... Armagh Observatory, College Hill, Armagh BT61 9DG, +44 (0)28 3752 2928 . ... The interface between the lower solar atmosphere where energy is generated by subsurface convection and the corona comprises the chromosphere, which is dominated by jet-like, dynamic structures, called mottles when found in quiet regions, fibrils when found in active regions and spicules when observed at the solar limb. ... In addition, how they affect the coronal heating and solar wind need to be further explored. ...

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• Observations with the Faulkes Telescopes
• ULTRACAM Observations of Subdwarf B Stars
• Magnetic Reconnection

... Just as magnetic storms are composed of substorms, the substorms themselves seem to be composed of smaller scale events. ... steplike expansion of the auroral bulge (Vorobjev and Rezenov, 1973; Sergeev and Yahnin, 1979; Murphree and Cogger, 1992; Nakamura et al., 1993) . ... 1990) . ... fine structure in the bursts of bremsstrahlung X-rays (Lazutin et al., ... Nakamura, R., T. Oguti, T. Yamamoto, and S. Kokubun, Equatorward and poleward expansion of the auroras during auroral substorms, J. Geophys. ...

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• Dayside aurora [Oulu]
• FM-3I Instrument
• Magnetic field models[Oulu]

Observations of stellar magnetic fields is a powerful method to study of different non-stationary effects in our Galaxy and behavior of plasma under astrophysical conditions. ... Investigations of stellar magnetism by means of Zeeman measurements of polarized spectra of different stars are one of the most significant observational programme on the 6-m telescope BTA of our Observatory. ... Laboratory for the Stellar Magnetism Study . ... Laboratory for the Stellar Magnetism Study of SAO of the RAS . ...

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• Laboratory for the Stellar Magnetism Study of SAO of the RAS - History of
• Laboratory for the Stellar Magnetism Study of SAO of the RAS - Magnetic stars -
• Optimization of spectroscopic observations

WFPC2 . Images: version1 , version2 . Catalogs: Version 1 HDF-S , HDF-N ;Version 2 HDF-S . STIS . ... NICMOS . Images: Camera 3 , V2 of psf-convolved STIS 50CCD on NICMOS . ... Images: WFPC2 FF , STIS FF ; Version2: WFPC2 FF , STIS FF , NICMOS FF . Catalogs: Version2 WFPC2 FF , STIS FF , NICMOS FF . ... Check the instrument specific technical pages for a description of the data products and the implemented data reduction steps: STIS , WFPC2 , NICMOS , Flanking Fields . ...

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• Andy Fruchter's Homepage
• Polarization Observations
• Gauging the impact of executing science program across different COS/FUV

Databases (NSDC) of the Natural Planetary Satellites. ... NSDC: Database of astrometric observations of Natural Planetary Satellites . ... They are thoroughly looking for observations in different sources, creating their owndatabases which are then mostly inaccessible to other researchers. ... In the file "content" with explications, the reference is given to the data source as well as the bibliographic reference. ... Data sources. ... Why a specific bibliographic database for Natural satellites? ...

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... In order to compare the number of different evolutionary stages obtained and X-ray luminosity of the chosen X-ray sources with the observed galactic values we use the sum of C/O+O/C , where C and O are the calculated and observed values of a given binary type, respectively. If we make comparison for a number of different binary species (for example, we compare the number of CV, number of X-ray pulsars, ? total X-ray luminosity of LMXB, etc.), we write this criterion in the form: . ...

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• Initial Distributions of Binary Parameters
• E-P transitions for different orbits
• Nomenclature

Next: Some theory Up: userhtml Previous: Calibration . By many measures, the ATCA 3-mm observing band is a completely different domain to the other ATCA bands. ... Not surprisingly many aspects of the data reduction are also different. This chapter reviews the theory behind some of the differences, and then considers a practical approach to calibration. ... Antenna gain considerations and flux calibration . Instrumental phase . Atmospheric phase and phase calibration considerations . ...

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• OH_maser
• Southern Cross Astrophysics Conference Series
• Archive of VLBI Observations Majordomo List

The large magnetic cloud caused by coronal mass ejection at the Sun on January 6, 1997 came to the Earth at early morning on January 10 and continue to interact with Earth's magnetosphere till January 11 (see for example home page of this event prepeared by Dr. M.Peredo http://www-istp.gsfc.nasa.gov/istp/cloud_jan97/event.html ). ... During the days discussed here INTERBALL-1 satellite was in the magnetosphere (MS) near its dusk flunk - see the Fig. 1 for compearing. ...

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• Main results of the experimental and theoretical research completed in 2009
• The Exploration of the Earth's Magnetosphere"
• INTRODUCTION TO STUDY OF DECEMBER 22-23, 1996 EVENT INTERBALL Multi-Satellite

... the time of observation . ... Observing the Changing Position of the Sun To Establish Cardinal Directions . ... Observations of the Sun's apparent movement across the sky and its pattern of rising and setting in the east and west horizon helped to establish the cardinal directions. ... The final stage of the Sun's return was marked by the observation that the Sun had reached its highest altitude when the full width of your mitted hand could fill the gap between the Sun and the horizon. ...

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• ASP: An Ancient Universe - Changes in the Universe
• ASP: An Ancient Universe - The Age of the Expanding Universe

RATAN-600 OBSERVATIONS OF MICROWAVE STRUCTURE OF THE QUIET SUN T.I. Kaltman, V.M. Bogo d, A.N. Korzhavin, S.Kh. ... A small-scaled structure with the size of 20-40 arc sec is regularly observed with RATAN-600 one-dimensional observations. ... The daily monitoring with RATAN-600 observations provides p ossibilities to regularly estimate a state of the quiet Sun by emission characteristics of microwave small-scaled structure and to trace rises of new centers of activities. ...

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• CCD observations and data reduction
• Observations and data reduction
• Getting the observations

11 august 2014/Monday: Arriving, Registration . ... The variation of solar flare coronal X-ray source spatial properties. ... Melnikov V.F., Charikov Yu.E., Kudriavtsev I.V. Directivity of X-ray and gamma-ray emission from different parts of flaring magnetic loops. ... E., Melnikov V.F. Angular characteristics of polarization degree of hard X-ray emission from different parts of flaring magnetic loops. ... The thick target model and analytical calculations of the hard X-ray emission from solar flares. ...

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• Description of database
• Страница Е.В.Милецкого / Page of Eugen Miletsky

... 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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• See Spike Run... Run, Spike, Run
• Joint Processing of Radio Data Produced by the SSRT Together With Data of Other

Solar High Resolution Studies . ... Solar Group . ... High Resolution Studies . Small Scale Activity . ... High resolution observations at different heights in the solar atmosphere have emphasized that there is no such thing as a "quiet" Sun (e.g. Schrijver et al., ... This, and the temporal coincidence of other signatures, supports the idea that microflares are indeed just miniature flares, but that one needs a very high resolution in order to observe them (Cauzzi et al., 2003, in preparation) . ...

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• Arcetri Guaranteed Time
• Abstract
• Tracing Dust in Spiral Galaxies

... 2013 May 14 . Galaxy Collisions: Simulation vs Observations . Images Credit: NASA , ESA ; Visualization: Frank Summers ( STScI ); Simulation: Chris Mihos ( CWRU ) Lars Hernquist ( Harvard ). Explanation: What happens when two galaxies collide? Although it may take over a billion years, such titanic clashes are quite common. ... Pictured above is a computer simulation of two large spiral galaxies colliding , interspersed with real still images taken by the Hubble Space Telescope . ...

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• APOD: 2001 November 8 - Under A Sunspot
• APOD: June 9, 1997 - An Auroral Ring on Jupiter
• APOD: 2007 September 27 - Hole in the Sun

... Research objects and scientific purposes . Space scientific program includes development and launch of two supersmall spacecrafts "Universitetskiy" and "Kompas-2" intended for monitoring of radiation conditions near the Earth. ... All the studies conducted in the near-Earth space are characterised by strong radiation fields. ... The circular polar orbits, which cover all the near-Earth space, are the most favorable for comprehensive studies of the radiation conditions near the Earth. ...

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... Exams and Homework . ... Local Astronomy Stuff . ... Jeff Willick's Cosmology from Stanford . Some good Internet tutorials on Cosmology . A good primer on different Galaxy types . Some Essays by Joe Silk - good information . ... First Homework Assignment (Due June 30) . Second Homework Assignment (Due July 21) . Third Homework Assignment (Due August 4) . Final Exam now Available until August 11 . This Search Engine is Best for Homework . ...

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• Intelligent Life in the Universe

... Contact A Problem of an estimation of accuracy of the asteroid CCD observations . The Minor Planet Center supported by the Interntional Astronomical Union is the main office for keeping observational data of the small Solar System bodies and their investigations. ... At Pulkovo Observatory we are estimating an accuracy of the CCD asteroid observations obtained by amateurs and professional astronomers all over the World using the MPC database. ...

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Next: SAS processing Up: Maintenance procedures Previous: Maintenance procedures Contents . Suitable observations should be longer than about 20 ksec, cover all the considered time period, and have different background levels, in particular the highest ones, so the sample should include observations taken at the beginning and end of the science window. It is helpful to consider objects for which no RGS spectrum is expected or to look at the RGS monitor pages. ... Michael Smith 2011-09-20 ...

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• Description

Nowadays at the Department the experimental and theoretical investigations, including astronomical and ionospheric observations, active experiments with space vehicles are taking place. ... Solar Corona physics and erruptive phenomenae. ... Stellar astronomy. ... The Department has organized and put into practice more then 50 expeditions for observation of Solar ecllipces, aurorae polaris, comets, meteor streams, controlled space experiments, and also for investigations of geophysical characteristics. ...

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• Physics of Heliosphere
• Solar Physics
• Solar-Terrestrial Connections

... AGES Precursor Observations Ї Targeted the M74 ( NGC 628) group Ї Noise falls as t (to 200s) AGES Precursor Observations Ї Targeted the M74 ( NGC 628) group Ї Noise falls as t (to 200s) AGES Precursor Observations Ї Targeted the M74 ( NGC 628) group Ї Noise falls as t (to 200s) Ї Detected 5 galaxies in the group KDG 010 dw0137+1540 UGC 1171 AGES Precursor ...

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• http://www.naic.edu/vscience/schedule/tpfiles/HeilestagA2220tp.pdf
• http://www.naic.edu/aisr/worldday/wd_intro.html
• http://www.naic.edu/~phil/hardware/wapps/pulsarStartTm_jan07.html