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1. Standard Patterns for Substepping and Background Measurement
... This table shows how each STEP-PATT pattern measures the background for a science exposure. Listed are the STEP-PATT number, the number of spectrum bins for which substepping occurs, the number of background bins measured, the diodes used to measure the background, the fraction of the total time spent measuring flux on the science diodes, the gratings for which the STEP-PATT is appropriate, and the shortest exposure that can be used for that pattern. ... Table 8.3: - STEP-PATT Specifications . ...
[ Сохраненная копия ]  Ссылки http://www.stsci.edu/instrument-news/handbooks/ghrs/GHRS_46.html -- 3.4 Кб -- 14.02.1996
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2. WAPP Signal Processing Page
The Wideband Arecibo Pulsar Processor Signal Processing Page . ... Raw Correlation . ... The WAPP uses custom digital hardware to create estimates of correlation functions from sampled data. The digital hardware used to estimate correlation function uses quantization to represent input . After creating an estimate of input correlation functions, the Wiener-Khintchine Theorem is applied to create estimates of input Power spectral density (PSD) and Stokes parameters . ... 3 Level . ...
[ Сохраненная копия ]  Ссылки http://www.naic.edu/~wapp/SignalProc/SPMain.htm -- 8.9 Кб -- 20.04.2000
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3. Channel Selection, Averaging and Doppler Correction - UV Linetypes
... Many Miriad tasks support on-the-fly selection and averaging of the channels to be processed. ... Channel-0' data (data formed by averaging all spectral channels together) are also treated as continuum data. ... For the spectral data, if the channel number does not correspond reasonably directly with velocity ( e.g. if Doppler tracking was not used), then it might be desirable to resample the spectral data at equal increments in velocity. ... channel . This gives raw or averaged spectral channels. ...
[ Сохраненная копия ]  Ссылки http://www.atnf.csiro.au/computing/software/miriad/userguide/node35.html -- 10.8 Кб -- 10.04.2016
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4. THE HUBBLE LAW JAVA APPLET
These are very prominent absorption lines is most all galaxies. ... These pair of absorption lines will appear in all the spectra and they should be your principle source for determining the redshift. ... When this applet opens you will see an iconic representation of galaxies in the left hand side of the applet and a target area in the right side of the applet. ... Note: What you are doing in this excercise is identical to what Hubble did in the 1920's and you are using the same galaxies. ...
[ Сохраненная копия ]  Ссылки http://zebu.uoregon.edu/2002/ph123/hub.html -- 5.5 Кб -- 09.07.2001
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5. Correction of the energy scale in specific pixels
... Ideally, this map contains the energy offset for each pixel (expressed in analog-to-digital units, adu). ... High-energy particles hitting the EPIC pn CCD during the offset map calculation may cause the affected pixels to get offset values which are incorrect by a few adu. ... Due to the specific method of deriving the offset map onboard, the affected areas occur often in blocks of four consecutive pixels along readout direction. ... The affected pixels usually get an offset which is too small. ...
[ Сохраненная копия ]  Ссылки http://xmm.vilspa.esa.es/sas/6.1.0/doc/epreject/node4.html -- 14.6 Кб -- 22.11.2004
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6. http://www.mso.anu.edu.au/pfrancis/ObsTech/Ass4.pdf
... A theory suggests that a certain sub-class of gamma-ray bursts all have the same absolute magnitude. ... The author claims that this absolute magnitude is so different from that in the previous sample that this must belong to a new sub-class of gamma-ray bursts. ... To do this, there needs to be some feature in their spectra which correlates with their absolute magnitude. ... Consider a telescope which is continually monitoring a star, looking for transits due to planets orbiting this star. ...
[ Текст ]  Ссылки http://www.mso.anu.edu.au/pfrancis/ObsTech/Ass4.pdf -- 86.3 Кб -- 04.05.2007
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7. The AstroStat Slog Blog Archive Differential Emission Measure [Eqn]
... Archives . ... Magnitude [Eqn] . ... Differential Emission Measures (DEMs) are a summary of the temperature structure of the outer atmospheres (aka coronae) of stars, and are usually derived from a select subset of line fluxes. ... is called the Differential Emission Measure and is a very useful summary of the temperature structure of stellar coronae. ... Tags: DEM , Differential Emission Measure , EotW , Equation , Equation of the Week , stellar coronae . ... Comment ( RSS ) | ... Chandra Blog . ...
[ Сохраненная копия ]  Ссылки http://hea-www.harvard.edu/AstroStat/slog/groundtruth.info/AstroStat/slog/2008/eotw-dem/index.html -- 24.3 Кб -- 01.03.2014
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8. http://selena.sai.msu.ru/Pug/Publications/ms34/MS058.pdf
Microsymposium 34, MS058, 2001 ANOMALIES OF THE MOON'S THERMAL EMISSION IN THE IR SPECTRAL RANGE (10.5 - 12.5 micron). ... Sternberg State Astronomical Institute, Moscow, 119899, Russia, pugach@sai.msu.ru Summary: New satellite measurements of the lunar-surface radiation temperature were used to construct the spatial angular function of thermal radiation of the Moon in the infrared (10.5-12.5 micron) spectral range. ... These thermal anomalies are observed only in the limited range of phase angles. ...
[ Текст ]  Ссылки http://selena.sai.msu.ru/Pug/Publications/ms34/MS058.pdf -- 568.0 Кб -- 06.10.2008
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9. http://www.sao.ru/drabek/CCDP/Abstracts/2/IWDMa69.html
Application of X-ray Crystallographic Detector to Whole Breast Digital Mammography . ... Our system is composed of modules in which a gadolinium oxysulfide phosphor is deposited directly onto a fiber optic taper which is bonded to a CCD. ... We present measured MTF and light output data from Gd2O2S:Tb phosphors of various thicknesses, and discuss implications for the developmental breast imaging detector. ... The measured module MTF is significantly poorer than that of its phosphor alone (Figure 1). ...
[ Сохраненная копия ]  Ссылки http://www.sao.ru/drabek/CCDP/Abstracts/2/IWDMa69.html -- 8.6 Кб -- 09.09.1998
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10. Interactive Fitting of EUVE Emission Line Spectra
... An interactive IRAF task for the analysis of Extreme Ultraviolet Explorer ( EUVE ) emission line spectra is presented. The line flux in extracted spectra may be measured by multiple techniques, including fitting individual lines. ... To aid in identifying lines, the positions of known lines may be marked on the spectrum during the fitting process. Also, model EUVE spectra may be constructed and overlaid using plasma emissivities and source emission measures supplied by the user. ...
[ Сохраненная копия ]  Ссылки http://www.adass.org/adass/proceedings/adass94/abbottm.html -- 8.6 Кб -- 03.11.2000
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11. Thomson's method of spectral estimation
... Thomson's multiple window method of spectral estimationthomson provides a very good estimate of the power spectrum by measuring the energy contained within a collection of rectangular shaped frequency intervals. ... Often, much of the fine structure of a spectral estimate is due to noise. It should be stressed that while other methods of spectral estimation (such as the Welchoppenheim method) exist, the Thomson method is particularly noteworthy for its precisely defined rectangular frequency bins. ...
[ Сохраненная копия ]  Ссылки http://crydee.sai.msu.ru/~vab/Wavelet.rsc/Chirplet.dir/node12.html -- 5.5 Кб -- 15.04.1998
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