The black hole binary V404 Cyg has provided a primary test bed for models of accretion in quiescent black hole binaries because it is by far the brightest in the X-ray band. Most published work, however, has been based on non-simultaneous data spanning many years since its major outburst in 1989. We present the most complete spectral energy

Some neutron star X-ray transients (the quasi-persistent transients) spend an unusually long time in outburst, with outbursts lasting years to decades rather than the usual weeks to months. During these outbursts, the neutron star crust gets heated significantly out of thermal equilibrium with the core and thus once back in quiescence, the crust

Constellation-X will obtain for the first time high quality X-ray spectra for all classes of X-ray sources, over a wide range of luminosity and distance. It is the second priority in the National Academy of Sciences Decadal survey in the major space based missions category (after JWST). Over the past few years, NASA budgets for SMD have been

We present an analysis of thermal emission from comet 162P/Siding Spring (P/2004 TU12) measured during its discovery apparition in 2004 December. The comet showed no dust coma at this time, so we have sampled emission from the comet's nucleus. Observations using the Mid-Infrared Spectrometer and Imager (MIRSI) were performed at NASA's Infrared

Context: .At least a fraction of the atomic hydrogen in spiral galaxies is suspected to be the result of molecular hydrogen which has been dissociated by radiation from massive stars. Aims: .In this paper, we extend our earlier set of data from a small region of the Western spiral arm of M 81 with CO observations in order to study the interplay

We present a complete analysis, which includes morphology, kinematics, stellar populations, and N-body simulations, of CGCG 480-022, the most distant (cz=14,317 km s-1) isolated galaxy studied so far in such detail. The results all support the hypothesis that this galaxy has suffered a major merger event with a companion of ~0.1 times its mass