Deconvolution of HST images of the Cloverleaf gravitational lens
نویسندگان
چکیده
منابع مشابه
HST Observations of the Gravitational Lens Systems
High angular resolution PC1 images of the gravitational lens systems HE 1104−1805 and J03.13 are presented. Using a method described in Remy et al. (1997a), optimal TinyTim PSFs are constructed to fit at best the lensed pointlike components. The derived photometry of the GL components and the detection of the lens galaxy for HE 1104-1805 are discussed. Textbook case FOS spectra of J03.13 A and ...
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Ratnatunga et al. (1995) have recently proposed that an object, HST 14176+5226, in the " Groth-Westphal " HST survey strip is an " Einstein cross " grav-itational lens. By chance, this object has been previously observed in the Canada-France Redshift Survey. The candidate lens, catalogued as CFRS14.1311, is an elliptical galaxy at z = 0.81. In addition, the spectrum shows a strong, spatially-ex...
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Gravitational lensing can be by a faint star, a trillion stars of a galaxy, or a cluster of galaxies, and this poses a familiar struggle between particle method and mean field method. In a bottom-up approach, a puzzle has been laid on whether a quadruple lens can produce 17 images. The number of images is governed by the gravitational lens equation, and the equation for n-tuple lenses suggests ...
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Using data from the HST Medium Deep Survey, a long-term Key Project, together with generically similar archived data, we have discovered evidence for weak gravitational ‘shear’ of background field galaxies (I = 22 – 26) in the vicinity of isolated, foreground galaxies ( I = 15 – 22), especially those of early type. The statistical lensing is demonstrated by the slight preferential orientation o...
متن کاملVlbi Polarisation Images of the Gravitational Lens B0218+357
We present preliminary polarisation VLBI maps of the gravitational lens system B0218+357, made at 3 different frequencies. 1. Summary We have made VLBI polarisation observations of the gravitational lens system Reduction of the data was made using standard procedures in the AIPS software package. Preliminary maps are presented in Figure 1. The " core " and " knot " components , seen by Patnaik ...
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ژورنال
عنوان ژورنال: Astronomy & Astrophysics
سال: 2007
ISSN: 0004-6361,1432-0746
DOI: 10.1051/0004-6361:20066839