THE ULTRAVIOLET TO NEAR-INFRARED SPECTRAL FLUX DISTRIBUTION OF 4 BL LACERTAE

被引：26

作者：

FALOMO, R

TREVES, A

CHIAPPETTI, L

MARASCHI, L

PIAN, E

TANZI, EG

机构：

[1] SCUOLA INT SUPER STUDI AVANZATI,I-34014 TRIESTE,ITALY

[2] CNR,1ST FIS COSM,I-20133 MILAN,ITALY

[3] UNIV GENOA,DIPARTIMENTO FIS,I-16126 GENOA,ITALY

来源：

ASTROPHYSICAL JOURNAL | 1993年 / 402卷 / 02期

关键词：

BL LACERTAE OBJECTS; GENERAL; INFRARED; GALAXIES; ULTRAVIOLET;

D O I：

10.1086/172154

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We report on simultaneous UV, optical, and near-IR observations of four BL Lac objects. For three objects (PKS 0118-27, PKS 0301-24, and PKS 1538 + 14), we find that the spectral flux distribution from 8 x 10(13) to 2.5 x 10(15) Hz is well described by a single power law with spectral index alpha(nu) = 1.2, alpha(nu) = 1.0, and alpha(nu) = 1.3, respectively. For H0323 + 02, after subtraction of the contribution due to the host galaxy, the spectral emission is again consistent with a single, flatter power law, alpha(nu) = 0.78.

引用

页码：532 / 536

页数：5

共 51 条

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