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1979•Monthly Notices of the Royal Astronomical SocietyRequires access

NGC 4593 - a bright Seyfert galaxy with variable X-ray emission

S. J. Bell Burnell, J. L. Culhane

Open publisher page 6 citations

Abstract

Ariel V observations of the X-ray source 4U 1240 – 05 support suggestions that it should be identified with the galaxy NGC 4593 recently found to be a type 1 Seyfert. Data on the source position and spectrum are presented. The X-ray intensity appears to have varied by a factor of more than two since the Uhuru observation.

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What this paper is about

Ariel V observations of the X-ray source 4U 1240 – 05 support suggestions that it should be identified with the galaxy NGC 4593 recently found to be a type 1 Seyfert. Data on the source position and spectrum are presented. The X-ray intensity appears to have varied by a factor of more than two since the Uhuru observation.

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OpenAlex reports 6 citations for this work. Citation counts describe recorded attention and do not establish research quality.

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Available abstract

Ariel V observations of the X-ray source 4U 1240 – 05 support suggestions that it should be identified with the galaxy NGC 4593 recently found to be a type 1 Seyfert. Data on the source position and spectrum are presented. The X-ray intensity appears to have varied by a factor of more than two since the Uhuru observation.

Key concepts: Physics, Astrophysics, Galaxy, X-ray, Astronomy, Emission spectrum, Spectral line, Optics

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