Search Publications
Plan management system for space science mission systems
Chaizy, P. A.; Dimbylow, T. G.; Hapgood, M. A. +1 more
The number and complexity of systems that control Space Science Missions continues to increase. As a result, it is desirable to improve the efficiency of these systems and, in particular, their performance and their productivity. In this paper, we set out a strategy to achieve this goal. In order to talk about improving the Performance and Product…
New method for separating K- and F-corona brightness based on LASCO/SOHO data
Fainshtein, V. G.
A relatively simple (in technology) method for separating K- and F-corona brightness based on LASCO data, which makes it possible to obtain the latitude distribution of this brightness in the field of view of the LASCO C2 and C3 coronographs at any instant for which white light corona images are available, has been proposed. It has been estimated …
Planetary science: Enceladus with a grain of salt
Spencer, John
The observation that water plumes erupt from cracks on Saturn's moon Enceladus has fired speculation about a possible subsurface ocean. The latest searches for sodium salts point to the existence of such an ocean.
Statistical Analysis of Decimetric Radio Bursts, Flares, and Coronal Mass Ejections
Michalek, G.; Puchowska, K.; Rams, A.
A statistical analysis of decimetric radio bursts (RBs), X-ray flares and coronal mass ejections (CMEs) is carried out. We consider all radio bursts recorded by the Cracow Solar Radio Telescope from the beginning of 1996 until the end of 2004. It is found that the decimetric radio bursts are associated and strongly correlated with X-ray flares. Co…
A Deep XMM-Newton Observation of the Quasar 3C 287
Miller, J. M.; Siemiginowska, A.; Cackett, E. +1 more
We report on an XMM-Newton observation of the z = 1.055 quasar and Gigahertz Peaked Spectrum (GPS) source 3C 287. Our 62.3 ks observation provides an exceptional X-ray view of a prominent member of this important subclass of active galactic nuclei (AGNs). The X-ray spectra of 3C 287 are consistent with a simple absorbed power law with a spectral i…
X-ray emission from the Sagittarius D region
Koyama, Katsuji; Matsumoto, Hironori; Nobukawa, Masayoshi +2 more
We report results of the Suzaku observation toward the Sagittarius (Sgr) D region. Diffuse X-ray emission was clearly detected from inside the shell-type supernova remnant, the Sgr D SNR and is named G 1.02-0.18. A hint of an iron line is seen in the spectrum, suggesting that G 1.02-0.18 is a thin thermal plasma with the temperature of kT∼ 2keV . …
High energy emission from AGN cocoons in clusters of galaxies
Nagai, H.; Kawakatu, N.; Kino, M. +1 more
Gamma-ray emission from cocoons of young radio galaxies is predicted. Considering the process of adiabatic injection of the shock dissipation energy and mass of the relativistic jet into the cocoon, we find that the thermal electron temperature of the cocoon is typically predicted to be of the order of ∼MeV, and is determined only by the bulk Lore…
Responses of properties in the plasma sheet and at the geosynchronous orbit to interplanetary shock
Yuo, Li; Lui, ZhenXing; Zuo, PingBing +2 more
On July 22, 2004, the WIND spacecraft detected a typical interplanetary shock. There was sustaining weak southward magnetic field in the preshock region and the southward field was suddenly enhanced across the shock front (i.e., southward turning). When the shock impinged on the magnetosphere, the magnetospheric plasma convection was abruptly enha…
Estimation of Errors in the Transverse Velocity Vectors Determined from HINODE/SOT Magnetograms Using the NAVE Technique
Moon, Yong-Jae; Chae, Jong-Chul
A measurement of the faint source correlation function in the GOODS and UDF surveys
Blandford, Roger; Morganson, Eric
We present a stable procedure for defining and measuring the two point angular autocorrelation function, w(θ) = [θ/θ0(V)]-Γ, of faint (25 < V < 29), barely resolved and unresolved sources in the Hubble Space Telescope Great Observatories Origins Deep Survey and Ultra Deep Field data sets. We construct catalogues that in…