... VOLUME**, **PUBLICATION YEAR** **EDITORS** Time-resolved spectral analysis of the pulsating helium star V652 Her C.S. Je ery, V.M.Woolf Armagh Observatory, College Hill, Armagh BT61 9DG, N. Ireland D.L.Pollacco School of Physical Sciences, Queen's University Belfast, Belfast BT7 9NN, N. Ireland Abstract. We present a summary of a new time-dependent spectro- scopic analysis of the pulsating helium star V652 Her. ... The rst direct evidence of a supersonic shock at minimum radius is also obtained. ...

... Previous: Background Fluctuation Analysis from the Multiscale Entropy . ... A new measure of information is defined which is based on noise modeling and incorporates resolution scale. Properties of this measure are discussed. ... Additionally it allows for image noise modeling, and subsequent noise removal. ... Hence information- and entropy-based processing technologies will be necessary for the effective design and implementation of large, future generation, image databases. ...

... 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 . ...

... The data-reduction path given in Chris Salter's IDL Cheat Sheet invovles a number of steps that are repeated for each observation. Onoffred is a wrapper program for the various AO IDL routines that are called, enabling an experienced observer to do file-loading, on-off data reduction, baseline fitting, smoothing and polarization averaging in a single step. ... The robust and user-defined profile windows can be hidden from the postscript output using the /hidelines switch. ...

... Aloisi, A. The Old Stellar Population . Alonso-Herrero, A. HST /NICMOS Observations of the . ... Balcells, M. HST-NICMOS Observations of Galactic . ... Baum, S.A. Investigating the Evolution of . ... Becklin, E.E. A Coronagraphic Search for . ... Clampin, M. The Old Stellar Population . ... Close, L. HST NICMOS Observations of . ... The Stellar Population in . Geballe, T.R. HST NICMOS Observations of . ... Greggio, L. The Old Stellar Population . ... Leitherer, C. The Old Stellar Population . ...

Next: Results Up: High Resolution Measurements from Previous: Introduction . The first step in PSA is to Fourier transform the image and calculate the square modulus of the FT to generate the power spectrum, . ... Specifically, one excludes the very lowest frequencies where the large scale nonuniformities in the image have the greatest effect, and one limits the fit to a frequency range where the SNR is sufficiently high. ...

... The remote planet Pluto and its moon Charon orbit the Sun at a mean distance of almost 6,000 million kilometres, or nearly fourty times farther out than the Earth. During a recent investigation by an international group of astronomers [1], the best picture ever of Pluto and Charon [2] was secured with the European Space Agency's Faint Object Camera at the Hubble Space Telescope (HST). ... The new HST image was taken when Charon was near its maximum elongation from Pluto (0.9 arcseconds). ...

Next: Rotation Periods of ZAMS stars Previous: T Tauri Stars . ... The first attempts to directly measure periodic modulation of T Tauri stars occurred in the early 1980s. Rydgren & Vrba (1983) observed four PMS stars using photoelectric photometry over a period of seven consecutive photometric nights. ... Because the spot lifetime is much longer than the rotational period, the observed effect will be a modulation of the light from the star synchronously with the rotation period. ...

... The Science Operation Department is composed of Astronomers, Telescope Instruments Operators(TIOs) and Data Handling Administrators(DHAs). ... Astronomers have proposed several methods to quantitatively measure the amount of turbulence above the telescope, which the most common ones is Differential Image Motion Monitor (DIMM). In optical testing, the Hartmann test is the common method to test the quality of optical components. ... Hartmann mask consists of 48 lenses. ...

... The motivation for this task is to create one high resolution response matrix for a set of observations without the need for creating individual high resolution matrices. ... This task creates a single response matrix file using information from a list of spectrum from multiple observations, and can also combine spectra and background spectra of the same instrument and spectral order to produce final files that can be used for futher, quantitative analysis in a fitting package such as Xspec. ...

The close position of main satellite and subsatellite (distance between them about 1000 km) and using the similar sets of Faraday cups (VDP and VDP-S) with high resolution measurements (up to 16 Hz for the main satellite and up to 10 Hz for the subsatellite) allow us to determine the small-scale variations of the magnetopause shape and position and to estimate the velocity of the magnetopause motion. ... Two point observation of the magnetopause motion: the INTERBALL project. ...

Static Fourier spectrometers are often used for spectral measurements of the ionosphere emissions. There are two main advantages of Fourier spectrometers (FS) - large geometric factor and high spectral resolution; these parameters are two orders better than for grating spectral instruments. ... In scanning Fourier spectrometer optical and electric modulation of signal is used to avoid this problem, for static Fourier spectrometer there are no such ways. ...

Solar Activity at High Resolution . ... Solar Group . ... Researchers in Arcetri are involved in studies of solar activity at high temporal and spatial resolution, especially at photospheric and chromospheric levels. Our principal aim is to study the temporal correlation between the flares at coronal levels (e.g. hard X-rays emission) and the lower atmospheric signatures, mainly during the preflare and the impulsive phase. ...

Magda Arnaboldi (MSSSO), Tom Oosterloo (ATNF), Francoise Combes (DEMIRM), . ... New, high resolution observations of the H I emission line and 20-cm continuum at the Australia Telescope Compact Array (ATCA) for the prototype polar ring galaxy NGC 4650A are presented. ... Keywords. galaxies: individual (NGC 4650A) - galaxies: dynamics - galaxies: dark matter. related paper: Combes Arnaboldi 1996, A 305, 763, . The dark halo of polar-ring galaxy NGC 4650a: flattened towards the polar ring ?'' . ...

Publications Graca Rocha ё 1 Refereed Publications 1. ... II: Analysis and cosmological interpretation', Hancock, S., Lasenby, A.N., Gutierrez, C.M., Davies, R.D., Rocha, G., Watson, R.A., & Rebolo, R., MNRAS, 1997, vol 289, pp 505-514. ... Constraints on cosmological parameters from recent measurements of CMB anisotropy', Hancock, S., Rocha, G., Lasenby, A.N. & Gutierrez, C.M., MNRAS, 1998, vol 294L, pp 1. ... VSL theories and the Doppler peak', P.P. Avelino, C.J.A.P. Martins & G. Rocha, Phys. Lett. ...

The Sun 11 Solar radio bursts study with high spatial and temporal resolution V.A. Alexeev, A.F. Dementyev, B.N. Lipatov, V.F. Melnikov, M.B. Nechaeva, S.D. Snegirev, Yu.V. Tikhomirov Radiophysical Research Institute NIRFI, Nizhny-Novgorod, Russia Theoretical and experimental researches of the energy release fragmentation in solar ares need observations with high spatial 0.01 1 arcsec and temporal 1 ms resolution. ... Several VLBI stations all over the Russia were supplied by this set of equipment. ...

... The study of the Large-scale structure of the Universe and measurements of the Dark Energy equation of state; The exploration of the growth and cosmological evolution of supermassive Black holes in the Universe. ... In course of the all sky survey SRG will discover about 100 000 galaxy clusters and 3 million AGNs. Galaxy clusters are the largest gravitationally bounded objects in the Universe and are best explored through the study of X-ray emission from the hot intergalactic gas. ... 2016 IKI RAN ...

... Telescopes . ... 1996: . According to the interferometric observations at 6-m telescope with the panoramic infrared detector NICMOS-3, for the first time in the world the angular diameters of the mirid stars R Cas and R Leo were measured at the wavelengths between 1045nm and 2170nm. ... A study of fluctuations of the galactic gas emission at high latitudes within the "Cold" survey band with high sensitivity was made with the RATAN-600 radio telescope. ... Archive . ...

The spectrophotometrical complex of the 6-m telescope in Nasmyth-1 focus . ... A new sample of 360 blue compact galaxies with a strong star formation was build on the base of the Second Byurakan Survey. ... More that 20 galaxies with the extremely low-abundances of heavy elements in the range of 1/30-1/10 of the Sun's one, were found. ... During the 15-years observation term near 500 spectra of the unique source SS~433, from which the relativistic jets were found for the first time, were obtained. ...

Peremennye Zvezdy ( Variable Stars ) 32 , No. ... We report on a new episode of decretion disk formation in the IGR J06074+2205 system. ... From a study of three HeI lines, the rotational velocity of the star was determined as km/s. After five years of spectroscopic monitoring of IGR J06074+2205 (Reig et al. 2010), a reversion from emission to absorption of the H line and hence disappearance of the equatorial disk was reported. ... Reig P., 2011, Astrophys.& ...