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Bayesian image reconstruction with space-variant noise suppression
Nunez, J.; Llacer, J.
In this paper we present a Bayesian image reconstruction algorithm with entropy prior (FMAPE) that uses a space-variant hyperparameter. The spatial variation of the hyperparameter allows different degrees of resolution in areas of different statistical characteristics, thus avoiding the large residuals resulting from algorithms that use a constant…
Surface photometry of early-type galaxies in the Hubble deep field
Fasano, G.; Filippi, M.
The detailed surface photometry of a sample of early-type galaxies in the Hubble Deep Field is presented as part of a long-term project aimed to settle strong observational constraints to the theories modelling the evolution of elliptical galaxies from the early stages. The sample has been extracted, in the V606 band, from the database …
Crowded-field photometry from HST-imaging
Thomsen, B.; Sodemann, M.
We present a thorough investigation of stellar photometry based on HST imaging of crowded fields at 85arcsec and 10arcsec from the centre of the high-surface brightness elliptical galaxy M 32. The Principal Investigators of the present archive data have elsewhere presented an impressive colour-magnitude diagram of the field at 85arcsec . Based on …