We analyze archival ROSAT HRI, ROSAT PSPC, and ASCA data of the X-rayÈfaint early-type galaxy NGC 4697. The joint ROSAT PSPC]ASCA spectrum is Ðtted by a two-component thermal model, a MEKAL model with keV with low metallicity and a bremsstrahlung kT MEKAL \ 0.26 ~0.03 `0.04 model with keV. A similar model was found to Ðt the spectra of another faint earlykT BREM \ 5.2 ~1.6 `3.0 type galaxy (NGC...

Abstract. We report the results of a deep spatial, spectral, and timing analysis of ROSAT HRI and PSPC observations of the edge-on starburst galaxy NGC 253. In this first paper, point-like X-ray sources detected within the galaxy and in the field are discussed. The sources are characterized by their X-ray properties (including comparisons with results from the Einstein and ASCA satellites), by ...

We deÐne a 90% complete, volume-limited sample of 31 z\ 0.1 X-ray clusters and present a systematic analysis of public ROSAT PSPC data on 22 of these objects. Our e†orts are undertaken in support of the Penn/OVRO Sunyaev-Zeldovich E†ect (SZE) survey, and to this end we present predictions for the inverse Compton optical depth toward all 22 of these clusters. We have performed detailed Monte Car...

All 543 pointed observations of the ROSAT High Resolution Imager (HRI) with exposure times higher than 50 sec and performed between 1990 and 1998 in a field of 10 x 10 covering the Large Magellanic Cloud (LMC) were analyzed. A catalogue was produced containing 397 X-ray sources with their properties measured by the HRI. The list was cross-correlated with the ROSAT Position Sensitive Propotional...

We have analyzed ASCA and ROSAT PSPC spectra and images of the galaxy cluster Abell 2029. The ASCA spectra of the cluster indicate that the gas temperature declines with radius. The PSPC image shows that the cluster is very regular and smooth. Also, there is no significant evidence for any irregularities in the temperature distribution in the cluster, as would be produced by a subcluster merger...

We have analyzed ASCA and ROSAT PSPC spectra and images of the galaxy cluster Abell 2029. The ASCA spectra of the cluster indicate that the gas temperature declines with radius. The PSPC image shows that the cluster is very regular and smooth. Also, there is no significant evidence for any irregularities in the temperature distribution in the cluster, as would be produced by a subcluster merger...

The bilayer phase transitions of palmitoylstearoyl-phosphatidylcholine (PSPC), diheptadecanoyl-PC (C17PC) and stearoylpalmitoyl-PC (SPPC) which have the same total carbon numbers in the two acyl chains were observed by differential scanning calorimetry and high-pressure optical method. As the temperature increased, these bilayers exhibited four phases of the subgel (Lc), lamellar gel (L beta'),...

The spectrum of the 1.0–8.0 keV cosmic X-ray background (CXB) at galactic latitudes >|25| has been measured using the BeppoSAX LECS and MECS instruments. The spectrum is consistent with a power-law of photon index 1.40±0.04 and normalization 11.7±0.5 photon cm s keV sr at 1 keV. Our results are in good agreement with previous ROSAT PSPC (Georgantopuolos et al. 1996), ASCA GIS (Miyaji et al. 199...