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Title:
A highly X-ray-variable active galactic nucleus near M101 - A microlensing candidate
Authors:
Trinchieri, G.; Fabbiano, G.; Elvis, Martin
Affiliation:
AA(Harvard-Smithsonian Center for Astrophysics, Cambridge, MA), AB(Harvard-Smithsonian Center for Astrophysics, Cambridge, MA), AC(Harvard-Smithsonian Center for Astrophysics, Cambridge, MA)
Publication:
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 356, June 20, 1990, p. 430, 431. Research supported by ASI. (ApJ Homepage)
Publication Date:
06/1990
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
Active Galactic Nuclei, Gravitational Lenses, Spiral Galaxies, X Ray Sources, Emission Spectra, Heao 2, Quasars
DOI:
10.1086/168850
Bibliographic Code:
1990ApJ...356..430T

Abstract

The X-ray selected active galaxy 1E 1403 + 5439 has been found to increase its X-ray flux by a factor 5.5 + or - 1.9 over an interval of 161 days. No other X-ray selected emission line active galaxy has been observed to vary by such a large factor. The X-ray source 1E 1403 + 5439 lies about 18 arcmin from the center of the large spiral galaxy M101. This proximity suggests that gravitational microlensing may be responsible for the extraordinary variability of this active galaxy.

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