In early mid-infrared observations (c 1970) two prominent dust emission features were discovered. ... Soon after the discovery of the silicate features another feature at about 11.3 microns was discovered in the spectra of some carbon stars, not as wide or as strong as the silicate features but still thought to be due to a solid material. ... less common features: extreme carbon stars, the AlO/silicate complex, the "unidentified infrared" features, unusual silicate features . ...

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• Fine Guidance Sensor Instrument Handbook
• Discovery and Analysis of 21 ѕ®m Feature Sources in the Magellanic Clouds
• Images of Thermal Dust Emission in PNs

... Programme . ... Abstract: -ray signatures of hadronic acceleration in Centaurus A are investigated. Using two different models for the generation of ultra-high energy cosmic rays (UHECR) in active galactic nuclei and normalizing the UHECR flux of Centaurus A to the observations of the Pierre Auger Observatory, we calculate the accompanying high energy -ray flux in the GeV to TeV range. ... CSIRO 2009 Legal Notice / Privacy Statement Last modified: 15/11/2010 ...

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• Radio Observations of Jupiter
• VLATYPE
• Australia Telescope National Facility

GJ 205 Other Names HD 36395 / Wolf 1453 (RA, Dec) 2000 (05:31:24.85, ­03:38:53.4) (l II b II ) (206.93, ­19.45) Spectral Type dM1.5 Distance 5.7 pc m V 7 m :98 B \Gamma V 1.5 [m=H] 0.5 ROSAT/PSPC 0.19 cts s \Gamma1 EUVE /DS 0.02 cts s \Gamma1 EUVE Observation Jan/Feb 1997 [394.1 ks] GJ 411 Other Names HD 95735 / SAO 62377 (RA, Dec) 2000 (11:03:22.58, +36:02:09.6) (l II b II ... The line strengths were computed using a solar­type Active Region DEM and a Quiet Sun DEM (Brosius et al. ...

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• The AstroStat Slog Blog Archive my first AAS. VI. Normalization

... 172 ] Briefly, the count rate at the detector from a source at a redshift z is . ... Figure 55 shows the ``Green functions'' for the double compact binary merging rate   evolution assuming no collapse anisotropy. ... Another way that diverse peculiarities in the - distribution induced by the sources evolution could arise is connected with a possible non-monotonic character of the star formation rate in galaxies. ... 22 ] Figure  56 shows two-dimensional cuts through the parameter space. ...

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• Initial Distributions of Binary Parameters
• The Radiopulsar PSRB1259-63 - a Probe in the Stellar Wind Plasma
• Supernova Explosions

Visual Discovery of SN 1996X in NGC 5061. ... It was not until the IAU Circular was issued that we found out there had been an independent amateur photographic discovery of this supernova by Kesao Takamizawa of Japan. ... Earlier in the week, 660 galaxies had been observed during two nights we had use of the 40 inch telescope at Siding Spring. ... The supernova in NGC 5061 was first seen with the smaller telescope about 10pm local time on Friday, April 12 (April 12.5 UT). ...

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• APOD: 2001 May 1 - Antarctica Hears Little Normal Matter in the Big Bang
• APOD: 2002 August 20 - The Universe in Hot Gas
• APOD: 2005 August 8 - Mars to Appear Normal this August

Plans are under way to create a new way of performing non-interactive observations which will be called auto-observing . ... Non-interactive observing with CIMA has for a long time been available with the use of CIMA command files. Contrary to normal command file observing which requires a command file with a set of commands to be executed sequentially, auto-observing will use a list of sources and a list of instructions on how to observe each of the sources. ...

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• CIMA Frequently Asked Questions
• CIMA Version 2.2 Preferences
• AGES - the Arecibo Galaxy Environment Survey

... SFIT is a general-purpose code designed to optimize theoretical stellar spectra to an observed spectrum. ... While the programme expects input from "stdio", it is more natural to save commands in a file (eg "sfit_input") and run the code simply by . ... If the spectra to be fitted have a filename "star_spectrum", then the best fit spectrum will be written out, together with the renormalized input spectrum, to a file called "star_spectrum.fit". ... sets up model spectrum grid (and for 2nd star) . ...

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• Armagh Observatory
• Observations and Data Reduction
• Armagh Astronomers to observe Ringing Star with Global Telescope

These observations are aimed at fully charactering FORS1 photometric system (UBVRI zero-points, color-terms and extinction coefficients) for the Tektronix 2048x2048 pixel CCD (24µm px) . To this aim, the two Landolt/Stetson photometric fields SA95 and SA101 will be observed on a number of epochs and at different airmasses during February and March 2007. ... SA101 . ... OBs for SA101 have to be observed during evenigh twilight (exceptions are expected for the second half of March) . ...

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• ESO - cosmology2002
• ESO - ESO sky correction tools
• Visiting with an Old and Active Friend (ESO PR Photos 07a-b/01)

Next: Feature enhancement: local Up: No Title Previous: Feature enhancement: filtering . ... As a result, a common magnitude scale (contour lines on the maps above, or color scale on Fig.1) will poorly display the short-duration events in a signal. Normalizing each line of the map (fixed duration) so it has unit variance (in effect dividing the energy map by the mean energy spectrum) at each duration restores more details of small-scale activity (Fig. ...

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• Feature enhancement: filtering and denoising
• Feature enhancement: local maxima

... The technique is based on the iterative subtraction of continuum estimates and eigenvector sky models derived from singular value decompositions of sky spectra and sky spectra residuals. ... The spectra may also be redshifted to a common radial velocity, though this feature isn't used for sky subtraction. svdvec is a Fortran program, called by IRAF as a foreign task, which decomposes an array of spectra, such as that created by svdprep , into eigenvectors using Singular Value Decomposition. ...

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• An Approach for Obtaining Polarization Information from COBE-DMR
• Modern CCD Observations of Moving Celestial Objects: Algorithms and Software
• Data Reduction Software for SWAS

... Tonight's Sky . ... Sky this Month . ... milky way . ... The Sky This Week: April 1 - 10 . ... Sky this Week . ... Astronomy for Kids . ... Sky Events . Get to Know the Night Sky . ... Is there any way photons could contribute to the mysterious dark matter? ... Get instant access to subscriber content on Astronomy.com! ... If you are already registered on Astronomy.com, please log in below. ... Receive news, sky-event information, observing tips, and more from Astronomy's weekly email newsletter. ...

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• If neutron stars don't produce energy from fusion, like normal stars, how can
• Magnetic fields, subatomic particles, etc., traveling in different directions
• NASA's New Horizons to return to normal science operations after spacecraft

... Other Characteristics of the Sun: Variability of Rotation, Magnetism, Chemical Structure, Planetary System. ... Methods of Solar Magnetic Fields Measuring: Visual, Photografic, Photoelectric. ... Empiric Datas of Magnetic Fields in Photosphere, Chromosphere and Corona. ... Characteristics of Magnetic Field in Balanced Force Tubes by Potential and Forceless Field. ... Phenomenons in Active Region (Magnetic Field, Spots, Torches, Solar Prominences, Flares, Discharges. ... Magnetic Fields in Flares. ...

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• Internal Structure of Stars
• Physics of Heliosphere
• Practical Astrophysics

... We have investigated the magnetic fields of several Herbig Ae/Be stars separately for the stellar and circumstellar (CS) field comp onents. ... We have established that at high state of this activity all p olarization indications of magnetic field relate mainly to the CS media. ... 2005). ... We found that p olarization signatures of the CS magnetic field in Balmer lines in the sp ectra of the Herbig Ae/Be stars are mainly observed in deep absorption comp onents formed in the stellar wind. ...

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• Emission molecular bands
• Fabry-Perot Interferometer: Gallery Old
• di_eks

... We have observed and studied critical supercurrents, Ic, in cross-type Nb-Cu/Ni-Nb junctions with Josephson layers prepared from diluted ferromagnetic alloys. For suitable values of the exchange energy in the ferromagnet and the F-layer thickness we have observed Ic(T) oscillation with vanishing Ic for the definite values of T and dF. ... Critical supercurrents, Ic, in Nb-Cu(1-x)Ni(x)-Nb Josephson SFS junctions with F-layers prepared from ferromagnetic Cu(1-x)Ni(x) alloys have been studied. ...

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• LPCBC: Abstract 2_11
• Department of Solid State Physics MIPT
• Phys. Rev. B 54, 454 (1996): Neminsky et al. - ac susceptibility of Rb

... The first task assumes the searching for chemical composition and sizes of particles which give the wavelength dependence of the extinction efficiencies close to the observed dependence of . Figure 7: Wavelength dependence of the extinction efficiency factors for homogeneous spherical particles of different sizes consisting of astronomical silicate and amorphous carbon. The dashed segment shows the approximate wavelength dependence of the mean galactic extinction curve at optical wavelengths. ...

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• Linear polarization: wavelength dependence
• The 2175? feature
• Silicate minerals

... Assured of a reliable method of solving the normal equations, we now consider the equations of condition. The observed magnitude m of a star at M air masses with true instrumental magnitude is modelled as ([ 10 ], [ 28 ]) . ... The effective extinction coefficient depends on the effective spectral gradient [ 29 ] of the star, for which we use some color index, affected by half the atmospheric reddening ([ 26 ], [ 10 ]): . ... Thus, for the B band of UBV, we use the (U-V) color. ...

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• Normalization and Fitting
• Interpreting the output
• Background Estimates

... Within SAS, a tool is available to check the pile-up fraction in the pn data: epatplot . This tool compares the observed pattern distributions (derived from a pn calibrated and concatenated even list) with the calibrated models. ... The lower panel is the key element for the evaluation of the pile-up fraction: it shows the observed distribution of pattern as a function of energy (PI channel in Analog-Digital Units ), using the same color code. ... Pages maintained by SAS librarian . ...

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• How to extract MOS background spectra from blank fields event lists
• Node-specific Exposure Maps

ESO PR Photo 18b/00 . ... Caption : Images of two of the novae in NGC 1316 that were discovered during the observational programme described in this Press Release. ... In particular, no less than four novae were detected in a single giant galaxy within only 11 days . ... Moreover, the discovery of four novae in one galaxy in the Fornax cluster was possible with only 3 hours of observing time per filter. ... ESO Press Information is available on the WWW at . http://www.eso.org/outreach/press-rel/ . ...

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• The Discovery of the Galilean Satellites
• APOD: January 6, 1998 - The Red Spider Planetary Nebula
• Procedures for Observations

... An ionospheric trough is a region of decreased F layer plasma density. ... It is quite typical to make a distinction between the sub-auroral troughs at mid-latitudes, and high-latitude troughs within the auroral region or polar cap . ... working for mid-latitude trough and some types of high-latitude troughs, like the polar hole . ... Collis, P. N., and I. HДggstrЖm, Plasma convection and auroral precipitation processes associated with the main ionospheric trough at high latitudes, J. atmos. terr. ...

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• TCV [Oulu]
• Space Physics Group of Oulu
• Substorm fine structure [Oulu]

... astro-ph . ... Whitespace-separated words are treated as AND ed. Show 10 50 100 articles per page in Full Compact mode . ... Quasar Variability in the Framework of Poissonian Models . ... It is shown that in this very general framework the well established anti-correlation between variability amplitude and wavelength can only be understood as an effect of an underlying spectral component which remains stable on long time-scales, and is redder than the variable component. ...

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