STScI . ... What is STScI . ... Hubble Heritage Project . ... Research . Research Staff Directory . Journal Clubs and Research Groups . Colloquia . ... Hubble Fellowships . ... Youth for Astronomy and Engineering . ... Engineering Technology Colloquia . ... Operates the science program for the Hubble Space Telescope and will conduct the science and mission operations for the James Webb Space Telescope and supports other astronomy programs and conducts world-class scientific research. ...
IRAF/STECF 2-D spectrum point source / background decomposition package . ... The general problem is one of spectral decomposition - of separating the spectra of the point sources from the background. ... The STECF IRAF layered package "specres" provides two tasks to extract point source spectra from 2-D images (either longslit, multislit or cross-dispersed) and decompose the full background over the image. ... A Point Source Function spectrum image is required as a 2-D spectrum. ...
... In the spectrometry of point sources, the advantage of obtaining long slit spectra over using single aperture spectra is that it provides a simultaneous spectrum of the background on both sides of the point source. ... The STECF IRAF layered package "specres" provides two tasks to extract point source spectra from 2-D images (either longslit, multislit or cross-dispersed) and decompose the full background over the image. ... A Point Source Function spectrum image is required as a 2-D spectrum. ...