Biography:

In the past B. Cordier has collaborated on articles with F. Pelaez and N. Diallo. One of their most recent publications is First gamma-ray burst observations with the sigma telescope. Which was published in journal Advances in Space Research.

More information about B. Cordier research including statistics on their citations can be found on their Copernicus Academic profile page.

B. Cordier's Articles: (10)

First gamma-ray burst observations with the sigma telescope

AbstractThe anticoincidence shield of the SIGMA telescope is being used as a Gamma-Ray Burst detector. Six months after the launch of the GRANAT spacecraft, a dozen bursts have been detected whose main characteristics are presented here; in particular, the first observations reveal a unusually high rate of short, hard bursts.

The first soft gamma-ray image of the Galactic Centre with arc-min accuracy

AbstractPreliminary results from the SIGMA telescope observations of the Galactic Centre in the energy range of 35 keV - 1.3 MeV are presented and discussed. The telescope makes use of the coded aperture imaging technique. Our images from 35 to 300 keV reveal a strong source identified without any doubt with 1E 1740.7–2942, i. e. more than 45 arcmin away from the Galactic Nucleus. If this source is at the distance of the Galactic Centre, it is one of the most luminous objects in the galaxy at these energies.

Induced radioactive continuum background in the integral spectrometer (SPI) germanium detectors

AbstractThis paper presents a detailed study of the β decay continuum background in a spaceborn Ge spectrometer (SPI) and methods for its reduction. In the nuclear γ-ray line energy range (10 keV, 20 MeV), much of the continuum background in the Ge spectrometers is due to the cosmic-ray generated protons and neutrons interacting in the detectors themselves. We have performed Monte Carlo simulations to calculate the neutron spectrum inside the BGO shield of the spectrometer SPI, thus allowing the calculation of the continuum background induced by the β− and β+ decays of the Ge residuals nuclides. It is shown that if we use the Pulse Shape Discrimination (PSD) and energetic signatures in energy ranges well chosen to reduce the background, the main effect is an improvement of the sensitivity of SPI.

The ECLAIRs micro-satellite mission for gamma-ray burst multi-wavelength observations

AbstractGamma-ray bursts (GRB)—at least those with a duration longer than a few seconds—are the most energetic events in the Universe and occur at cosmological distances. The ECLAIRs micro-satellite, to be launched in 2009, will provide multi-wavelength observations of GRB, to study their astrophysics and to use them as cosmological probes. Furthermore, in 2009 ECLAIRs is expected to be the only space-borne instrument capable of providing a GRB trigger in near real-time with sufficient localization accuracy for GRB follow-up observations with the powerful ground-based spectroscopic telescopes available by then.A “Phase A study” of the ECLAIRs project has recently been launched by the French Space Agency CNES, aiming at a detailed mission design and selection for flight in 2006. The ECLAIRs mission is based on a CNES micro-satellite of the “Myriade” family and dedicated ground-based optical telescopes. The satellite payload combines a 2 sr field-of-view coded aperture mask gamma-camera using 6400 CdTe pixels for GRB detection and localization with 10 arcmin precision in the 4–50 keV energy band, together with a soft X-ray camera for onboard position refinement to 1 arcmin. The ground-based optical robotic telescopes will detect the GRB prompt/early afterglow emission and localize the event to arcsec accuracy, for spectroscopic follow-up observations.

Influence of temperature on the behaviour of INTEGRAL n-type HPGe detectors irradiated with fast neutrons

AbstractSeveral INTEGRAL n-type HPGe detectors have been irradiated by fast neutrons at different temperatures and their performances have been evaluated. Their behaviour during warm-up and cool-down cycles following the irradiations show evidence for irreversible temperature effects above 100 K. The detectors recovery after annealing was also studied.

Le délai entre prélèvement sanguin et centrifugation: source d'erreur lors de la surveillance biologique d'un traitement par l'héparine

AbstractMonitoring of heparin therapy rely on activated partial thromboplastin time (APTT) and heparinemy (H). In 12 patients receiving heparin, a delay of one hour and a half to three hours between blood collection and centrifugation showed a significant decrease of APTT and H. These variations may be responsible of inappropriate modification dosage.

Poster No 26Atteinte utéro-ovarienne révélatrice d'une périartérite noueuse

We report the case of a 81-year old woman who was admitted because of declining general health and elevated sedimentation rate. Ovaries were both enlarged on CT-scan. Hysterectomy was performed on the basis of suspected ovarian malignancy. Histologic examination revealed necrotizing vasculitis involving fallopian tubes and uterus. Treatment consisting of high-dose corticosteroids and pulses of cyclophospamide resulted in prompt clinical and biological improvement.

Article originalUne demande de retour au sexe de naissance après une chirurgie de réassignation sexuellePostoperative regrets after sex reassignment surgery: A case report☆

RésuméIntroductionLa chirurgie de réassignation sexuelle est réalisée en France après l’accord d’une équipe pluridisciplinaire composée de psychiatres, psychologues, endocrinologues et chirurgiens. Les professionnels reçoivent le patient durant au moins deux ans avant toute décision chirurgicale irréversible sur les organes sexuels.ObjectifComprendre les raisons d’un regret postopératoire et revoir nos outils d’évaluation psychiatrique et psychologique.Patient et méthodeNous présentons une demande exceptionnelle de retour au sexe de naissance quelques jours seulement après la chirurgie, chez un homme de naissance suivi pendant huit ans avant la décision chirurgicale. Nous avons étudié en détail son dossier composé des différentes consultations avec le psychiatre référent de l’unité de transsexualisme et les autres partenaires de soin. Nous avons également analysé les résultats aux tests psychologiques et le questionnaire de suivi postopératoire.RésultatsL’emploi des tests psychologiques n’a pu mettre en lumière les risques de regrets postopératoires chez cet homme. Les éléments de diagnostic différentiel ont été abordés mais le patient a menti.ConclusionLa littérature scientifique montre que les risques de regrets sont plus élevés chez les hommes ayant assumé une longue vie hétérosexuelle, exprimant une demande tardive et étant peu soutenus par leur famille ou des amis. Nous y ajoutons l’absence de vie sexuelle, l’interruption de traitement et l’absence de trouble du genre dans l’enfance comme autant de critères de risque de regret postopératoire. De plus, les tests psychologiques ne sont plus utilisés dans notre unité pour évaluer la demande d’un patient transsexuel.

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