Next: *upspecrdf, downspecrdf* - Transform Up: Spectral Analysis Previous: *grid_plot* - Plot Results . The conversion of count rate to flux depends on the intrinsic spectrum of the source, so xflux must be used in conjunction with fit . Fit generates a table of the best fit intrinsic spectrum ( _int.tab extension). xflux uses this table to calculate either the integrated flux between two energy limits or the flux density at a specific energy. ... This produces ``..._obs.tab'' file. ...

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• Calculation of Extinction from Optical Colors
• Calculation of errors in smoothed arrays
• *srcinten* - Calculate Source Intensity

The following tasks belong to the category CALCULATION: . Calculations with set data'' In parentheses the name of the source file is given. ... Apply a flat field correction to a map by fitting a 2-D polynomial to the background. ( flat.c ) . ... Program to calculate flux in user defined box. ( flux.c ) . ... RESWRI derives the kinematical parameters from the observed velocity field by fitting tilted-rings to the velocity field and fits harmonic terms after convergence of the ROTCUR part of code. ...

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• Doing lengthy calculations from a GUI
• Calculation of the average drift angle
• casacore: casa::Aberration Class Reference

... Meade Instruments Corporation . ... How to Calculate Power . How to Calculate Power: The magnification, or power, at which a telescope is operating is a function of the focal length of the telescope's main (objective) lens (or primary mirror) and the focal length of the eyepiece employed. ... Example: The Meade DS-2070AT telescope has an objective lens focal length of 700mm; when this telescope is used with a 25mm eyepiece, a power of 700/25 = 28 power (written as "28x") results. ... about meade | ...

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... The cross entropy for this complex image is given by ( 16 ) and ( 17 ). ... Differentiating ( 31 ) with respect to and , we find the gradient of is given by . and upon differentiating once more we find the Hessian (curvature) matrix of has the form . ... and its Hessian matrix reads . ... From ( 16 ) and ( 17 ), we find the components of the gradient vector of the cross entropy are given by . ... Differentiating once more we find the components of the Hessian of the cross entropy to be given by . ...

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• Bojan Nikolic -- Calculating dispersive path delay due to the atmosphere
• DUST: dustiface.h File Reference
• DUST: equidust.cxx File Reference

Blackholes Forum Message . ... So How Can We Calculate The Mass Of The BH? ... Posted by Lukas on January 25, 2005 14:00:31 UTC . ... Gravity is the weakest force of all - secretary - January 25, 2005 - 18:53 UTC . Singularity - bazukaz - January 25, 2005 - 23:19 UTC . Only in theory - secretary - January 26, 2005 - 02:15 UTC . ... www.astronomy.net . ... Forum posts are Copyright their authors as specified in the heading above the post. "dbHTML," "AstroGuide," "ASTRONOMY.NET" & "VA.NET" . ...

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• Magnification (Power) And Using Eyepieces - an Astronomy Net Article
• Astronomy Terms - To Help You Study The Universe - an Astronomy Net Article

... 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. ...

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• Calculating the Position and Velocity Components of HST
• Modelling Spectro-photometric Characteristics of Nonradially Pulsating Stars
• ADASS VI Cover Page

This diagram shows the six superimposed "layers" of the CSS table model. This diagram illustrates the algorithm for calculating a cell's final background. ... The diagram shows how, looking down on the six rectangles, one may compute the background color of each cell. ... A cell without a background color in the top layer is depicted as a "window" onto the lower layers, which give its final background color. ...

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• Long description of example illustrating background calculation
• Long description of example illustrating table row height calculations and
• Recursion

Input function: . Input X: .

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• Database of Optical Properties -- Level: subpage
• AI SPbU library of scattering codes
• Database of Optical Constants -- Level: welcome

As it is in Ephemerides task, O–C can be calculated with different accuracy. ... It presents three modes of accuracy. One can calculate position of a minor planet by the formulae of elliptic motion starting from the fundamental set of elements for given minor planet. ... Also there is possibility to calculate positions taking into account perturbations from different sets of perturbing bodies by numerical integration ( Integration mode). ... Accuracy of integration is equal to 10**(–10) AU. ...

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• LAB Ephem. Astronomy-ERA

... The file names' construction . The flight (m) stage's file set . ... the orbital data used for the flight operation monthly (m) long-term planning, . ... The orbital calculations are based on the initial orbital data determined by KIAM RAN using the orbital radio- measurement treatment. The determined initial orbital data are presented as a state vector (satellite position and velocity) in the J2000 reference. ... Accept the file with extension '.bgr', where the Moscow time (MT=UT+3h) is used. ...

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• About modification of the INTERBALL orbital elements
• Prediction technique
• The INTERBALL Auroral PROBE orbital elements collections

... Tonight's Sky . ... Astronomy for Kids . ... Do orbital motions between galaxies affect calculations of the cosmological redshift? ... RELATED TOPICS: COSMOLOGICAL REDSHIFT . ... The observed redshift, or wavelength shift due to motion, of a galaxy s characteristic light spectrum is a combination of the galaxy s motion with respect to its neighbors ( peculiar velocity ) and the expansion of the universe ( cosmological redshift ). ... Get instant access to subscriber content on Astronomy.com! ...

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Russian SHAREABLE DATA CENTER Institute of Solar-Terrestial Physics SB RAS . ... The algorithm and appropriate program for decametric radiosignal propagation conditions prediction for paths from 500 to 9000 km have been developed at ISTP SB on the basis of normal wave method (AltyntsevaB.I,Iliyin N.V., Kurkin V.I. and others //Decameters channel simulation on the base of normal wave method . ... Solar activity indices are chosen automatically from the prediction date from the database . ...

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• East Siberian Center for the Earth's Ionosphere Research. VS data on-line

... The SDSS 2.5-m primary mirror is supported in a manner similar to the Apache Point Observatory 3.5-m telescope primary. ... The axial support is provided by 48 air pistons. The pistons have the same diameter thereby applying equal forces with the same air pressure. ... Each group supports a 120њ sector of the mirror. ... Figure 1: CAD drawing showing the 2.5-m primary mirror and the locations of actuators (green circles) These actuators apply forces (10*cos2 N) to correct astigmatism. ...

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• Appendix B
• Tolerances

... The plot widgets as shown below are created using Calibrate|Visibility|PLOT . The one on the left is the general plot selection widget, the one on the right, the (data) index selection widget, is created when additional input is required as to the indices of the selected data. ... The calibration is applied to all stars selected in the plot selection widget. ... Below is the screen print after clicking on "Calibrate". Solution calculated for OB= 1, Bl= 1, Ch= 2. RMS [%] = 1.876) . ...

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• pyQC: script structure
• ESO - Observing Time Calcaulation for APEX Instruments Artemis and Supercam
• ESO - Science Announcements

National Research Institute for Physical-Technical and Radio Engineering Measurements IMPROVEMENT OF THE SOFTWARE BERNESE FOR CALCULATION OF THE EARTH ROTATION PARAMETERS ACCORDING TO THE DATA OF SATELLITE LASER RANGING (LAGEOS 1, LAGEOS 2) IN THE MAIN METROLOGICAL CENTRE OF THE STATE TIME AND FREQUENCY SERVICE Tsyba E. N., Kaufman M. B. 141570, Mendeleevo, Moscow region, Russia tel. +7-903-194-7575; tsyba_e_n@mail.ru ABSTRACT Preparatory ...

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• http://www.gao.spb.ru/russian/psas/ffk2013/tfiles/yerokhin_H2_FFK13.pdf
• Pulkovo NEO Page: Ephemeris Support
• Pulkovo NEO Page: Estimation of Accuracy of the Observations

RATAN-600 radio telescope . ... In the "radio-Shmidt telescope" mode the antenna system the South sector of the main mirror with the flat mirror ("South+Flat") of the RATAN-600 radio telescope is used. ... The antenna system the South sector with the flat mirror. ... The flat and circular mirrors of the RATAN-600 form the basis of the system. ... In the case of antenna system "South+Flat" the planoid is flat mirror, the circular reflector of RATAN-600 is the second mirror. ...

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• Determination of atmospheric parameters and calculation of chemical composition
• harak_e
• RATAN-600 siderial time service

... References: %observed energy levels: Del Zanna and Mason, 2005, A , 433, 731 %theoretical energy levels (second column): Storey, Del Zanna, Mason, Zeippen, 2005, A , 433, 717 (scattering calculation) %theoretical energies (third column): Del Zanna and Mason, 2005, A , 433, 731 (SUPERSTRUCTURE calculation with term energy correction) %produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration % % Giulio Del Zanna - June 7 2005 . ...

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• CHIANTI: A Database for Astrophysical Emission Line Spectroscopy

... Armagh Observatory, College Hill, Armagh BT61 9DG, +44 (0)28 3752 2928 . ... Time-dependent stratification profiles тАУ logarithm of the abundance relative to hydrogen (log Ab(H) = 12.0) vs. optical depth тАУ of Cr in a Kurucz Atlas12 atmosphere with T eff = 12000 K and log g = 4.0. Zero field case; the ages are given in years. ... We present time-dependent, self-consistent diffusion calculations for Cr, Mn and Fe in a T eff = 12000K and log g = 4.0 stellar atmosphere. ...

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• Postdoctoral Research Assistant
• MARTIAN SKY CALCULATOR
• Abstract

... Classes . ... gTime Class Reference . This class implements time calculations. ... gTime (double ai_jDays=0) . ... gTime (const gTime &timeSrc) . ... Set the time value of the time object to the julian day of year, day. ... operator= (const gTime &timeSrc) . ... Returns the time GMT value in Julian days. ... Returns the time_t value of the gTime Object. ... Returns a gTime object setted with the actual machine time. ... gTime Object assigned with real machine time. double gTime::getGmtTm . ...

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• Stellarium:
• Alter World
• Stellarium: core/planetsephems/tass17.h Source File

Welcome to K -corrections calculator, simple service allowing one to determine K -corrections of a galaxy, given its redshift and one or more colours. ... K -correction in choose filter.. ... Redshift . Colour choose colour.. Colour value . Calculator . ... calculate spectral energy distributions , K-corrections calculator , GALEX FUV NUV , UKIDSS YJHK , K-corrections of galaxies , spectral based k-corrections , SDSS filter set K-corrections , K correction code IDL , kcorrect IDL C , . ...

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• K-corrections calculator (version 2010)