Cyg X-2); X-rays: binaries;

D O I：

10.1086/169223

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present an analysis of five EXOSAT observations of Cyg X-2, taken around a full binary orbit. The data were obtained using all instrumentation (1000 lines mm-1 Transmission Grating Spectrometer, Channel Multiplier Array + filters, Medium-Energy experiment, Gas Scintillation Proportional Counter) simultaneously, and span the full energy range 0.5-20 keV. We find no clear evidence for a correlation of any of the source characteristics with orbital phase. During two of our observations significant iron K emission at 6.7 keV was detected, the relative strength of which seems to correlate with total X-ray intensity during two sharp intensity dips. We confirm the previous detection of discrete emission features in the 12-19 A band with the Einstein grating.

引用

页码：596 / 606

页数：11

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