31 Result(s)

Article

Very-high-frequency oscillations in the main peak of a magnetar giant flare

Magnetars are strongly magnetized, isolated neutron stars^1–3 with magnetic fields up to around 10¹⁵ gauss, luminosities of approximately 10³¹–10³⁶ ergs per second and rotation periods of about 0.3–12.0 s. Very en...

A. J. Castro-Tirado, N. Østgaard, E. Göǧüş, C. Sánchez-Gil, J. Pascual-Granado… in Nature (2021)

Article

The Large Observatory for X-ray Timing (LOFT)

High-time-resolution X-ray observations of compact objects provide direct access to strong-field gravity, to the equation of state of ultradense matter and to black hole masses and spins. A 10 m²-class instrument...

M. Feroci, L. Stella, M. van der Klis, T. J. -L. Courvoisier… in Experimental Astronomy (2012)

Article

Compact sources as the origin of the soft γ-ray emission of the Milky Way

The Milky Way is known to be an abundant source of γ-ray photons¹, now determined to be mainly diffuse in nature and resulting from interstellar processes². In the soft γ-ray domain, point sources are expected to...

F. Lebrun, R. Terrier, A. Bazzano, G. Bélanger, A. Bird, L. Bouchet, A. Dean… in Nature (2004)

Article

Localization of the solar flare SF900610 in X-rays with the WATCH instrument of the GRANAT observatory

During the solar flare of June 10, 1990, the WATCH instrument of the GRANAT space observatory obtained 110 localizations of the X-ray source in the X-ray range 8–20 keV. Its coordinates were measured with an a...

O. V. Terekhov, A. G. Kuzmin, A. V. Shevchenko, S. Yu. Sazonov… in Astronomy Letters (2002)

Article

Observation of quasi-periodic pulsations in the solar flare SF 900610

A quasi-periodic component was found at the maximum of the X-ray light curve for the June 10, 1990 solar flare detected by the Granat observatory. The pulsation period was 143.2±0.8 s. The intensity of the pul...

O. V. Terekhov, A. V. Shevchenko, A. G. Kuz’min, S. Yu. Sazonov… in Astronomy Letters (2002)

Article

Optical behaviour of XTE J1550-564 and XTE J1859+226 from outburst to quiescence

We present here the optical light curves of the Soft X-ray TransientsXTE J1550-564 and XTEJ1859+226 from outburst to quiescence

C. Sánchez-Fernández, A. J. Castro-Tirado, A. Giménez… in Astrophysics and Space Science (2001)

Chapter and Conference Paper

Optical Behaviour of XTE J1550–564 and XTE J1859+226 from Outburst to Quiescence

We present here the optical light curves of the Soft X-ray Transients XTE J1550–564 and XTEJ1859+226 from outburst to quiescence

C. Sánchez-Fernández, A. J. Castro-Tirado, A. Giménez, C. Zurita… in Microquasars (2001)

Chapter and Conference Paper

Assessment of Tissue Oxygenation in the Critically III

Dysoxia is inadequacy of tissue oxygenation, the condition when oxygen levels are so low that mitochondrial respiration can no longer be sustained [1]. It is assumed that tissue dysoxia and oxygen debt are maj...

B. Vallet, B. Tavernier, N. Lund in Yearbook of Intensive Care and Emergency Medicine 2000 (2000)

Chapter and Conference Paper

Super-eddington luminosity in the bursting pulsar GRO J1744-28. GRANAT/WATCH results

We present the results of GRANAT/WATCH observations of the BATSE bursting pulsar GRO J1744-28 in January – March 1996, during an intense outburst of this transient. The observations started in mid-January, exa...

S. Y. Sazonov, R. A. Sunyaev, N. Lund in Accretion Disks — New Aspects (1997)

Article

Deka-keV X-ray emission associated with the onset of radio noise storms

Radio noise storms show that suprathermal electrons (a few tens of keV) are present in the vicinity of active regions during several hours or even a few days. Where and how these electrons are energized is not...

N. Crosby, N. Vilmer, N. Lund, K. -L. Klein, R. Sunyaev in Solar Physics (1996)

Article

Study of WATCH GRB error boxes

We have studied the first WATCH GRB Catalogue ofγ-ray Bursts in order to find correlations between WATCH GRB error boxes and a great variety of celestial objects present in 33 different catalogues. No particular ...

J. Gorosabel, A. J. Castro-Tirado, N. Lund, S. Brandt… in Astrophysics and Space Science (1995)

Article

Review of GRANAT observations of gamma-ray bursts

The GRANAT observatory was launched into a high apogee orbit on 1 December, 1989. Three instruments onboard GRANAT - PHEBUS, WATCH and SIGMA are able to detect gamma-ray bursts in a very broad energy range fro...

O. Terekhov, D. Denissenko, R. Sunyaev, S. Sazonov… in Astrophysics and Space Science (1995)

Chapter and Conference Paper

Observations of γ-ray bursts and solar flares with Granat

O. Terekhov, R. A. Sunyaev, D. Denisenko, A. Tkachenko, C. Barat… in Flares and Flashes (1995)

Article

On cosmic-ray cut-off terminology

The study of cosmic-ray access to locations within the geomagnetic field has evolved over the past fifty years. Cosmic-ray cut-off terminology, originally developed to describe particle access and cut-off rigi...

D. J. Cooke, J. E. Humble, M. A. Shea, D. F. Smart, N. Lund… in Il Nuovo Cimento C (1991)

Chapter

Skeletal Muscle PO₂ during Hypodynamic Sepsis

It has been hypothesized (Nelson et al., 1988, Samsel et al., 1988, Bredle et al. 1989), that sepsis is a disorder of microvascular regulation resulting in decreased O₂ transport from the capillaries to the mitoc...

G. Gutierrez, N. Lund, F. Palizas, A. Acero in Oxygen Transport to Tissue XII (1990)