Search Publications
XMM-Newton observations of the giant H II region N 11 in the LMC
Gosset, E.; Nazé, Y.; Chu, Y. -H. +3 more
Using the sensitive XMM-Newton observatory, we have observed the giant H II region N 11 in the LMC for ∼30 ks. We have detected several large areas of soft diffuse X-ray emission along with 37 point sources. One of the most interesting results is the possible association of a faint X-ray source with BSDL 188, a small extended object of uncertain n…
Constraining the X-Ray Luminosities of Asymptotic Giant Branch Stars: TX Camelopardalis and T Cassiopeia
Soker, Noam; Kastner, Joel H.
To probe the magnetic activity levels of asymptotic giant branch (AGB) stars, we used XMM-Newton to search for X-ray emission from two well-studied objects, TX Cam and T Cas. The former star displays polarized maser emission, indicating magnetic field strengths of B~5 G, and the latter is one of the nearest known AGB stars. Neither star was detect…
Observations of lower hybrid cavities in the inner magnetosphere by the Cluster and Viking satellites
André, M.; Maksimovic, M.; Eriksson, A. +1 more
Available from http://www.copernicus.org/site/EGU/annales/22/8/2961.htm?FrameEngine=false;
Relating magnetic field strengths to hard X-ray emission in solar flares
van Driel-Gesztelyi, L.; Harra, L. K.; Matthews, S. A. +1 more
The observation of hard X-ray (HXR) emission in solar flares provides important diagnostic information about the acceleration and subsequent transport of energetic electrons in the flare process. However, while hard X-rays are thought to be emitted from the flare footpoints through thick-target bremsstrahlung interactions, the details of the trans…
An Extreme, Blueshifted Iron-Line Profile in the Narrow-Line Seyfert 1 PG 1402+261: An Edge-on Accretion Disk or Highly Ionized Absorption?
Turner, T. J.; Porquet, D.; Reeves, J. N.
We report on a short XMM-Newton observation of the radio-quiet narrow-line Seyfert 1 galaxy PG 1402+261. The EPIC X-ray spectrum of PG 1402+261 shows a strong excess of counts between 6 and 9 keV in the rest frame. This feature can be modeled by an unusually strong (equivalent width 2 keV) and very broad (FWHM velocity of 110,000 km s-1…
The Beagle 2 environmental sensors: science goals and instrument description
Patel, M. R.; Zarnecki, J. C.; Wilson, C. F. +12 more
A suite of instruments on the Beagle 2 Mars lander was designed and built in order to investigate the environmental conditions at the landing site. The sensor suite was capable of measuring air temperature at two heights, surface level pressure, wind speed and direction, saltated particle momentum, UV flux (diffuse and direct at five wavelengths),…
INTEGRAL observations of the peculiar BeX System SAX J2103.5+4545
Connell, P.; Reig, P.; Blay, P. +3 more
We present an INTEGRAL data analysis of the X-ray transient
High-Resolution Ultraviolet Spectra of the Dwarf Seyfert 1 Galaxy NGC 4395: Evidence for Intrinsic Absorption
Filippenko, A. V.; Turner, T. J.; Kraemer, S. B. +5 more
We present ultraviolet spectra of the dwarf Seyfert 1 nucleus of NGC 4395, obtained with the Far Ultraviolet Spectroscopic Explorer (FUSE) and the Hubble Space Telescope Space Telescope Imaging Spectrograph at velocity resolutions of 7-15 km s-1. We confirm our earlier claim of C IV absorption in low-resolution UV spectra and detect a n…
Short-Duration Active Region Brightenings Observed in the Extreme Ultraviolet and Hα by the Solar and Heliospheric Observatory Coronal Diagnostic Spectrometer and Hida Domeless Solar Telescope
Fludra, A.; Brooks, D. H.; Kurokawa, H. +6 more
We present the first detection of an Hα counterpart to the EUV blinker. The observations come from a coordinated campaign between the Hida Observatory Domeless Solar Telescope (DST) and the Solar and Heliospheric Observatory Coronal Diagnostic Spectrometer (CDS) conducted in 2002 July and August. Utilizing studies designed for high-cadence observa…
Subaru Deep Spectroscopy of a Star-forming Companion Galaxy of BR 1202-0725 at z=4.7
Ohyama, Youichi; Taniguchi, Yoshiaki; Shioya, Yasuhiro
We present deep spatially resolved optical spectroscopy of the northwest companion galaxy of the quasar BR 1202-0725 at z=4.7. Its rest-frame UV spectrum shows star-forming activity in the nuclear region. The Lyα emission profile is symmetric with wavelength, while its line width is unusually wide (FWHM~=1100 km s-1) for such a high-z s…