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The origin of X-ray emission of two distant (z >1) cluster candidates with XMM-Newton
Arnaud, M.; Arnouts, S.; Benoist, C. +8 more
We present here a study of XMM-Newton data of two distant galaxy cluster candidates. One of these was discovered serendipitously in near infrared data,
Slow Solar Wind: Sources and Components of the Stream Structure at the Solar Maximum
Vladimirsky, K. V.; Lotova, N. A.; Obridko, V. N.
We study the sources and components of the solar-wind spatial stream structure at the maximum of the solar cycle 23. In our analysis, we use several independent sets of experimental data: radio-astronomical observations of scattered radiation from compact sources with the determination of the distance from the Sun to the inner boundary of the tran…
Photometry with a periodic grid. II. Results for J2 Europa and S6 Titan
Hestroffer, D.
The Hipparcos satellite successfully gathered astrometric and photometric information for a few solar system objects including natural satellites. In contrast to the case for asteroids, the Hipparcos main-mission does not provide the photometry - in the conventional sense - of planetary satellites. Nevertheless, valuable photometric results can be…
Use of non-radiation hardened micro-circuits in space — Experience from the cluster digital wave processor
Alleyne, H. St. C.; Yearby, K. H.
The trend for higher performance, lower cost, space instrumentation is leading towards the use commercial or industrial electronic parts, rather than specifically radiation hardened military grade parts. The micro-processor and memory devices used in the Cluster Digital Wave Processor (DWP) are not specifically radiation hardened parts, although t…
Hot loop oscillations seen by SUMER
Solanki, S. K.; Curdt, W.; Innes, D. E. +2 more
Chasing coronaij x-ray emission to the end of the pleiades main sequence … and beyond?
Briggs, K. R.; Pye, J. P.
We have used a 40-ks XMM-Newton observation to examine the X-ray emission of 33 proposed M-type members in. the core of the Pleiades. We reach a limiting X-ray luminosity of LX ≈ × 10 27 erg s -1 in the field centre and detect 17 of 19 members with MIc < 10.5 (where MIc
A transient event in lines of Ne V, VI and VII
Jordan, C.; Houdebine, E. R.
We report observations of a transition region brightening made with the Coronal Diagnostic Spectrometer onboard the Solar and Heliospheric Observatory. We observed a region of the quiet Sun in 12 spectral lines with temperatures of formation from =~ 3 x 104 K to 1.1 x 106 K. The transient event occured in a network boundary r…
Eta Carinae: Bullet Streams and Colliding Wind Shocks
Currie, D. G.
Eta Carinae, the most massive and most luminous star in our Galaxy, erupted in 1842 with an energy rivaling a supernova. It ejected approximately two solar masses of material to form an extended bipolar nebula (the homunculus), a variety of massive ``bullets'' (NN and NS knots and the South Bar) and the ``spikes'' (long narrow strings of bullets).…
Far-Ultraviolet light curves of the δ Scuti variable: β Cassiopeiae
Cugier, H.; Daszyńska, J.
Cluster magnetic field observations of magnetospheric boundaries
Balogh, A.; Horbury, T. S.; Lucek, E. A. +7 more
Early Cluster magnetic field observations of boundaries and boundary layers in the near-Earth environment are reviewed. By combining data from four spacecraft, typically separated by ∼600 km, the scale, orientation and motion of structures can be deduced. Early results from the magnetic field investigation are reviewed, such as estimates of the or…