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Solar X-ray and EUV corona and their relation to the magnetic activity
Benevolenskaya, Elena E.
We have studied the solar magnetic cycle in corona using X-ray data from YOHKOH and Extreme Ultraviolet data from SOHO/EIT. Soft X-ray data last the period from after the maximum cycle 22 to the maximum cycle 23 (1991-2001). The SOHO/EIT Extreme Ultraviolet data are used for the period from 1996 to 2003. These data provide us a unique opportunity …
An extension of the SHARC survey
Romer, A. K.; Adami, C.; Holden, B. P. +8 more
Aims:We report on our search for distant clusters of galaxies based on optical and X-ray follow up observations of X-ray candidates from the SHARC survey, and based on the assumption that the absence of bright optical or radio counterparts to possibly extended X-ray sources could mean that they are distant clusters.
Methods: We have obtained d…
Detection of 6-cm radio-continuum emission from an EB (β-Lyrae type) variable star - HIP 68718
Filipović, M. D.; Anderson, M. W. B.
We report the 6-cm radio-continuum detection of a previously unknown radio star, HIP 68718, identified by the Hipparcos satellite as an EB or β-Lyrae type optical variable. Only five prior radio detections of this type are reported in the literature. The radio source (VLA J140402-002145) was detected at the 6σ level, with an associated <1arcsec…
Mass distribution in the most X-ray-luminous galaxy cluster RX J1347.5-1145 studied with XMM-Newton
Schindler, S.; Gitti, M.; Piffaretti, R.
Extraction of Halo Coronal Mass Ejection Asymmetry Information from LASCO Coronagraph Images
Webb, D. F.; Ling, A. G.
A method for quantifying the asymmetry attributes of coronal mass ejections (CMEs) is described. The technique developed is applied to a set of full-halo CMEs observed from 1997 to the end of 2000 by the Large Angle Spectrometric Coronagraph (LASCO) instrument on board the Solar and Heliospheric Observatory (SOHO) spacecraft. A cross section of ev…
Preface
Esposito, Larry W.; Stofan, Ellen R.; Cravens, Thomas E.
Venus has long been recognized as a sister planet to the Earth, as one of a triad of terrestrial planets with an atmosphere (Earth, Venus, Mars), and as a possible analogue for planets circling other stars. Its dense CO2 atmosphere has provided both a lesson and a warning in our understanding of the effects of greenhouse gases.
The…Searching for absorbed AGN in the 2XMM-Newton pre-release EPIC Serendipitous Source Catalogue
Watson, M. G.; Caccianiga, A.; Severgnini, P. +7 more
Aims:We aim to test a method of efficiently selecting X-ray obscured AGN in the 2XMM-Newton EPIC Serendipitous Source Catalogue.
Methods: By means of a strong correlation established using the XMM-Newton Hard Bright Sample between the intrinsic absorption and the hardness ratio to the 0.5-2.0 keV and 2.0-4.5 keV bands, an efficient way of sele…
Saturn's Dynamical Rings
Murray, Carl D.
The dynamics of the minimum solar corona during the period August October 1996
Schwenn, R.; Mierla, M.; Teriaca, L. +2 more
The paper presents the dynamics of the solar corona at the minimum phase of the solar cycle (period August-October 1996), as inferred from LASCO-C1 spectral data. LASCO-C1 is an internally occulted coronagraph aboard the SOHO spacecraft. It has a tunable Fabry-Pérot interferometer which allows taking spectral scans of selected coronal emission lin…
The COSAC experiment of the Rosetta mission: Performance under representative conditions and expected scientific return
Rosenbauer, H.; Szopa, C.; Goesmann, F. +2 more
The Cometary Sampling and Composition (COSAC) experiment is a combined gas chromatograph-mass spectrometer onboard the Philae cometary surface probe of the Rosetta mission. Its goal is to analyse, directly at the surface of a comet, the molecular and elemental compositions of the cometary nucleus samples collected by the probe. The present article…