Search Publications
The FERRUM Project: Experimental transition probabilities of [Fe II] and astrophysical applications
Lundberg, H.; Johansson, S.; Hartman, H. +9 more
We report on experimental transition probabilities for thirteen forbidden [Fe II] lines originating from three different metastable Fe Ii levels. Radiative lifetimes have been measured of two metastable states by applying a laser probing technique on a stored ion beam. Branching ratios for the radiative decay channels, i.e. M1 and E2 transitions, …
Tomography of a stellar X-ray corona: alpha Coronae Borealis
Mewe, R.; Audard, M.; Güdel, M. +1 more
We interpret the X-ray light curve obtained by XMM-Newton during a total X-ray eclipse in the nearby binary star
Stellar sources in the ISOGAL intermediate bulge fields
Ganesh, S.; Omont, A.; Schultheis, M. +3 more
We present a study of ISOGAL sources in the ``intermediate'' galactic bulge (|l|< 2o, |b| ~ 1o-4o), observed by ISOCAM at 7 and 15 mu m. In combination with near-infrared (I, J, Ks) data of DENIS survey, complemented by 2MASS data, we discuss the nature of the ISOGAL sources, their luminosities, the i…
On the measurement bias of low-l solar p-mode excitation parameters: The impact of a ground-based window function
Chaplin, W. J.; Elsworth, Y.; Isaak, G. R. +4 more
We present a study of the impact of a ground-based, multi-station window function on estimates of the power and damping of low-l solar p modes extracted from fits to resonant structure in the frequency domain. The window functions come from six-site observations made by the Birmingham Solar-Oscillations Network (BiSON) over the 10-yr period beginn…
The association of transequatorial loops in the solar corona with coronal mass ejection onset
Harra, L. K.; Matthews, S. A.; Foley, C. A. +1 more
It has been shown that transequatorial loops can disappear in association with the onset of a coronal mass ejection (CME) (Khan & Hudson \cite{khan}). We extend this result by considering a larger sample of transequatorial loop systems (TLS) to investigate their associated flaring and CME activity. We find 10 of a total 18 TLS considered here …
Detecting planetary transits in the presence of stellar variability. Optimal filtering and the use of colour information
Aigrain, S.; Favata, F.; Carpano, S.
Space-based photometric transit searches, such as the ESA mission Eddington (planned for launch in 2007), are expected to detect large numbers of terrestrial planets outside the solar system, including some Earth-like planets. Combining simplicity of concept with efficiency, the transit method consists in detecting the periodic luminosity drop in …
Orbits and masses of twenty double stars discovered by Paul Couteau
Docobo, J. A.; Ling, J. F.
In this article we present the orbits and masses of 20 double stars discovered by P. Couteau at the Nice Observatory (France), namely WDS 01450+2703 (COU 750), 03321+4340 (1688), 03423+3141 (691), 06503+2409 (768), 12409+2708 (596),14138+3059 (606), 15390+2545 (612), 16584+3943 (1289), 17075+3810 (1291), 17221+2310 (415), 18035+ 4032 (1785), 18043…
The INTEGRAL Mass Model - TIMM
Hill, A. B.; Bird, A. J.; Dean, A. J. +8 more
The INTEGRAL Mass Model (TIMM) was started in 1995 and aimed to create a detailed geometrical model of the whole INTEGRAL satellite on computer. In parallel, a comprehensive Monte Carlo simulation code (called GGOD) has been developed. The mass model and the Monte Carlo code together enable the in-flight operation of INTEGRAL to be simulated at th…
Photoionized O VI absorbers toward the bright QSO HE 0515-4414
Reimers, D.; Baade, R.; Levshakov, S. A. +1 more
We report on detailed Monte Carlo inversion analysis of five O Vi systems from the spectrum of the bright quasar HE 0515-4414 (zem = 1.71). The associated system at zabs = 1.697 with the neutral hydrogen column density N(H I) = 4.4*E13 cm-2, shows pronounced absorption from highly ionized transitions of …
GRB 030227 : The first multiwavelength afterglow of an INTEGRAL GRB
Pian, E.; Palazzi, E.; Greiner, J. +39 more
We present multiwavelength observations of a gamma-ray burst detected by INTEGRAL (