... Huchtmeier Richter A catalog of all published HI observations of external galaxies has been compiled. ... the morphological type (internally coded in a crude 1-byte code based on the system of the RC2 Second Reference Catalog of Bright Galaxies (de Vaucouleurs et al, 1976)) in column 4; . the inclination i (in degrees) used by the authors in column 5. ... A General Catalog of HI Observations of External Galaxies by W.K. Huchtmeier O.-G. Richter, H.D. Bohnenstengel and M.Hauschildt May 1983. ...

Next: RGCV for Steepest Up: Generalized Cross-Validation as a Previous: The Richardson-Lucy Algorithm . Cross-validation divides the data into two sets. ... Extending this concept, generalized cross-validation (GCV) uses each data point as the testing set, and then averages a weighted prediction error over the entire data set (Golub et al. ... The main drawback of the GCV criterion comes from the denominator of . ... and is now called the Randomized GCV (RGCV) criterion. ...

... Consequently, it is inappropriate to expand and in ordinary spherical harmonics. The proper expansion expresses both and simultaneously in terms of a particular order of generalized spherical harmonics. ... Generalized spherical harmonics start at , and for each , . ... Generalized spherical harmonics obey a sum rule analogous to a familiar one for ordinary spherical harmonics, but it includes an explicit phase factor which depends on the orientation of the two lines of sight. ...

It is a matter of common knowledge that in processes of genesis and evolution of many solar phenomena participate magnetic fields of sunspots. ... As a basis for formation of the database we take data on magnetic fields, collected by set of observatories during many years of observations. ... Section "Magnetic field data" contains data of magnetic field observation for separate sunspots, presented in standard text format (ASCII). ... Description of structure of these files is presented here . ...

General Knowleges about Astrometry. ... Universal Tool, Meridian Tool, Meridian Circle, Vertical, Photografic Zenithal Telescope, Astrolabe, Zenith Telescope, Horizontal Meridian Circle, etc. Meridian Principle of Objects' Coordinates Determination. ... Absolute and Relative Methods of Coordinates Determination. ... Photografic Method in Astrometry. Telescopes for Position Observations by Photografic Method. ... Basis and Theory of Photografic Method of Coordinates Determination. ...

Next: Photometry Up: Regions and Source Parameters Previous: *imcnts* - Find counts . This task (developed for use with optical images, but also useful with x-ray data) will quickly compute location, size, ellipticity, and position angle of sources. ... User can generate contour plots of any portion of the image and count rates in slices through the image. The program is advertised as ``quick [optical] photometry''. input file: rp110590_im1.imh . output file: logfile . ... Photometry . ...

... Depending on the observation mode a certain fraction of the events recorded are due to out-of-time events (OoTE), i.e. are registered during readout of a CCD and thus will be assigned an incorrect position in RAWY and consequently an incorrect CTI correction. ... Out-of-time events have a much lower exposure per pixel per read-oiut frame, namely reduced by the number of pixel shifts during readout and by the abovementioned ratio of readout and cycle time. ...

The following general subroutines belong to the category CONVOLUTION: . ... Determine parameters of 2d-gaussian needed to convolve 'oldbeam' to 'newbeam' ( convpars.shl ) . ... Fill array with values of (rotated) 2-d Gauss ( fillgauss2d.c ) . ... Calculate convolution function parameters for use in smoothing to a bigger (rotated) beam and determine scale factor to be able to preserve definition of brightness temperature. ( presmooth.shl ) . ...

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