Next: Summary of reduction Up: Echelle Reduction Previous: Saving the Data . In the present version we will be concerned with the standard configuration of CASPEC, the Cassegrain Echelle Spectrograph which is in operation at the Cassegrain focus of the ESO 3.6 m telescope. ... In its standard configuration CASPEC uses a a 31.6 lines/mm echelle grating together with a 300 lines/mm grating cross disperser. ... The table shows the change in resolution with the order number. Table: Resolution . ...

... The flag selections are read from the DSS keywords of the input image. ... The following filters are read from the data subspace keywords of the input images and are taken into account for the calculation of the exposure maps: TIME range filters, GTI filters, CCDNR range filters, FLAG range filters, FLAG bit-mask filters. If parameter usedss is set to false, the task tries to determine the exposure time by looking for gti extensions in the input image of the form STDGTInn, STDGTIn, STDGT, or GTI. ...

COS Instrument Handbook for Cycle 24 . ... Cosmic Origins SpectrographInstrument Handbook for Cycle 24 > Chapter 3: Description and Performance of the COS Optics > 3.2 Size of a Resolution Element . ... Size of a Resolution Element . Throughout this document, we assume that a resolution element (resel) spans 6 в 10 pixels on the FUV detector (in the dispersion and cross-dispersion directions, respectively) and 3 в 3 pixels on the NUV detector ( Table 1.2 ). ...

. The description of the instrument is divided into the following sections: . Optical Design . Cryogenics and Mechanics . Electronics and Software . Determination of Detector parameters . Some photos of the instrument . Other high resolution images .

... The Miriad task uvgen can be used to simulate a variety of observing modes. ... Simulating a telescope approximately, let alone in some detail, requires a good many parameters. uvgen takes an appreciable number of parameters and input files to describe the telescope, correlator and source. Fortunately keyword and set-up files for some common situations exist ( e.g. simulating the ATCA and VLA). ... For example, to load typical parameters for the ATCA, use miriad% source $MIRCAT/uvgen.def.atca . ...

... The project assumes creation of an international space observatory - the interferometer "Earth - Space - Space" in order to perform of astronomical investigations in millimeter, submillimeter and infrared regions with extremely high sensitivity (to a few nanoJanskies units of flux density in continuum spectrum) and extremely high angular resolution (to a parts of microsecond of arc or, possibly, nanosecond). ... radio-interferometric channels of the system "Space - Space", region 0.2 - 3 mm; . ...