... 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. ...

... Meta Index / Home Page / Description The task possesses a diagnostic mode (see parameter diagnosticmode ) which facilitates a more detailed analysis of the individual HK parameter validity intervals. In this mode, in addition to the global GTI, each individual HK parameter selection expression is used to construct a corresponding GTI table which contributes to the global one. All GTI tables will be generated in a single data set named via the gtiset task parameter. ...

... The improvement will be more pronounced in our crowded Wide Field Camera (WFC) images, and may be increased further through use of a more sophisticated method of combining the individual dithered images. Our analysis allows us to check for point spread function shape variations in the HST Planetary Camera (PC) field. ... In crowded field images, we are deriving information about the faint end of the luminosity function (LF) from the texture of the image background. ...

... Credit Copyright: BICEP2 Collaboration , NSF , Steffen Richter (Harvard) Explanation: Did the universe undergo an early epoch of extremely rapid expansion? ... Yesterday, results were released showing an expected signal of unexpected strength, bolstering a prediction of inflation that specific patterns of polarization should exist in cosmic microwave background radiation -- light emitted 13.8 billion years ago as the universe first became transparent . ... NASA Official: Jay Norris. ...

... The axial support is provided by 78 air pistons. ... The transverse support is provided by 38 air pistons, supported by cantilevers from the mirror cell, that act on the mirror local center of gravity surface. ... The locations where the transverse mirror support forces should be applied to the mirror are listed in Table 1 and illustrated in Figure 1. ... Figure 1: CAD drawing showing the 2.5-m primary mirror and the locations of the transverse support posts (black) and axial pneumatic pistons (blue...

Next: Auxiliary utilities Up: MIDAS utilities for Previous: Time series analysis . The commands COVAR/TSA serves for the calculation of the covariance and autocovariance functions. ... COVAR/TSA -- . ... Edelson and Krolik's (1988) method is used for the estimation of the cross correlation function (CCF) of unevenly sampled series. ... DELAY/TSA -- . delay analysis with interpolation: The command computes the time lag function for two time series by the Press et al. (1992) method. ...

... User Guide ] Task: uvflag Purpose: Flags or unflags uv data Categories: calibration, uv analysis UVFLAG is used to change flags corresponding to visibility data. Using the keywords select, line and edge one selects a portion of a uv-data file. ... Key: vis Standard keyword vis. ... Key: edge This keyword allows uvflag to work on the edges of spectral windows. ... Key: options One or more of 'noapply', 'none', 'brief', 'indicative', 'full', 'noquery', 'hms', 'decimal'. ...

... HD144941 is a B type hydrogen-deficient star. ... However, its H/He ratio puts it between the classifications of an extreme and an intermediate helium star, and its low C and N abundances make it unique amongst known H-deficient stars. ... Keywords. stars: helium stars -- stars: individual stars (HD144941) -- stars: atmospheres -- stars: abundances -- stars: oscillations -- stars: evolution . ... The iron abundance in the helium star HD144941 has been measured from ultraviolet Fe III lines. ...

Next: Phase Dispersion Minimization Up: Period Analysis Previous: Period Analysis . Period determination for short period stars is performed by observing target fields several times per night for several consecutive, or closely spaced, nights. ... First the individual frames are debiased and flat--fielded, then fluxes within a four arcsecond aperture around each star (targets and randomly chosen background stars) are extracted. ... Phase Dispersion Minimization . ...

... Figure 1a illustrates the summary diagram (2 log L, log S ) based on the field intensity contour lines for 7 active regions plotted at 200 G steps in the range of 2200­400 G. One can see that the relationship under discussion is well represented by two straight lines, one corresponding to the log S range from 2 to 7.2 and another, from 7.2 to 9. ... Then, we plotted 2 log L versus log S for all field lines of a given intensity, no matter which sunspot or sunspot group they belonged to. ...

... Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. 2014 March 18 . Cosmic Microwave Map Swirls Indicate Inflation . ... Explanation: Did the universe undergo an early epoch of extremely rapid expansion? ... Note how the black polarization vectors appear to swirl around the colored temperature peaks on the inset microwave sky map . ... About APOD | ...

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. ...

In this chapter we will consider two very simple but useful Web agents that I have written on Actor Prolog for my own needs. ... Let us start the Web agent. Fig. ... Start of the Web agent. The Context diagram consists of three blocks: "Logic Programming Sites", "Edit", and "Check". ... Some Web sites that are linked with the logic programming and Prolog are listed in the pulldown list (these addresses are transferred to the "Edit" block from the "Logic Programming Sites" block). ...

... Values have been scaled arbitrarily. High ratios are shown in blue, corresponding to blue colors, and low ratios are shown in red, corresponding to red colors. ... Noise combined with background subtraction difficulties in the lower left quadrant of the WISP1 data (see Fig. \ref{Fig:wisp_snr_mskd}) make colors in this area very unreliable. ... The values shown here are typically a factor of ~3 less than those calculated for the Schmidt data, shown in Figure \ref{Fig:bj_alpha}. ...

... Microlocal Analysis is a theory of Pseudo-Differential Operators and Fourier Integral Operators (PDOs and FIOs). ... Microlocal analysis comes in few flavors. ... We will consider semi-classical PDOs and FIOs: one can always get from there to standard PDOs and FIOs but semi-classical theory has more applications. Less formal description of (semi-classical) microlocal analysis is ``a semi-classical limit of quantum mechanics'' or ``high-frequency limit of electrodynamics'' (etc). ...

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. ...

A 215 to 265 GHz spectral line survey of the Sgr B2 molecular cloud By A l b e r t Numme l i n e­mail: albert@bele.oso.chalmers.se Onsala Space Observatory, S­439 92 Onsala, SWEDEN The spectrum of the Sgr B2 molecular cloud has been surveyed between 215 and 265 GHz towards 3 positions, the dense cores Sgr B2(N)and Sgr B2(M), and the quiescent core Sgr B2(NW). ... 1993)). ... 1991)). ... Albert Nummelin: Spectral line survey of the Sgr B2 molecular cloud 3 Lis D.C., Goldsmith P.F., 1991, ApJ, 369, 157. ...

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 . ...

... Science Users Information Future Facilities and Development E-ELT jump to navigation jump to content . ... Observing with ESO Telescopes . ... In December 2012 ESO Council fully approved the E-ELT Programme ( more , more , even more , still more ). ... In December 2014 ESO Council approved the construction of the E-ELT in two phases, and authorised spending on Phase 1 . ... 15 Jan 2012] Announcement of the E-ELT Workshop "Shaping E-ELT Science and Instrumentation" , 25 February 01 March 2013 . ...

... OXIDIZED AND HYDRATED SILICATES ON M- AND S- ASTEROIDS: SPECTRAL INDICATIONS. ... In particular, it was shown that a considerable fraction (ab. 35%) of the mainbelt M-type asteroids have absorption bands at 3 µm [3, 6] diagnostic of water of hydration. At the same time it was found that the visible-range reflectance spectra of some M- and Sasteroids include absorption features characterizing presence of oxidized silicates [4, 5]. ... The reflectance spectra of 161 Athor (Fig. 1), 497 Iva (Fig. ...