1994A&A...284...33D

Query : 1994A&A...284...33D

1994A&A...284...33D - Astronomy and Astrophysics, volume 28433-43 (1994/4-1)

Monitoring of active galactic nuclei. IV. The Seyfert 1 galaxy NGC 4593.

DIETRICH M., KOLLATSCHNY W., ALLOIN D., ARETXAGA I., AXON D., DE BRUYN A.G., CLAVEL J., GOAD M.R., GONDHALEKAR P., VAN GRONINGEN E., HORNE K., JACKSON N., LAURIKAINEN E., LAWRENCE A., MASEGOSA J., MOLES M., O'BRIEN P., DEL OLMO A., PENSTON M.V., PEREA J., PEREZ E., PEREZ-FOURNON I., PERRY J.J., PETERSON B.M., ROBINSON A., RODRIGUEZ ESPINOSA J.M., STIRPE G.M., TADHUNTER C., TERLEVICH R., UNGER S., WAGNER S.J., WANDERS I. and WILLIAMS R.

Abstract (from CDS):

Result. of a five-month campaign of optical monitoring the Seyfert 1 galaxy NGC 4593 are presented. High resolution Hα and Hβ spectra and direct images in the Johnson U, B, V, R and I bands were obtained between January and June 1990. The emission lines and the continuum showed strong variations on time scales of weeks to days. The Hα line varied by more than 30% within only 5 days. Cross-correlating the light curves of the Balmer lines with that of the optical continuum gives a lag of around 4 days. Therefore, this low luminosity Seyfert galaxy may have one of the smallest BLRs known so far.

Abstract Copyright: ∼

Journal keyword(s): galaxies: individual: NGC 4593 - galaxies: Seyfert - lines: profile

Simbad objects: 2

View the references in ADS

Number of rows : 2

N	Identifier	Otype	ICRS (J2000) RA	ICRS (J2000) DEC	Mag U	Mag B	Mag V	Mag R	Mag I	Sp type	#ref 1850 - 2026	#notes
1	NGC 4593	Sy1	12 39 39.4435107024	-05 20 39.034988448		13.95	13.15			~	1179	0
2	NGC 5548	Sy1	14 17 59.5400291832	+25 08 12.603122268		14.35	13.73			~	2895	0

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