TRANSFER-FUNCTION ANALYSIS OF ULTRAVIOLET OBSERVATIONS OF NGC-5548

被引：6

作者：

KOEN, C ^{[1
]}

机构：

[1] UNIV CAPE TOWN,DEPT STAT,RONDEBOSCH 7700,SOUTH AFRICA

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 1993年 / 262卷 / 04期

关键词：

METHODS; DATA ANALYSIS; GALAXIES; SEYFERT; ULTRAVIOLET;

D O I：

10.1093/mnras/262.4.823

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

A general linear transfer function relating an input series (UV continuum flux) to an output series (emission-line flux) is presented. The methodology for fitting the transfer function is briefly described. The autocorrelation structure of IUE observations of NGC 5548 in different spectral bands is investigated, and appropriate univariate autoregressive moving average models given. The results of extensive transfer function fitting, using respectively the lamdalambda1337 and 1350 continuum variations as input series, are presented. There is little evidence for a dead time in the response of the emission-line variations, which are presumed to be driven by the continuum.

引用

页码：823 / 830

页数：8

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