... CALIBRATE/LINE Calculate coefficients for wavelength calibration . CENTER/.. Compute center of line . CONVERT/TABLE Make image from table values . EXTINCTION/SPECTRUM Correct 1-D image for extinction . IDENTIFY/GCURSOR Identify table entries from graphic display . IDENTIFY/LINE Equate X positions to wavelengths . INTEGRATE/GCURSOR Integrate line interactively . MODIFY/GCURSOR Change data in line interactively . ... SEARCH/LINE Search calibration lines . ...

... This thread contains a step-by-step recipe to extract MOS spectra of a point-like source observed in Imaging mode and to create associated response matrices, starting from a calibrated, concatenated event list (either produced with emproc or available as PPS product; here it has the assumed file name MOS.fits ). ... The users should note that the SAS metatask xmmselect allows them to interactively define source and background regions (via ds9) and to run backscale on the fly. ...

... Next: The PROS Big Up: Software Systems Previous: Data Reduction Software . ... The srcinten task provides PROS users with a tool to compute count rates for point sources in the ROSAT High Resolution Imager (HRI). ... Corrected upper limits are cited at locations where the count rate falls below the source detection threshold. ... Srcinten is a new PROS task that computes and applies the above correction factors to the net counts in a user-specified aperture. ...

... The x-ray spectral analysis consists of a comparison between the observed pulse height spectrum and a pulse height spectrum calculated using a given spectral model. ... To obtain the spectral parameters for an x-ray source, several steps need to be followed. For each source: . ... obtain the best fit parameters for a spectral model - repeated for each model of interest . obtain a 1-D or 2-D grid of values around the best fit values - this can be done for as many models as desired . ...

... HST . ... HST Overview . ... FGS Instrument Handbook . ... The interferometric response (in filter F583W) of the 3 original FGSs are shown in Chapter 2 of the FGS Instrument Handbook. ... For complete details on the interferometric response of FGS, please see the FGS Instrument Handbook . For other details on the FGS interferometric response, see Section 2.1.2 of the FGS Instrument Handbook. ... The HST Data Handbook is the primary guide for calibration, reduction and analysis of FGS data. ...