We study the far-infrared emission properties of the nearby starburst galaxy NGC 253 based on IRAS maps and an ISOPHOT map at 180 μm. Based on the analysis of the light profiles, we have been able to identify three main structural components: an unresolved nuclear component, an exponential disk, and a kiloparsec-scale bar. In addition, we also

SAX J1711.6-3808 is an X-ray transient in the Galactic bulge that was active from January through May of 2001 and whose maximum 1-200 keV luminosity was measured to be 5x 10-9 erg cm-2 s-1 which is less than ~ 25% of the Eddington limit, if placed at a distance equal to that of the galactic center. We study the X-ray data that were taken of this

We have obtained linear polarization measurements of stars along the western side of the IRAS Vela Shell toward HD 62542. From 16 CCD fields distributed along the ionization front (I-front) we have built a catalog of 856 objects with polarization signal-to-noise ratio larger than 10. We detect very significant levels of polarization and hence an

This paper presents a new generation of long linear butted arrays developed at LETI / LIR and dedicated to high resolution IR imaging for space and airborne applications. These IR focal plane arrays are based on modular architecture composed of butted CdHgTe photovoltaic detection circuits and Si CMOS multiplexers. CdHgTe detectors are made with

The best-fitting two-dimensional plane within the three-dimensional space of spiral galaxy disc observables (rotational velocity vrot, central disc surface brightness μ0=-2.5logI0 and disc scalelength h) has been constructed. Applying the three-dimensional bisector method of regression analysis to a sample of ~100 spiral galaxy discs that span more

Observations of the optical counterpart to XTE J1650-500 with the Magellan 1 telescope find it fainter than expected based on reports of it's possible detection on the DDS2 red (Groot etal IAUC 7708) and blue (Castro-Tirado etal IAUC 7707) plates. The observations were made with the Sackler MagIC CCD camera in non-photometric conditions on 03 Aug