... Up: Archives and Information Services . ... The VLT Archive System goals can be summarized as follows: i) record the history of VLT observations in the long term; ii) provide a research tool - make the Science Archive another VLT instrument; iii) help VLT operations to be predictable by providing traceability of instrument performance; iv) support observation preparation and analysis. ... Figure 2: Overview of the VLT Science Archive Research Environment. ... Figure 3 illustrates the general concept...

Astronomical Data Analysis Software and Systems VII ASP Conference Series, Vol. ... Querying by Example Astronomical Archives F. Pasian and R. Smareglia Osservatorio Astronomico di Trieste, 34131 Trieste, Italy Email: pasian@ts.astro.it Abstract. ... The basic user query would simply be the submission of an input image, either 1­D or 2­D; the system should allow retrieval of archived images similar to an input one on the basis of some ``resemblance parameter''. ... the QUBE User Interface. ...

specpsf -- Form a longslit spectrum for a point source from many point spread function images specpsf refima psfwavs psfims sliwid pixwid subsam cenoff psfpos outpsf . ... The name of the input 2-dimensional reference image to supply the dimensions and header information for the output longslit Point Spread Function (PSF) spectrum image. psfwavs = "" [table file name] . ... The centre of the Point Spread Function in each input image is determined by centroiding and the slit is placed over the image. ...