Short time-scale variability in bright Seyfert galaxies

Journal Article · Mon Apr 01 00:00:00 EST 1991 · Publications of the Astronomical Society of the Pacific; (United States)

DOI:https://doi.org/10.1086/132830· OSTI ID:5393038

Xanthopoulos, E; De robertis, M M ^[1]

---

1. York University, Toronto (Canada)

High-quality, long-slit CCD spectroscopic data were obtained to search for short time-scale (hour-day) variability in a sample of five Seyfert galaxies. The equivalent widths of all of the emission lines and the relative intensities of the Balmer lines were measured for each galaxy. No significant profile or flux variations were observed for any galaxy within errors, except for NGC 4151. The broad-line flux variation in NGC 4151 is attributed to continuum fluctuations. 21 refs.

• OSTI ID: 5393038
• Journal Information: Publications of the Astronomical Society of the Pacific; (United States), Vol. 103; ISSN 0004-6280
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
SEYFERT GALAXIES
BALMER LINES
EMISSION SPECTRA
CHARGE-COUPLED DEVICES
FORBIDDEN TRANSITIONS
GALAXY NUCLEI
PHOTOIONIZATION
VARIATIONS
ENERGY-LEVEL TRANSITIONS
GALAXIES
IONIZATION
SEMICONDUCTOR DEVICES
SPECTRA
640105* - Astrophysics & Cosmology- Galaxies