STEPS TOWARD DETERMINATION OF THE SIZE AND STRUCTURE OF THE BROAD-LINE REGION IN ACTIVE GALACTIC NUCLEI .3. FURTHER OBSERVATIONS OF NGC-5548 AT OPTICAL WAVELENGTHS

被引：79

作者：

PETERSON, BM

ALLOIN, D

AXON, D

BALONEK, TJ

BERTRAM, R

BOROSON, TA

CHRISTENSEN, JA

CLEMENTS, SD

DIETRICH, M

ELVIS, M

FILIPPENKO, AV

GASKELL, CM

HASWELL, CA

HUCHRA, JP

JACKSON, N

KOLLATSCHNY, W

KORISTA, KT

LAME, NJ

LEACOCK, RJ

LIN, SN

MALKAN, MA

MONK, AS

PENSTON, MV

POGGE, RW

ROBINSON, A

ROSENBLATT, EI

SHIELDS, JC

SMITH, AG

STIRPE, GM

SUN, WH

TURNER, TJ

WAGNER, RM

WILKES, BJ

WILLS, BJ

机构：

[1] OBSERV PARIS,CNRS,URA 173,F-92195 MEUDON,FRANCE

[2] COLGATE UNIV,DEPT PHYS & ASTRON,HAMILTON,NY 13346

[3] KITT PEAK NATL OBSERV,NATL OPT ASTRON OBSERV,TUCSON,AZ 85726

[4] UNIV MANCHESTER,NUFFIELD RADIO ASTRON LABS,MACCLESFIELD SK11 9DL,CHESHIRE,ENGLAND

[5] UNIV FLORIDA,DEPT ASTRON,GAINESVILLE,FL 32611

[6] UNIV STERNWARTE GOTTINGEN,W-3400 GOTTINGEN,GERMANY

[7] HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138

[8] UNIV CALIF BERKELEY,DEPT ASTRON,BERKELEY,CA 94720

[9] UNIV MICHIGAN,DEPT ASTRON,ANN ARBOR,MI 48109

[10] UNIV TEXAS,DEPT ASTRON,AUSTIN,TX 78712

[11] UNIV TEXAS,MCDONALD OBSERV,AUSTIN,TX 78712

[12] NATL CENT UNIV,INST PHYS & ASTRON,32054 CHUNGLI,TAIWAN

[13] UNIV CALIF LOS ANGELES,DEPT ASTRON,LOS ANGELES,CA 90024

[14] ROYAL GREENWICH OBSERV,CAMBRIDGE CB3 0EZ,ENGLAND

[15] UNIV CAMBRIDGE,INST ASTRON,CAMBRIDGE CB3 0HA,ENGLAND

[16] UNIV CALIF SAN DIEGO,CTR ASTROPHYS & SPACE SCI,LA JOLLA,CA 92093

[17] OSSERV ASTRON BOLOGNA,I-40126 BOLOGNA,ITALY

[18] NASA,GODDARD SPACE FLIGHT CTR,HIGH ENERGY ASTROPHYS LAB,GREENBELT,MD 20771

来源：

ASTROPHYSICAL JOURNAL | 1992年 / 392卷 / 02期

关键词：

GALAXIES; INDIVIDUAL; (NGC-5548); SEYFERT; QUASARS; EMISSION LINES;

D O I：

10.1086/171447

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We report on thc results of the second year of an intensive ground-based spectroscopic and photometric study of variability in the bright Seyfert 1 galaxy NGC 5548, which has been undertaken in order to study the relationship between continuum and emission-line variability. Relative to the first year of the monitoring program, the nucleus of NGC 5548 was considerably fainter and the continuum variations slower during the second year, but the continuum-H-beta cross-correlation results for the two years are nearly identical. The variations in the broad H-beta emission line lag behind those in the continuum by somewhat less than 20 days, as concluded from the first year's data.

引用

页码：470 / 484

页数：15

共 13 条

[1] THE DESIGN AND TESTING OF FILTER-DETECTOR SYSTEMS USING SYNTHETIC PHOTOMETRY [J].