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FUV and X-ray grating spectra of novae and supersoft X-ray sources
Orio, M.
I review recent FUV and X-ray observations of classical and recurrent novae and supersoft X-ray sources, among them potential type Ia supernova progenitors. FUSE spectra show emission lines of O VI, which appear to be produced very close to the white dwarf of the binary system. In one case, these lines have allowed a measurement of the white dwarf…
Search for narrow energy-shifted lines in AGN spectra in the XMM-Newton archive
Bianchi, S.; Guainazzi, M.; Santos-Lleo, M. +2 more
Thanks to the large effective area and the spectral resolution of current X-ray satellites, the detection of X-ray narrow spectral features in the 5-7 keV band is becoming commonplace in many AGN observations. Such lines, both in emission and in absorption, are mostly interpreted as arising from Iron atoms. When observed with some displacement fro…
XMM-Newton and Chandra observations of SHEEP sources
Georgakakis, A.; Nandra, K.; Papadakis, I. E. +3 more
We present Chandra and XMM-Newton observations of 12 bright [f(2-10keV) > 10-13ergcm-2s-1] sources from the ASCA search for the High Energy Extragalactic Population (SHEEP) survey. Most of these have been either not observed or not detected previously with the ROSAT mission, and therefore they constitute a sampl…
Modelling the large particle environment of comet 67P/Churyumov Gerasimenko
Agarwal, J.; Grün, E.; Müller, M. +1 more
A method is presented to simulate images of a cometary dust trail in consistency with observed gas and dust production rates. It is also applicable to dust tails including neckline and antitail phenomena. Our main objective is to analyse the amount of mm-sized and larger particles within a given image. These are interesting to us because their emi…
Apsidal Motion and Photometric Elements of the Eccentric Eclipsing Binary V401 Lacertae
Demircan, Osman; Bulut, Ibrahim
New (UBV) photometric observations of the recently discovered eccentric orbit binary V401 Lacertae were analyzed by using the Wilson-Devinney program. Seven new minimum times were estimated by using new observations. The analysis of the light curves and all available minimum times has revealed that the system is detached, with the orbital eccentri…
KET Ulysses Observations of SEP in and out of the Ecliptic
Heber, Bernd; Struminsky, Alexei
Observations of eight solar energetic particle (SEP) events in the polar heliospheric regions and six events near the Jupiter orbit and their implications for the current paradigm of particle acceleration and propagation in the heliosphere are discussed. These events are easily identified with well-known episodes of the solar activity in 1992, 199…
Relations Between Bursty Bulk Flows in the Magnetotail and Substorms
Dandouras, I.; Reme, H.; Cao, Jin-Bin +3 more
By using the data of three satellites of Cluster from 2001 to 2002, we study BBFs in the magnetotail and its relation to substorms. It is found that sometimes one or two of three satellites have already observed the BBF, and however the rest haven't. The reasons are as follows: (1) while the bulk flows satisfy the selection criterion of BBFs, the …
HD 131861, a Double-Line Spectroscopic Triple System
Henry, Gregory W.; Pourbaix, D.; Fekel, Francis C. +1 more
Our red-wavelength spectroscopic observations of HD 131861, a previously known single-line multiple system, span 20 years. Now lines of two components, the short-period F5 V primary and G8 V secondary, have been detected. The inner orbit is circular with a period of 3.5507439 days, while the outer orbit of the system has a period of 1642 days or 4…
The Bright Ages Survey. I. Imaging Data
Salim, Samir; Rich, R. Michael; Frogel, Jay A. +3 more
This is the first paper in a series presenting and analyzing data for a K-selected sample of galaxies collected in order to identify and study galaxies at moderate to high redshift in rest-wavelength optical light. The sample contains 842 objects over six separate fields covering 75.6 arcmin2 down to K=20-20.5. We combine the K band wit…
Ground calibration of the XRS microcalorimeter onboard Suzaku
Ishisaki, Y.; Mitsuda, K.; Boyce, K. R. +13 more
The XRS microcalorimeter was launched in July 2005 as part of the Suzaku mission. It covers the energy band from 0.3 to 10 keV with a nearly constant energy resolution of 6 eV and a peak effective area of 200 cm 2 at 1.5 keV. The XRS will provide unprecedented throughput and resolving power, particularly at high energies and for extende…