Open AccessThe optical appearance of the gravitational lens system B0218+35.7
Author(s) -
F. Grundahl,
J. Hjorth
Publication year - 1995
Publication title -
monthly notices of the royal astronomical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.058
H-Index - 383
eISSN - 1365-2966
pISSN - 0035-8711
DOI - 10.1093/mnras/275.1.l67
Subject(s) - physics , gravitational lens , photometry (optics) , galaxy , astrophysics , astronomy , strong gravitational lensing , weak gravitational lensing , telescope , line of sight , optical telescope , point spread function , lens (geology) , optics , stars , redshift
We present high-resolution CCD images (FWHM=0.6"-0.7") of the compactgravitational lens system B0218+35.7 obtained at the Nordic Optical Telescope.Using aperture and PSF photometry we detect the two closely separated (335 mas)components A and B as well as the lensing galaxy. In the optical B seems to bevery much brighter than A, opposite to the radio morphology. This suggests thatmost of the light from A is absorbed in the lensing galaxy, possibly by a giantmolecular cloud located in the line-of-sight to component A. The lensing galaxyappears to be a late-type galaxy at a small inclination. For future variabilitystudies we present calibrated photometry of the system and its immediatesurroundings, even though the relative faintness of A will make it difficult toobtain an optical time delay even with the Hubble Space Telescope
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