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Fluctuations in the Intensity of Radiation Emerging from a Multicomponent Stochastic Atmosphere. II
Nikoghossian, A. G.; Aboudarham, J.; Mouradian, Z.
This part of a series of papers examines the more general problem in which it is assumed that the fluctuations in the intensity of radiation emerging from a medium are caused by random variations in both the optical thickness of the structural elements and the power of the energy sources contained in them. The frequency dependence of the relative …
Solar Energetic Particles from the October/November 2003 Events Observed by the Ulysses COSPIN Instruments Near 5 AU
Dalla, S.; Kunow, H.; Heber, B. +7 more
Compiled catalogue of the MK spectral classifications, including astrometric and photometric data and its application
Rybka, S. P.
The catalogue constructed as a tool for stellar kinematic analysis is described. It contains up-to-date information on spectral classifications in the MK system, positions and proper motions in the ICRS system, as well as BV magnitudes for 169,843 single stars. Astrometry and photometry were mainly selected from the Tycho-2. MK spectral types and …
Cluster/rapid energetic electron observations at the dayside magnetospheric boundary
Grande, M.; Carter, M.; Balogh, A. +9 more
We study the energetic electrons by the Cluster-II Rapid instrument on a dayside high-latitude pass on the night between March 21/22, 2001. The Cluster satellites were flying outward in the pre-noon sector, passing a cusp/cleft type region roughly at midnight. Contrary to earlier observations of high fluxes of energetic particles in the high-latit…
3D Plasma Structures Observed by the Four Cluster Spacecraft
Escoubet, C. P.; Goldstein, M.; Laakso, H.
In-Situ Heating in Active Region Loops
Wang, T.; Curdt, W.; Landi, E. +1 more
We report new observational results and insights in the energy release during transient events on sub-flare level in active region coronal loops. Our work is based on multi-temperature observations obtained high above the limb by the SUMER spectrometer on SOHO. We conclude that the energy is impulsively injected into the loop system from one and o…
Energetic electron observations of magnetospheric boundaries using the imaging electron spectrometers on Cluster and Polar
Grande, M.; Davies, J. A.; Daly, P. W. +7 more
Electrons with energies of several tens to several hundreds of keV provide a powerful diagnostic for the acceleration processes associated with magnetospheric boundaries and phenomena. Electrons of these energies can be detected by the imaging electron spectrometer (IES) component of the RAPID experiment onboard each of the quartet of Cluster spac…
Determining the astronomical refraction and building the radio wave refractive delay model measured (II) - Using Hipparcos Catalogue as working catalogue
Yang, Lei; Tie, Qiong-Xian; Li, Bin-Hua +2 more
Demands on the working catalogue when determining the astronomical refraction and influences of systematic error of the catalogue are related. And the systematic error of the FK5 with respect to Hipparcos Catalogue is put forward so as to explain why all the earlier star catalogues are inapplicable to refraction measurement. The characteristic of …
Third San Juan photoelectric astrolabe catalogue (CPASJ3)
Zhao, G.; Alonso, E.; Manrique, W. T. +9 more
Resulting from the cooperation between Beijing, San Juan and La Plata Astronomical Observatories, the photoelectric astrolabe Mark II(PAII) of the Beijing Astronomical Observatory was moved and installed at the San Juan Observatory, Argentina in January, 1992 for observations of stars in the southern hemisphere. Using the data observed with the in…
New Gamma Ray sources discovered by INTEGRAL
Combi, J. A.
One of the strategic objective of the INTEGRAL mission is a regular survey of the galactic plane complemented by a deep exposure of the Galactic Centre. This study is carrying out by the imaging capability of IBIS, which allows the detection of sources at the mCrab level with an angular resolution of 12 arcmin and a point souce location accuracy o…