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1. Reducing 3-mm ATCA observations
Next: Some theory Up: userhtml Previous: Calibration . By many measures, the ATCA 3-mm observing band is a completely different domain to the other ATCA bands. ... Not surprisingly many aspects of the data reduction are also different. This chapter reviews the theory behind some of the differences, and then considers a practical approach to calibration. ... Antenna gain considerations and flux calibration . Instrumental phase . Atmospheric phase and phase calibration considerations . ...
[ Сохраненная копия ]  Ссылки http://www.atnf.csiro.au/computing/software/miriad/userguide/node200.html -- 5.0 Кб -- 10.04.2016
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2. Optimization of spectroscopic observations
... Let us first find out which way -- rise in spectral resolution with some loss in the S/N ratio or increase in the S/N ratio with a fixed spectral resolution -- is better for the purpose of reduction of equivalent width determination errors. ... N -- number of counts for 1 ? ... line equivalent width, . ... Thus if the spectral resolution is managed to be increased (i.e. to decrease )without loss in the number of counts falling at 1 ?, the equivalent width measurement error is then proportional to . ...
[ Сохраненная копия ]  Ссылки http://mavr.sao.ru/hq/ssl/PFES/node2.html -- 13.9 Кб -- 02.10.2012
[ Сохраненная копия ]  Ссылки http://www.sao.ru/hq/ssl/PFES/node2.html -- 13.9 Кб -- 01.10.2012
[ Сохраненная копия ]  Ссылки http://jet.sao.ru/hq/ssl/PFES/node2.html -- 13.9 Кб -- 01.10.2012
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3. Accuracy of World positional CCD observations of the numbered minor planets
... Contact A Problem of an estimation of accuracy of the asteroid CCD observations . The Minor Planet Center supported by the Interntional Astronomical Union is the main office for keeping observational data of the small Solar System bodies and their investigations. ... At Pulkovo Observatory we are estimating an accuracy of the CCD asteroid observations obtained by amateurs and professional astronomers all over the World using the MPC database. ...
[ Сохраненная копия ]  Ссылки http://www.accuracy.puldb.ru/PROBLEM.HTM -- 3.9 Кб -- 05.12.2007
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4. Atmospheric influence on the different radioengineering systems functioning.
Atmospheric influence on the different radio-engineering system functioning . ESTIMATION OF ATMOSPHERIC OPTICAL CHARACTERISTICS AND REMOTELY SANSED IMAGE CORRECTION . ... Direct transmittance estimation results for 12 channels of the spectrometer CHRIS. ... We have managed to develop a direct method of estimating the discrete Normalized Atmospheric Point Spread Function (NAPSF) from available images alone, not using any external sources of information about the atmosphere. ... IRE RAS 1996-20 11 ...
[ Сохраненная копия ]  Ссылки http://www.cplire.ru/html/atm/correction.html -- 19.8 Кб -- 18.10.2011
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5. ULTRACAM Observations of Subdwarf B Stars
Next: First CCD Observations of Up: Highlights Previous: Origin of Stars Contents . Subdwarf B stars are highly evolved stars which pulsate non-radially in several modes with different frequencies. ... Over 60,000 images were obtained, which when played in sequence show the star's oscillations in red, green and ultraviolet light. ... Figure 3: ULTRACAM light curve for PG0014+067, from 2004 August 20 to 2004 August 25 (top to bottom). ...
[ Сохраненная копия ]  Ссылки http://star.arm.ac.uk/annrep/annrep2004/node19.html -- 6.1 Кб -- 19.04.2005
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6. Database of Optical Constants -- Level: welcome
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. ...
[ Сохраненная копия ]  Ссылки http://www.astro.spbu.ru/JPDOC/ -- 10.8 Кб -- 19.11.2010
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7. The AstroStat Slog Blog Archive different views
... Archives . ... If you do not mind the time predictor, it is hard to believe that this is a light curve, time dependent data. ... It?s hard to say this data set is designed for time series analysis apart from the complication in statistical inference due to measurement errors. How to design the statistical study with measurement errors, huge gaps in time, and unequal time intervals is complex and unexplored. ... The following is R output without measurement errors. ... Chandra Blog . ...
[ Сохраненная копия ]  Ссылки http://hea-www.harvard.edu/AstroStat/slog/groundtruth.info/AstroStat/slog/2009/filters-are-differen/index.html -- 23.8 Кб -- 01.03.2014
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8. FM-3I Instrument
Magnetic field measurements onboard the Interball Tail spacecraft are carried out by the FM-3I instrument which consists of two flux-gate magnetometers covering two different ranges: [-200, +200] nT and [-1000, +1000] nT. Besides scientific goals, the FM-3I experiment data is used to perform the attitude control of the Interball Tail spacecraft. ... August 22, 1995 . ... October 18, 1995 . Top of the page . ... Back to the Interball Home Page . ...
[ Сохраненная копия ]  Ссылки http://www.iki.rssi.ru/fm-3i.html -- 2.7 Кб -- 24.05.1996
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9. Distributed Software for Observations in the Near Infrared
... We have developed an integrated system that performs astronomical observations in Near Infrared bands operating two-dimensional instruments at the Italian National Infrared Facility's ARNICA and LONGSP . ... The user interface is organized as widget-based X11 client. ... 1993; Di Giacomo et al. 1993). ... Moreover, if the interprocess communication interface includes support for networking, the software immediately becomes network distributed software. ... DESQview/X User Guide 1993, Quarterdeck . ...
[ Сохраненная копия ]  Ссылки http://www.adass.org/adass/proceedings/adass94/gavryusevv.html -- 9.9 Кб -- 03.11.2000
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10. Vladimir Marsakov Abstracts
Authors: Yu.G. Shevelev , V.A. Marsakov , . ... We have constructed and investigated properties of metallicity function of disk stars with different ages, proceeding from the statistically restored real altitude distributions of stars at the solar galactocentric distance. It is shown that the metallicity distribution of stars in each age range is not of Gaussian form, but it may be considered as a superposition of two normal distributions centered at -0.2 and 0.0 dex. ...
[ Сохраненная копия ]  Ссылки http://ip.rsu.ru/~marsakov/abs/abst28.htm -- 4.1 Кб -- 02.02.2007
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11. ASP: Beacons in the Gloom
... In one situation, we can use light from quasars to probe the material between us and them because that light may pass through one or more galaxies or gas clouds on its way to us. The gas inside the galaxies or the intergalactic clouds acts then as a filter, absorbing selected wavelengths from the quasar light. ... Light from a quasar must pass through clouds of gas and even faint galaxies -- each leaving its imprint on the light -- before we receive it here on Earth. ... Gravitational lensing . ...
[ Сохраненная копия ]  Ссылки http://www.astrosociety.org/edu/publications/tnl/46/quasars3.html -- 11.1 Кб -- 02.10.2012
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12. http://www.gao.spb.ru/english/as/j2014/presentations/perepelkin.pdf
Irregular phenomena in the Earth Pole oscillation process and temporal variations of geopotential Valery Bondarenko, Vadim Perepelkin s The observed irregular phenomena in the Earth Pole oscillation process are very variety. ... These phenomena indicated in the IERS data are the "abnormal" fluctuation of the Earth Pole coordinates which owing to changing of the geodynamical parameters gives negative result in interpolation and forecast of the first approximation mathematical model. ... Fig. ...
[ Текст ]  Ссылки http://www.gao.spb.ru/english/as/j2014/presentations/perepelkin.pdf -- 900.8 Кб -- 30.10.2014