... The effect of a certain sampling pattern in the frequency analysis is particularly transparent for the power spectrum. ... For and we obtain the result . ... Therefore, if interference between frequencies is small, the power spectrum reduces to the sum of the window functions shifted in frequency: . In the opposite case of strong interference, ghost patterns may arise in the power spectrum due to interference of window function patterns belonging to positive as well as negative frequencies. ...

... There are 6 different analysis options: . 0:all : all the exposures corresponding to the chosen observation are reduced to calibrated event lists, unless disabled via the corresponding parameter ( PN , MOS , RGS , OM , all set to "yes" by default). ... The EPIC data is then searched for source detections, via edetect_chain . By default, for the EPIC data, if more than one exposure is present, these actions are taken over the event list corresponding to the longest observation. ...

... 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. ...

Next: A Preliminary Investigation Up: Spatial Corrections of ROSAT Previous: Introduction . ... These tasks bin a time sorted photon event list based on an assigned phase that corresponds to the 402 second period of the wobble. ... The fundamental limitation of this method is how many source counts you have for centroiding each binned image section. ... Once the phase binned qpoes have been shifted in x,y so as to align the source centroid, they are restacked using 'qpappend_ftsi'. ...

... Previous: Determination of Variable Time Delay in Uneven Data Sets . ... It is shown that the likeness of the periodogram and the LS-spectrum (both estimators of the power spectrum are widely used in the spectral analysis of time series), depends on the properties of the spectral window corresponding to the distribution of time points. ... Present day theory and practice of the spectral analysis of unequally spaced time series are based on two approaches. ...

MyMidiGui is an IDL wrapper for some of the MIA and EWS routines which was originally written to support MIDI data analysis during service mode observations on Paranal. Since the first release ( Version 0.2 ), MyMidiGui has been extensively revised and integrated into the OYSTER environment. This enables easier plotting and analysis of MIDI data with OYSTER after having been reduced using MIA+EWS. The MyMidiGui major version numbers correspond to the compatible versions of MIA+EWS . ...

... PUL VLBI Analysis Center . ... Pulkovo EOP and Reference Systems Analysis Center (PERSAC) is located at the Pulkovo Observatory . ... Processing of VLBI , GPS, and optical observations aimed at analysis of the Earth rotation, station displacement, and celestial reference system. ... Celestial Pole Offset (CPO) and Free Core Nutation (FCN) . Four daily updated CPO and FCN series (models) are provided. ... File fcn1.dat contains the ZM1 FCN model with variable amplitude and phase. ...

... We present the results of our new observations of TYC 0075 01143 1, a recently discovered double-mode Scuti variable. We improved the frequencies and and pulsation amplitudes, detected the interaction frequencies , , and a possible nonradial frequency . ... The finding chart of TYC 0075 01143 1. ... Using our new observations of TYC 0075 01143 1, we improved the frequencies and , detected oscillations corresponding to interaction between and : and ; we also found a possible nonradial frequency . ...

... Maximum data output rate = 6.4 Mbyte/s. Output data files in PSRFITS format. ... spd: sel pp11 - pulsar phase vs amplitude . ... John Sarkissian starts the web-page checklist and writes report providing information on the last observing session and data processing. ... He produces a text file containing the processing commands required: /psr1/jms/processed.txt John Sarkissian copies the raw data files (DFB/WBC) from Lagavulin to Epping. > cd /data/LAGAVULIN_4/pulsar > cd DFB > rsync -av . ... Group ...

Analysis of Observations of Earth Impact Object 2008 TC3 . ... Central (Pulkovo) Astronomical Observatory of RAS, St. Petersburg, Russia Abstract: . On-line astrometric and photometric observations of asteroid 2008 TC3 , discovered 19 hours before its impact on Earth [1], were carried out with the mirror astrograph ZA-320 пњ at Pulkovo observatory at night of 7 th October, 2009. ... Results of analysis of the of 837 observations taken at 26 observatories worldwide are presented. ...

... Radio emission at around 90 GHz from star-forming galaxies is expected to be strongly dominated by the free-free component due to ionising radiation from massive, short-lived, stars. We present high surface-brightness sensitivity observations at 90 GHz of the nearby star-forming galaxy Messier 66 with resolution of about 9 arcsec (corresponding to a physical scale of about 500 pc) and analyse these observations in combination with archival lower frequency radio and mid-infrared measurements. ...

SN 1989B Light Curve Analysis. ... In the light curve depicting their observations, definite trends are noted, here is a "thumb-nail" analysis of the the magnitude estimations of the bright SN (1989B) in the galaxy NGC 3627 (M66). ... The observations were inserted against the V magnitude templete of BL, CCD photometric data, (Wells et. al, (1994) and a color trend (B-V) histogram of the mean type Ia SN (BL)(nutemp.gif). Key Words: Amateur Observations, Supernova, Magnitude Estimates, 1989B . ...

... Field of interest: data analysis and interpretation of X-ray observations of BHC and NS systems, astrophysics of compact objects and related phenomena: X-ray , optical and radio observations , shocks and stellar winds, emission mechanism, the spectral and timing analysis of the X-ray emission from microquasars ( signature of accreting BH), atoll- and Z-sources ( signature of accreting NS), modeling of INTEGRAL images % . ...

. Amplitude spectrum of CI Cam , calculated using Deeming method for the observations in V band. Light curve of CI Cam V band. To draw this light curve, the observations were reduced to uniform system (of the photoelectric data by N.V.Metlova taken with V.M.Lyuty's electrophotometer at the SAI Crimean station), and then the trend of slow variability was eliminated.

... 13, Moscow 119992, Russian Federation, e-mail: busarev@sai.msu.ru; 2 Research Institute Crimean Astrophysical Observatory, p/o Nauchnyi, Crimea 334413, Ukraine, e-mail: prok@crao.crimea.ua Summary: We propose a combined method of astronomical investigations of small or distant planets incorporating registration of a set of integral spectra of an object and their frequency analysis. ... An application of the method is shown on example of asteroid 21 Lutetia. ... 6] Busarev V. V. (2002), Solar Sys. ...

Next: CONCLUSION Up: CHIRPLET TRANSFORM SUBSPACES Previous: Nondilational Chirplet Transform . Suppose we choose a windowed sinusoidal FM signal for our mother chirplet. Such a signal has a frequency that periodically rises and falls (much like the vibrato of musical instruments or the wail of a police siren). ... Figure 14 . ... Using the warbling mother chirplet, we also computed the ``dilation-dilation'' ( ) plane of the chirplet transform (Fig. 16 ) for the pendulum data. ...

SOLAR EVENTS OF OCTOBER–NOVEMBER 2003 . BY IZMIRAN RADIO OBSERVATIONS . I.M. Chertok, V.V. Fomichev, A.A. Gnezdilov, R.V. Gorgutsa, A.K. Markeev, and D.E. Sobolev . ... Digital Radio Spectrograph of IZMIRAN . ... PDF file of the paper "Violent Solar Eruptive Events of October-November 2003 as Recorded by IZMIRAN Radio Observations" , by I.M. Chertok, V.V. Fomichev, A.A. Gnezdilov, R.V. Gorgutsa, A.K. Markeev, and D.E. Sobolev , Astronomical and Astrophysical Transactions, v. 24, No. 1, pp. ...

... R1929 Date Received: 2004-Jan-31 18:34:33 Technical Page Proposal Type: General Category: Observation Category: Total Time Requested: Prop osal Title: ABSTRACT: Regular Planetary Radar Solar System 28 Hours A Radar Search for Regoliths on the Asteroids 11066 Sigurd and 4179 Toutatis We prop ose radar observations of two asteroids that will pass close to Earth, with the goal of using a linear p olarization analysis to search for the presence of regolith material. ... Part of the observing run. ...

... During all period of our investigations Dr. N.Sumzina from the Institute of Applied Astronomy of RAS had prepared the Numbered Minor Planet positions from MPC Database for our processing with kind permission of the Director of Minor Planet Center Prof. Braian Marsden. ... Our extensive processing of the MPC data allows us to conclude that CCD observations of the Numbered and Unnumbered Minor Planets have the errors, sometimes very crude. ...

... Old World First Asteroid Radar Echo. ... It testifies that 4179 Toutatis is a double object like asteroid 4769 Castalia. ... Interference of Radar Echo from the Binary Asteroid 4179 Toutatis. ... An analysis of the 6-cm radar data revealed quasi-harmonic oscillation of the echo’s “central” Doppler frequency with a period of about 14 sec and a deviation of about (0.7*B) Hz, where B is the echo bandwidth, which for 4179 Toutatis was equal to 2.1 Hz and 1.9 Hz for 1992 Dec 8 and 9, respectively. ...