Variability of the gravitational mirage P.G. 1115+080

Details Variability of the gravitational mirage P.G. 1115+080 Variability of the gravitational mirage P.G. 1115+080

Apr 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986a%26a...158l...5v&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 158, no. 1-2, April 1986, p. L5-L8. In French.

Astronomy and Astrophysics

Astrophysics

20

Astronomical Photometry, Gravitational Lenses, Quasars, Astronomical Models, Calibrating, Radiant Flux Density, Time Lag, Variability

Scientific paper

Photometric data on the triple quasar P.G. 1115 + 080, mostly from electronographic plates obtained between 1981 and 1985, are reported. The global flux is found to be variable with an amplitude of 0.3 magnitude on a scale of a few months, while no variations are detectable on the scale of a few days. Quasi-simultaneous variations of the three components, A, B, and C are noted, and Delta t(A,B) and Delta t(A,C) are probably less than 2.5 months. A is decomposed into A1 and A2, with observed variations of less than 0.3 magnitude, and a Delta t(A1,A2) of over four days. Results support the gravitational lens hypothesis for P.G. 1115 + 080, and allow some constraints to be put on the current model.

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