We observed the reflection nebula NGC 7023, with the Short-High module and the long-slit Short-Low and Long-Low modules of the Infrared Spectrograph on the Spitzer Space Telescope. We also present Infrared Array Camera (IRAC) and Multiband Imaging Photometer for Spitzer (MIPS) images of NGC 7023 at 3.6, 4.5, 8.0, and 24 ЮМm. We observe the aromatic emission features (AEFs) at 6.2, 7.7, 8.6, 11.3, and 12.7 ЮМm, plus a wealth of weaker features. ... ADS Citation Query . citations = 112 . ...

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• Discovery and Analysis of 21 ѕ®m Feature Sources in the Magellanic Clouds
• Dusty HII Regions and Planetary Nebulae
• Stars as Observed in the Infrared

View Edit Attributes History Attach Print Search . ... Observing . ... PPTA timeline . ... Editing this wiki . ... RFI . This page is dedicated to identifying the types of RFI that you may encounter whilst observing for P456. ... To upload an image, click 'Edit' at top right, log on, and click 'Attach'. ... Then add a title, description, and the 'Attach' definition and save the page. ... View Edit Attributes History Attach Print Search - Page last modified on February 19, 2014, at 10:59 PM . ...

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• Post-Correlation - Features
• Programme - Abstract
• Australia Telescope National Facility

... 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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• Footnotes
• Wavelength dependence
• Silicate minerals

... Science . ... Data Handling and Products > Data Reduction FAQ > My MR+GG475 data show strong absorption features below 6000A. Where do they come from and how can I correct them? ... Observing with ESO Telescopes . ... Science Data Products Forum . ... The absorption comes from impurities in the GG475 filters and the first and third quadrant are most strongly affected (see plot - the black curve shows the spectrum of a featureless star observed in Q1, the green shows the same star observed in Q3). ...

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• ESO - My data shows an extended, bright feature - what can this be?
• ESO - I see unexpected boxy emission-like features in my REDL spectra - where
• ESO - The response curve leaves residual instrument features in my science.

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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• Fabry-Perot Interferometer: Gallery Old
• Absorption bands identified with DIBs
• Narrow DIBs survey - figure36

... Tonight's Sky . ... The Magazine . News . Observing . ... Magazine . ... Gravitational wave search provides insights into galaxy evolution and mergers . ... The double star 54 Leonis, spiral galaxy NGC 3198, and emission nebula NGC 3199 . ... Open cluster NGC 2818, spiral galaxy NGC 2964, and spiral galaxy NGC 2976 . ... Astronomy for Kids . ... magnetic field . ... Receive news, sky-event information, observing tips, and more from Astronomy's weekly email newsletter. ... Astronomy Magazine . ...

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• How do neutron stars generate steady magnetic fields? | Astronomy.com
• Astronomy Magazine - Interactive Star Charts, Planets, Meteors, Comets,
• Web Extra: Astronomers animate one of the largest galaxy clusters ever observed

... The Sun of our solar system is a typical star of intermediate size and luminosity. ... The Sun has a very complex surface magnetic field created by convective flow of the electrically conducting solar material. ... The escaping hot coronal plasma is called the solar wind . ... See the table below for the observed features above the Sun's surface. ... Chromospheric features . Coronal features . ... dense clouds of material suspended above the surface of the Sun by magnetic field line loops . ...

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• TCV [Oulu]
• Ionospheric troughs [Oulu]
• Auroral arcs [Oulu]

... Armagh Observatory, College Hill, Armagh BT61 9DG, +44 (0)28 3752 2928 . Sequence of four video frames captured at 01:05 BST at Armagh Observatory on the night of the 24/25th July 2013, showing the onset, development and demise of the sprite. ... Unlike common lightning discharges, which often jump between clouds or between the clouds and the ground, sprites are associated with similarly powerful electrical fields that occur high above the clouds of the EarthтАЩs atmosphere. ...

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• Bright Point Studies
• Featured Image | International Year of Astronomy in Ireland | Astronomy 2009
• sfit help file

... From the chain visibility point of view, it is very recommended to look at the Javascript movies , especially if the frame rate can be not regulated in your MPEG player. ... The non-CH-associated large-scale chains visible on the SOHO/EIT images at three wavelengths of 171, 195 and 284 as well as on the MLSO/HAO He I 10830 spectroheliogram of December 16, 1997. ... The SOHO/EIT movies at 171 and 195 show the chain dynamics on June 1-3, 1998. ... Javascript movie (230 KB), SOHO/EIT, 171 . ...

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• SINGULAR POINTS IN THE SOLAR CHROMOSPHERE
• The 14 July 2000 meter-wavelength dynamic radio spectrum

... We carried out follow-up spectroscopy of 178 Case galaxies in the zone - 16 h , and - +38 ,classified in the Case catalog with some code, indicating the presence of the line [O III ] 5007, and not observed in the previous follow-up studies. ... We conclude that Case ELGs give the high fraction of BCGs -- about 60 % of all galaxies with strong enough emission lines, and more than 40 % of all Case galaxies, marked with some code of the presence of [O III ] line. ...

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• Example
• Stellar objects
• Results of follow-up spectroscopy

... gradients dependencies on solar wind parameters and IMF; . ... fate of thermal plasma at the dayside magnetopause. velocity-dispersed injections of the thermal and superthermal ions from LLBL at cusp and cleft (lowest energy VDIS-2 events); . ... outer cusp processes, role of outer cusp indentation, plasma entry (laminar reconnection, turbulent diffusion, others), role of turbulent boundary layer; . how is the magnetosheath plasma heated near magnetopause and cusp? . ... cusp/cleft wave emissions. ...

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• Multipoint correlations of the solar wind parameters observed by several
• A Brief History of Magnetospheric Physics Before the Spaceflight Era
• Events on January 10-11, 1997 - INTERBALL observations

... Contacts . 2012: . ... We refined the fundamental parameters of the components, the orbital periods, and the conditions of photospheric heating of the secondary component by the ultraviolet radiation of the hot component. ... The observations of the star clusters associated with ultra-luminous x-ray sources (ULXs) in four galaxies on the 6-meter and VLT telescopes have shown that all the ULXs are located within 200pc of very young star clusters (younger than 5 million years). ... Archive . ...

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Current projects: . Pre-proposal stage (i.e. Bright Ideas) . Project for observing kinematics in tidal/peturbed features: . Absorption lines through Tidal features of NGC772 . ... Absorption lines through Tidal features of LEO I . ... Absorption lines through HI features of NGC6822 - under re-review . ... Absorption lines through Tidal features of NCG4631 . ... Absorption lines through Tidal features of Leo Triplet, NGC3628 . ... Further Studies of the CO in the Magellanic Bridge. ...

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• http://www.naic.edu/~gibson/galfa/igalfa/docs/poster_2014_aas_hughes_full.pdf
• http://www.naic.edu/vscience/schedule/tpfiles/KangtagA2153tp.pdf
• http://www.naic.edu/~astro/talks/abstracts/deshpande_12aug05.htm

... Up: Data Analysis and Processing Techniques . ... Also, a method for quality control of CCD observations is suggested. ... Everyone who observes a celestial object using a CCD detects moving celestial objects as a ``by product''. ... We hope that our investigations may be useful for near-Earth space control and also for searches of the moving celestial objects through analysis of old and new CCD frames obtained at any amateur or professional astronomical observatory. ...

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• Data Structure and Software of the UCAC-S Project
• SVDFIT: An IRAF Task for Eigenvector Sky Subtraction
• Remote Observing With Java

... Under certain conditions, like those in the nucleus of a QSO, all atoms can be made to emit light at particular wavelengths. ... If that source is approaching the observer, the wave is squashed up onto itself making the wavelength shorter. ... This is redshift. ... You can see how the section of the QSO spectrum which we observe changes with redshift. ... We then see how far we had to slide the observed spectrum along the scale to make it match and that is the objects redshift. ... The 2QZ team . ...

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... 2004 November 14 . Leonids Above Torre de la Guaita . ... Explanation: The 1999 Leonids Meteor Shower came to an impressive crescendo. Observers in Europe observed a sharp peak in the number of meteors visible around 0210 UTC during the early morning hours of November 18. ... Visible are at least five Leonids meteors streaking high above the Torre de la Guaita, an observation tower used during the 12th century in Girona, Spain . ... About APOD | ... NASA Official: Jay Norris. ...

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• APOD: November 23, 1999 - Leonids Above Torre de la Guaita
• APOD: 2000 November 26 - Leonids Above Torre de la Guaita
• APOD: 2011 December 6 - Jupiter Rotation Movie from Pic du Midi

The following activities are included in the Universe at Your Fingertips guide. ... Clicking on each activity will take you to a "reviews" page where you can post a review, or read reviews posted by others who have used the activity. ... Activity Online . ... MOON AND PHASES . ... Observing Phases and Features . ... Modeling Moon Phases . ... SUN AND SEASONS . ... Observing the Sun Safely . ... Observing Where the Sun Sets . ... Making Pictures of Motion . ... Morning Star and Evening Star . ...

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• mini-Workshop on Solar Statistics
• Chandra Images for SNR J0046.6-7307
• Chandra Images for SNR J0047.5-7307

Ground-Based Mid Infra-Red Observations of Nearby Starburst and AGN Galaxies Bo jan Nikolic , Paul Alexander, Garret Cotter and Malcolm Longair Astrophysics Group, Cavendish Lab, Cambridge, U.K. Marcel Clemens Universita degli Studi di Padova, Italy Abstract. We present preliminary results of recent spatially resolved mid infrared (Mid-IR) spectroscopy with the MICHELLE instrument on UKIRT of NGC 7469, observed as part of a larger programme to study a sample of starburst and AGN in the Mid-IR. ...

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• Inference of Coefficients for Use in Phase Correction Bojan Nikolic web pages
• LOFAR MKSP Workshop
• Galaxy Evolution: EVN Deadline

... SN Refsdal: The First Predicted Supernova Image . ... A Dark Earth with a Red Sprite . ... Earth's annual Geminid meteor shower did not disappoint, peaking before dawn on December 14 as our fair planet plowed through dust from active asteroid 3200 Phaethon. ... The Horsehead Nebula . ... Like rainbows that are caused by rain, arcs of sunlight broken up into component colors can also result when ice crystals floating in Earth's atmosphere act together as a gigantic prism. ... December 2015 . ...

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• NanoSail D
• Journal "Peremennye Zvezdy"

home publications > mercury . ... ASP Conference Series . ... Walter Baade: Master Observer . ... The great German-American astronomer Walter Baade not only pioneered supernova research, he doubled the distance scale of the universe and fathered the idea of stellar populations based on age. ... Baade (pronounced BAH-dah) was lucky to be the right man in the right place at the right time, but he was able to seize the situation and make the most of it in a way that none of his contemporaries could. ...

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• ASP: Guest Observer
• ASP: Observer's Delight
• ASP: Attacking Mars