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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• The Behavior of the Aromatic Features in M101 H II Regions: Evidence for Dust
• Mid-infrared spectroscopy of the Andromeda galaxy
• Terrestrial Silicates Compared to Astronomical Silicates

... Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. 2009 October 28 . JKCS041: The Farthest Galaxy Cluster Yet Measured . Credit: X-ray: NASA , CXC , INAF , S. Andreon et al. ... The hot X-ray gas that confirmed the apparent galaxy grouping as a true cluster of galaxies is shown above in diffuse blue, superposed on an optical image showing many foreground stars. ... About APOD | ...

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• APOD: 2016 March 7 - Mystery Feature Now Disappears in Titan Lake
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Next: Radial velocity of the Up: Optical spectrum of IRAS04296 Previous: Observations and spectra reduction . ... However, molecular emission features are only very rarely observed in the optical spectra of PPNe. ... On the other hand, it is well known that cometary nuclei spectra show prominent Swan band emission. In both spectra of IRAS04296 we have discovered strong emission in the (0;0) and (0;1) bands of the Swan system of the molecule. ... Now consider the case of IRAS04296. ...

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• Optimization of spectroscopic observations
• Bus Hound
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... ISO main characteristics, and its data · What is Superspectra project?: ... 2) Provide mean spectra with extremely high S/N ratio for those sources for which there are repeated SWS01 / LWS01 measurements in IDA : (S/N) superspectra (S/N) individual spectrum WHAT IS DONE 1) Inventory SWS01 repeated: - IDA ( iso .esac.esa.int ) - AVO software (www.euro-vo.org) - SIMBAD (simbad.u-strasbg.fr), EXCEL - Sloan's SWS01 catalogue (HPDP from IDA ) RESULTS: - 161 sources (~ 3% total ISO ...

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• http://xmm.vilspa.esa.es/external/xmm_sw_cal/icwg/presentations/HEXTE_cal_ROTHSCHILD.pdf
• Dark features
• Generation from In-Orbit Data

... Laboratory and theoretical modelling of the UV bump on the interstellar extinction curve is a very popular topic in dusty investigations. ... feature is illustrated by Fig. 10 where the profiles were calculated using the model of graphite spheres. Figure 10: Normalized extinction efficiencies for graphite spheres. ... The lower panel shows the summary extinction of two graphite spheres with radii and (from upper panel) taken in equal proportions. ...

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• Silicate minerals
• Database of Optical Properties -- Level: subsubsubpage
• Database of Optical Properties -- Level: subsubpage

... 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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• Practical Astrophysics
• Extragalactic Astronomy
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... European Remote Sensing Satellite (ERS-1) was launched on 17 July 1991, and the follow mission ERS-2 (with the same sensors and an Ozone monitoring instrument added) was launched on 21 April 1995. ... ERS-2 has a fixed repeat cycle of 35 days, and follows ERS-1 tracks with one day's delay. ... Swath width is 102.5 km (telemetered), spatial resolution is about 25x25 m. The Advanced SAR (ASAR) instrument is carried by ESA's ENVISAT satellite launched on 1 March 2002. ... Swath . ... Spatial Resolution...

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Introduction to Imaging Mark Wieringa - ATNF Fourier Basics Image plane and uv-plane Imaging decisions Image estimation Image errors 12/5/2003 Synthesis Imaging Workshop 1 Fourier Basics f(x) Large f(ax Real F(s) Small F(s/a) Hermitian (F(s)=F(-s)*) g ) Multiply f Shift f(x+a) Add f+g Rotate Convolve F*G Phase Gradient Add(F+G) Rotate 12/5/2003 Synthesis Imaging Workshop 2 Image Plane and UV plane 12/5/2003 Synthesis Imaging Workshop 3 UV plane features ! ...

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On combined processing of different space geodetic observations . ... A software for combined processing of different space geodetic observations is developed along with the work on the co-location of various observational techniques at the observatories of Quasar VLBI network. ... Various aspects of the combined processing of different types of space geodetic observations are also discussed. ... space geodetic observations, combined processing, normal equations, software package, SINEX-format. ...

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• Keywords_75
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Optical observations of comet P/Tempel 1 Heike Rauer, JЖrg Knollenberg, Michael Weiler DLR, Institut fЭr Planetenforschung Berlin-Adlershof Observations of comet P/Tempel 1 at optical wavelengths Before and after impact : monitoring · Gas production rates -,,classical optical long- slit spectroscopy: CN, C3, C2, NH2 - variation along heliocentric distance : difference before ­ after? - compare with measurements of parent species at radio, IR · ...

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• http://www.eso.org/projects/www.eso.org.projects.ngc/General/16072008-lmehrgan.pdf
• Interferometric observations: Fringes from two stars of different angular size
• VLTI Calibrator Selection Help Page

... We have developed an integrated system that performs astronomical observations in Near Infrared bands operating two-dimensional instruments at the Italian National Infrared Facility's ARNICA and LONGSP . ... The user interface is organized as widget-based X11 client. ... 1993; Di Giacomo et al. 1993). ... Moreover, if the interprocess communication interface includes support for networking, the software immediately becomes network distributed software. ... DESQview/X User Guide 1993, Quarterdeck . ...

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• Prototypical Operations Support Tools for NASA Interferometer Missions:
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I-GALFA View of a Galactic Tangent Region . ... Image featured in NAIC Newsletter #46 . I-GALFA image of hydrogen gas in a tangent region outside the Sagittarius arm. ... Because we are viewing this gas in a direction closely aligned with (tangent to) its orbital motion, it appears to be moving away from us (we are orbiting the Galactic center with a similar speed, but our own motion in a different direction). ... The gas near 60 degrees longitude is being viewed tangent to its orbital motion. ...

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• Visitors Tourists -- The AO Optical Laboratory
• The AO Optical Laboratories National Astronomy and Ionosphere Center (Arecibo
• Procedures for quick reduction of on-off observations and measuring line

... We had the opportunity to take part in a work experience project in the Armagh Observatory in 2015 from March 30th to April 2nd, during which we used the Las Cumbres Observatory Global Telescope Network to obtain images of various celestial bodies including the Galaxies M83, M88 and M99 which we combined 3 different images created using different filters using the software DS9. ... Images obtained using the Faulkes Telescope North at Haleakala, operated by Las Cumbres Observatory. ...

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• ULTRACAM Observations of Subdwarf B Stars
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. Next: Support Up: How to use Previous: New Users . љ MIDAS is used at many different sites on a large variety of configurations. The main part of this manual does not refer to special configurations or hardware devices. Site specific implementations and details of the local installation can be found in Appendix C of Volume A. Pascal Ballester . Tue Mar 28 16:52:29 MET DST 1995

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• Getting the observations
• Sky problems
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... 2000 September 28 . Heating Coronal Loops . ... LMSAL ), TRACE , NASA . Explanation: Extending above the photosphere or visible surface of the Sun , the faint, tenuous solar corona can't be easily seen from Earth, but it is measured to be hundreds of times hotter than the photosphere itself. ... Astronomers have long sought the source of the corona's heat in magnetic fields which loft monstrous loops of solar plasma above the photosphere. ... About APOD | ... NASA Technical Rep.: ...

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• New Features in this Release
• APOD: August 6, 1998 - Infrared Horsehead
• APOD: 2000 June 13 - The Keyhole Nebula in Infrared

Astronotes Armagh Planetarium's Stellar Blog! ... Armagh Planetarium . ... Stars . ... Space Flight . ... Monthly Sky Notes . ... NGC 6357's inner star forming region glows with the emission of ionized hydrogen gas. Image credit: ESO/VVV Survey/D. Minniti. ... Located around 8000 light years away in the constellation of Scorpius , NGC 6357 (sometimes called the Lobster Nebula ) is a typical stellar nursery, filled with vast clouds of gas and tendrils of dark dust. ... Subscribe to Astronotes . ...

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... Astrophysics Group . ... COAST . Fringes and Power Spectra from COAST . ... After acquiring a star, measurements must be made of the (complex) fringe visibility on each baseline. ... Fortunately, even in the presence of very strong atmospheric turbulence there is a good observable: the phase of the triple product of the visibilities on three baselines, commonly known as the closure phase. ... We then form the power spectrum of the resultant data, and hence estimate the visibility. ...

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• OptInt PmWiki : PmWiki / Wiki Trails
• G349.7+0.2
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... Tonight's Sky . ... News . Observing . ... Astronomy for Kids . ... Tune into the Asteroid Day press conference . ... A new method to measure asteroids . ... A new method to measure the size and shape of asteroids that are too small or too far away for traditional techniques increases the number of measurable asteroids by a factor of several hundred. ... Having proven the validity of their new and powerful technique, the team can now start a large observing campaign to study small asteroids. ...

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... Archives . ... I?ve copied below the text of an ISBA announcement for the first workshop in a new series addressing Bayesian methods for machine learning. It builds on the model of the earlier well-known ?Bayesian case studies? workshops, where just a few applications are featured at each workshop, with the format tailored to produce a lot of back-and-forth between application scientists and statisticians. ... Workshop on Case Studies in Bayesian Statistics and Machine Learning . ...

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• The AstroStat Slog Blog Archive loess and lowess and locfit, oh my
• Spectroscopic Data
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... Millions of Stars in Omega Centauri . ... In an unexpected twist, recent observations have shown that the gas in the outer regions of this photogenic spiral is rotating in the opposite direction from all of the stars! ... Space Shuttle and Space Station Photographed Together . ... Usually, pictures of the shuttle, taken from space, are snapped from the space station. Commonly, pictures of the space station are snapped from the shuttle. ... A Last Landing for Space Shuttle Endeavour . ...

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