Search Publications
Subaru optical observations of the two middle-aged pulsars PSR B0656+14 and Geminga
Kawai, N.; Zharikov, S. V.; Urata, Y. +6 more
Aims.We carried out a deep subarcsecond BRI imaging of the two middle-aged pulsars to establish their properties in the optical range. Methods.Astrometry and photometry methods are applied to identify the pulsars and to measure their fluxes. We also reanalyze archival ESO/NTT and HST broadband data and find that some published fluxes for Geminga w…
IGR J17252-3616: an accreting pulsar observed by INTEGRAL and XMM-Newton
Walter, R.; Stephen, J. B.; De Cesare, G. +5 more
The discovery of the X-ray source
On the CME velocity distribution
Chen, P. F.; Fang, C.; Chen, A. Q.
Context: .Coronal mass ejections (CMEs) are often categorized into flare-associated and filament-associated types, which logically is incomplete since there are many CMEs of the intermediate type.
Aims: .With this new classification, this paper aims to reexamine whether flare-associated CMEs and filament eruption-associated CMEs have distinct…
Molecular line emission in HH54: a coherent view from near to far infrared
McCoey, C.; Nisini, B.; Cabrit, S. +4 more
Aims.We present a detailed study of the infrared line emission (1-200 µm) in the Herbig-Haro object HH54. Our database comprises: high- (R ~ 9000) and low- (R ~ 600) resolution spectroscopic data in the near-infrared band (1-2.5 µm); mid-infrared spectrophotometric images (5-12 µm); and, far-IR (45-200 µm, R ~ 200) spectra …
XMM-Newton observations of the Soft Gamma Ray Repeater SGR 1627-41 in a low luminosity state
Tiengo, A.; Mereghetti, S.; Stella, L. +6 more
The sky region containing the soft gamma-ray repeater SGR 1627-41 has been observed three times with XMM-Newton in February and September 2004. SGR 1627-41 has been detected with an absorbed flux of ~9×10-14 erg cm-2 s-1 (2-10 keV). For a distance of 11 kpc, this corresponds to a luminosity of ~3× 1033 e…
Variable iron-line emission near the black hole of Markarian 766
Nandra, K.; Turner, T. J.; Porquet, D. +4 more
Aims.We investigate the link between ionised Fe X-ray line emission and continuum emission in a bright nearby AGN, Mrk 766.
Methods: .A new long (433 ks) XMM-Newton observation is analysed, together with archival data from 2000 and 2001. The contribution from ionised line emission is measured and its time variations on short (5-20 ks) timesca…
Study of a transient siphon flow in a cold loop
Doyle, J. G.; Madjarska, M. S.; Bradshaw, S. J. +2 more
Context: .The nature of loops is still a matter of debate with several explanations having been put forward. Simultaneous spectral and imaging data have the capacity to provide a new insight into mass motions, dynamics and energetics of loops.
Aims: .We report on spectral data taken with the Solar Ultraviolet Measurements of Emitted Radiation …
Searches for diffuse X-ray emission around millisecond pulsars: an X-ray nebula associated with PSR J2124-3358
Hui, C. Y.; Becker, W.
We report on diffuse X-ray emission associated with the nearby solitary millisecond pulsar PSR J2124-3358 detected with XMM-Newton and Chandra. The emission extends from the pulsar to the northwest by ~ 0.5 arcmin. The spectrum of the nebular emission can be modeled with a power-law of photon index 2.2±0.4, in line with the emission originating fr…
Properties of X-ray rich gamma ray bursts and X-ray flashes detected with BeppoSAX and Hete-2
Piro, L.; Rossi, E. M.; D'Alessio, V.
We study the spectrum of the prompt emission and the X-ray and optical afterglow fluxes of 54 X-Ray Rich Gamma Ray Burst (XRRs) and X-Ray Flashes (XRFs), observed by BeppoSAX and HETE-2. A comparison is then performed with classical Gamma Ray Bursts (GRBs). The goal of this paper is to investigate the nature of XRRs/XRFs, as high redshift GRBs or …
The star formation history of luminous infrared galaxies
Elbaz, D.; Cesarsky, C.; Charlot, S. +5 more
Aims.We constrain the past star formation histories of a sample of 25 distant (bar{z}∼ 0.7) luminous infrared galaxies (LIRGs) detected with the mid infrared cameras ISOCAM and MIPS onboard the ISO and Spitzer satellites.
Methods: .We used high-resolution VLT-FORS2 spectroscopy in addition to a comprehensive library of 200 000 model optical sp…