... This paper describes various methods for the analysis of spectroscopic data, particularly as they relate to wavelength calibration of echelle-format spectra. ... Keywords: spectroscopy, Hough transform, wavelet transform, robust regression, echelle, wavelength calibration . ... Wavelet transform can be useful in complementing robust techniques for multiresolution analysis, and Section 4 presents an application of the Mexican hat transform to the detection of spectral features. ...

... It lists the coefficients defining the colour transformations, the zero points for the different filters and the aperture radii used in the photometric calibration analysis. ... The AB system zero point of the filter FilterID is stored in the keyword ABM0 FilterID , e.g. the AB zero point of the the U-filter is stored in ABM0U. The flux conversion factor derived from White Dwarfs of the filter FilterID is stored in the keyword FCF FilterID . ... description . ... AB Flux conversion factor of U . ...

Next: Wavelength calibration Up: Getting Started Previous: Detecting lines in . ... and the Calibration Starting Row will be used for the lines identifications. ... After setting these parameters, click the button. to pop up the Identify window. ... The identification starts by clicking on , which plots one row of the spectrum in the graphic window, indicates the position of the detected arc lines with blue vertical traces and gives a cursor. ... Figure: Lines Identification Window . ...

Next: Transform of modulated Up: No Title Previous: Frequency/duration relation. Let us now turn to gradually more complicated signals, for which we soon lose the support of analytical expressions of the transforms. First, examine the sum of 3 cosine waves at different frequencies and phases. The Mexican hat wavelet analysis is carried out as above, yielding the wavelet map (Fig. ... Figure 11: g2 transform of a multiperiodic signal. ... Mon Nov 13 10:51:25 EST 1995 ...

... We also identified two other spectrally unique terrains, corresponding to the northern polar ice cap, and to the southern winter polar hood. Comparisons with mineral spectra indicate the possibility of different H 2O- or OH-bearing (i.e., hydroxides and/or hydrates) minerals existing both in northern Acidalia and in the nearby intermediate albedo terrain. Hydrated minerals do not appear to be spectrally important components of the southern hemisphere dark terrains imaged by HST in 1997. ...

... Left: Black hole systems with high mass companions in blue, black hole systems with low mass companions in green, X-ray pulsars in red, and non-pulsing neutron star systems in Magenta. ... Left: Black hole systems with low-mass companions in green; black hole systems with high-mass companions in blue. Right: Persistent black hole systems in blue; transient black hole systems in green. ... Bhaskar Balaji Unionville High School Summer 2012 . Robert Sylvia Medfield High School Summer 2011 . ...

Application of IVOA software tools for radio sources investigation Zhelenkova O., Kopylov A., Chernenkov V. The interrelationship between the objects of astronomical catalogs in the different ranges of electromagnetic spectrum and their association into the real astrophysical source has obvious scientific interest. ... We used NVSS as the reference coordinate catalog. ... For 60% of radio sources identified with the objects of the radio catalogs we discovered optical candidates in SDSS survey. ...

Next: The STScI NICMOS Calibration Up: No Title Previous: CONICA: The high resolution . The STScI NICMOS Calibration Pipeline . Introduction . ... Dark Current Subtraction . ... Input Data . ... Scalar Background Subtraction . 2-D Background Subtraction . ... Status and Goals of the NICMOS Calibration Plan . ... Photometry . ... Photometric Performance of NICMOS . ... NICMOS Photometry. ... ST-ECF Grism Spectrum Software for NICMOS Grism Data . ... Analysis . ... STScI NICMOS Software . ...

... During the analysis of the surveys carried out on RATAN-600, it was found that almost one fifth of the detected sources shows significant radio flux variations. ... We used the data from "Cold" radio surveys carried out with RATAN-600 in 1980-1994 to search for radio sources with significant flux variability. ... On possibility of detection of variable sources using the data of Cold surveys carried out on RATAN-600. ... Detection of Variable Sources Using the Data of "Cold" Surveys. ...

AO Home AO Astronomy Schedule Receivers CIMA AO IDL . IDL is the recommended data-reduction package for Arecibo spectral-line data. The different back-ends produce different data format. ... Mock spectrometer standard FITS format headers . Mock spectrometer PSRFITS format headers . WAPP CIMAFITS format headers . Interim Correlator IDL headers . ... Search WAPP data . ... How to fix WAPP FITS files taken with doppler tracking in order to read them with standard FITS readers . ...

A statistical method for the evaluation of the probable amount of interlopers included in the most recently identified asteroid families is developed. ... An application to the most important families listed by Zappal\`a \etal\ {\bf [1995, Icarus in press]} allows to derive the probable amount of interlopers at different size ranges. ... The procedure developed in this paper allows to assess ``how many'' interlopers are probably included in the nominal member lists, but not ``which ones''. ...

Please enter the lightcurve file name and period search parameters: . Lightcurve file: . ... Apply the Heliocentric correction and convert all dates to Terrestrial Time (TT)? ... Also, the Heliocentric correction cannot be applied to such lightcurves. ... This period search service is also available at the mirror sites: Mirror 1 , Mirror 2 , Mirror 3 , Mirror 4 . You may download the latest source code distribution and install the period search service at your own web server. ...

... Colours of stars and galaxies hold information on intrinsic and extrinsic parameters, such as stellar temperatures and galaxy populations, selective absorption and colour changes due different dust contents and inclination angles of galaxies, as well as galaxy redshifts and evolution. ... The colour magnitude diagram of 65000 galaxies to which all above-mentioned quantities and others contribute can only be explained by comparison with simulations. ... Colours are also of technical help. ...

... 2014 June 9 . How to Identify that Light in the Sky . ... If so, and if you live near a city, the answer is typically an airplane, since planes are so numerous and so few stars and satellites are bright enough to be seen over the din of artificial city lights . If not, and if you live far from a city, that bright light is likely a planet such as Venus or Mars -- the former of which is constrained to appear near the horizon just before dawn or after dusk. ... Poll: Is APOD a Blog? ...

... Part B: Theory of Wavelet Transform . ... Part G: Using the Wavelet for analysis of internal Structure of the astrophysical objects + N-Dimensions . ... Comment: Parts of light curves of variable white dwarfs ate investigated by means of a wavelet analysis. ... Comment: The quasi-periodic nature of chromospheric activity variations is not completely compatible with the standard Fourier analysis, so a wavelet analysis is applied to study the nature of regularities in the data. ... 1992) . ...

The AstroGuide . ... AstroGuide | ... AstroGuide Listing . ... See many more Astronomy Listings by: Category or Alphabet . ... The software run under Windows 95, 98 NT, including Paraxial and Seidel . ... and Energy Distribution, Optical Layout, Optimization, Tolerancing etc. ... Listed Since August 20, 2005 . ... Web Site . ... Web . ... Unless otherwise specified, web site content Copyright 1994-2016 John Huggins All Rights Reserved . dbHTML," "AstroGuide," "ASTRONOMY.NET" & "VA.NET" . ...

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HI source finding: 2 novel approaches ATNF, December 2010 Outline · Background · What is source finding? ... Motivation for developing new HI source finding methods · Novel source finding methods · · · · General idea Iterative 3-D median smoothing Characterised noise method Wavelet method · Summary Background What is source finding? ... 3-D median smoothing: Purpose · Goal: Reduce noise while preserving shape · Particularly edges · Median works because it's non-linear · Consider this, Iter. ...

X-RAY BURSTS OBSERVED WITH JEM-X S. Brandt, J. Chenevez, N. Lund, C. Budtz-JЬrgensen, N.J. Westergaard Danish National Space Center, Juliane Mariesvej 30, DK-2100 Copenhagen, Denmark, E-mail: sb@spacecenter.dk ABSTRACT We report on the search for X-ray bursts in the JEM-X X-ray monitor on INTEGRAL during the first two years of operations. ... DATA ANALYSIS More than 350 type I X-ray bursts were found. ... One source, IGR J17254-3257, previously not known to be an X-ray burster, was found [6]. ... Fig. ...

The longterm orbit evolution and ballistic lifetime 1995 - 2000 . The annual distribution of the key magnetospheric regions covered by the orbit in 1995 - 2000 . ... As a result of this evolution the Tail probe will stop his ballistic life in the middle October 2000. ... Back to the Top . ... Back to the INTERBALL Home Page . Back to the IKI Satellite Situation Center (SSC) Home Page . Back to the Space Research Institute (IKI) Home Page . ... Satellite Situation Center, Senior Scientist . ...