... Previous: Substepping and its Application to HST Imaging . ... This is a preliminary report on an application of the co-addition technique based upon the Richardson-Lucy algorithm. The combination of high signal-to-noise ground-based images obtained with the ESO NTT using SUSI with high angular resolution HST FOC f/96 images gives new insights on the properties of galaxy cores and their potential time variability. Cores of galaxies are one of the main thrusts of present extragalactic research. ...

... Fitting and Modeling of AXAF Data with the ASC Fitting Application S. Doe, M. Ljungberg, A. Siemiginowska and W. Joye AXAF Science Center, MS 81, Smithsonian Astrophysical Observatory, 60 Garden Street, Cambridge, MA 02138 USA Abstract. ... Fitting and Modeling of AXAF Data 159 MODEL MANAGER FIT STATISTIC MANAGER MANAGER SRC BKGD INSTR MODEL = SRC + BKGD * INSTR MODELS MODELS MODELS MANAGER MANAGER STATS METHODS OPTIMIZATION METHOD MANAGER Figure 3. The Model, Method, and Statistic Managers. ...

specinholucy -- Extract point source spectra from longslit spectrum image with inhomogeneous background spectrum using an iterative technique based on Richardson-Lucy restoration specinholucy inpima errima dqima poitab Rootab poi_back bakima bakerr bakdq psfima psfmeth psfb interpol posmeth icsum skernel niter epspoi epsbac ntrial seed dqlim verbose . ... The name of the input longslit spectrum image. errima = "" [file name] . ... Point sources and background spectra NOT converged !- ...