Detection of the lensing galaxy in PG 1115 + 08

Details Detection of the lensing galaxy in PG 1115 + 08 Detection of the lensing galaxy in PG 1115 + 08

Apr 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986apj...303..605s&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 303, April 15, 1986, p. 605-613.

Astronomy and Astrophysics

Astrophysics

8

Astronomical Maps, Astronomical Models, Galaxies, Gravitational Lenses, Quasars, Astronomical Coordinates, Color, Magnitude, Point Spread Functions

Scientific paper

Models have been fitted to good-seeing (0.6-arcsec postguided observations of the triple quasar PG 1115 + 08 in blue and red light. The four components (A, A-prime, B, and C) all have similar point spread functions in the blue fit. There are no significant blue residuals after subtraction of the model from the image. The fits to components A, A-prime, and C in the red image are consistent, but that of the B component suggests that there is an excess red flux from an area between all four components. The residuals show that this flux has a peak magnitude of 19.8 + or - 0.3 mag in the R band and a V-R color of at least 2.7 + or - 0.5 mag. The position of this flux excess is consistent with that of the lensing galaxy in models of gravitational imaging.

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