... pixel--pixel space: corresponds to 2D raw images, with the sampling units PIXEL in both dimensions. pixel--order space: corresponds to 2D extracted images, produced by the command EXTRACT/ECHELLE . Unit in the x --axis is PIXEL , unit in the y --axis is ORDER , sequential echelle order number. wavelength--order space: corresponds to 2D extracted images, with uniform sampling steps in wavelength, produced by the command REBIN/ECHELLE . ... These images are produced by the command MERGE/ECHELLE . ...

The database contains references to the papers, data files and links to the Internet resources related to measurements and calculations of the optical constants in the wavelength interval from X-rays to radio domain. ... References to some useful books and reviews on the subject (e.g. the classical handbooks edited by E.D.Palik) and links to Internet collections of optical constants and personal WWW pages with related software were also placed in the database. You have arrived at our welcome page. ...

TUI supports the following offsets: . Object Arc offset by a given amount on the sky (i.e. along the arc of a great circle). ... Arc offsets are useful for moving a different portion of your object or a different nearby object onto the boresight . ... Object Arc XY this is identical to an Object offset except that it has been rotated to align along the instrument x-y axes. ... This is just like the Calibration XY offset, except that it is typically cleared when you slew to a new object. ...

... This function can also be used for particular types of subtypes or kinds: KIND (0) integer KIND (0.0) floating point number KIND (.FALSE.) logical variable KIND ("A") string of characters There is an intrinsic function SELECTED_REAL_KIND , which returns the kind of the type REAL that has a representation with (at least) the precision and the exponential range requested. ... With the choice SELECTED_INT_KIND (5) all integers between (but not including the limits) -100 000 and +100 000 are permitted. ...

... Information about a variety of different calendars for different cultures (e.g., Christian, Jewish, Muslim, Chinese, Hindu etc.) ... In addition, the Chinese had two different ways of interpreting and observing celestial events. One way the Chinese used astronomy was known as lifa; it was a discipline that aimed to understand the regularities and the predictable events in the celestial system through careful, observations, measurements and records. ... back to Teachers' Newsletter Main Page ...

Sed's command line syntax essentially means this: . ... sed 's/^\(.......\).*$/$do copy_visit_into_lrp 98259A 98259X \1/' ~jordan/98285 . sed . invokes sed. what follows is the script which is placed inside single quotes: . ... The first "/" is the beginning of the pattern matching delimiter. ^ . ... end grab.* . ... end of line! . ... Use of a file ~jordan/sed_script to store a sed script which is difficult to do from a command line. The script file ~jordan/sed_script contains: . ...

SAS home . SAS Watchout items . ... This thread contains a step-by-step recipe to extract a light curve of a point-like source for all the X-ray cameras, subtracting the background and correcting for exposure loses. ... The SAS task barycen performs this correction. ... If the following files are available: a) RGS event list; b) RGS source list, a call to the task performing light curve extraction, correction and background subtraction rgslccorr allows a user to create the light curve. ...

... Data may be optionally rescaled. copyheader copy header keywords from one FITS file to another ( see also FTOOL cphead ). copywcs copy just the World Coordinate System keywords from the header of one FITS image to others. fcolappend append a constant column to a FITS table fitsparsename Prints components of the extended FITS file name. fitspha convert ASCII files to FITS PHA ( See also listhead supplied with FITSIO. modifyheader modifies FITS header.