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A Simultaneous RXTE and XMM-Newton Observation of the Broad-Line Radio Galaxy 3C 111
Eracleous, Michael; Gliozzi, Mario; Mushotzky, Richard F. +2 more
We present the results of simultaneous XMM-Newton and RXTE observations of the broad-line radio galaxy 3C 111. We find that the Compton reflection bump is extremely weak; however, broad residuals are clearly present in the spectrum near the Fe Kα emission line region. When fitted with a Gaussian emission line, the feature has an equivalent width o…
The Vela Pulsar in the Ultraviolet
Pavlov, George G.; Kargaltsev, Oleg; Romani, Roger W.
We describe time-tagged observations of the Vela pulsar (PSR B0833-45) with the HST STIS MAMA UV detectors. Using an optimal extraction technique, we obtain an NUV light curve and crude FUV phase-resolved spectra. The pulse is dominated by complex nonthermal emission at all phases. We obtain approximate spectral indices for the brightest pulse com…
The Absorption Signature of Six Mg II-selected Systems over 0.5 <= z <= 0.9
Charlton, Jane C.; Churchill, Christopher W.; Ding, Jie
We present the results of photoionization modeling of six Mg II-selected absorption systems, at redshift 0.5<=z<=0.9, along lines of sight toward three quasars: PG 1241+176, PG 1248+401, and PG 1317+274. These are part of a larger sample of ~20 Mg II absorbers at intermediate redshift, which facilitates a survey of the properties of, and pro…
The XMM-Newton Needles in the Haystack Survey: the local X-ray luminosity function of `normal' galaxies
Georgakakis, A.; Georgantopoulos, I.; Koulouridis, E.
In this paper we estimate the local (z < 0.22) X-ray luminosity function of `normal' galaxies derived from the XMM-Newton Needles in the Haystack Survey. This is an on-going project that aims to identify X-ray-selected normal galaxies (i.e. non-AGN dominated) in the local Universe. We are using a total of 70 XMM-Newton fields covering an area o…
Large-Scale CO and [C I] Emission in the ρ Ophiuchi Molecular Cloud
Kulesa, Craig A.; Hungerford, Aimee L.; Walker, Christopher K. +2 more
We present a comprehensive study of the ρ Ophiuchi molecular cloud that addresses aspects of the physical structure and condition of the molecular cloud and its photodissociation region (PDR) by combining far-infrared and submillimeter-wave observations with a wide range of angular scale and resolution. We present 1600 arcmin2 maps (2.3…
X-Ray Luminosity and Absorption Column Fluctuations in the H2O Maser Galaxy NGC 4258 from Weeks to Years
Filippenko, Alexei V.; Greenhill, Lincoln J.; Fruscione, Antonella +3 more
We report monitoring of the 0.3-10 keV spectrum of NGC 4258 with the XMM-Newton Observatory at five epochs over 1.5 yr. We also report reprocessing of an overlapping four-epoch series of archival Chandra observations (0.5-10 keV). By including earlier ASCA and BeppoSAX observations, we present a new, 9 year time series of models fitted to the X-ra…
The 10 µm Feature of M-Type Stars in the Large Magellanic Cloud and the Dust Condensation Sequence
Abraham, P.; Speck, A. K.; Dijkstra, C. +1 more
We present 7-14 µm Infrared Space Observatory (ISO) spectroscopy of 12 M-type evolved stars in the Large Magellanic Cloud (LMC), in order to study the dust mineralogy and condensation process around these stars. The sample stars show a broad dust feature in the 7-14 µm region, which is seen in either emission or (self-) absorption. The…
Magnetopause current as seen by Cluster
Balogh, A.; Dunlop, M. W.
The four-spacecraft, magnetic field measurements on Cluster can be combined to produce an accurate determination of the electric current in the magnetopause boundary during stable magnetopause crossings. For events that are planar on the scale of the spacecraft configuration, the thickness of the current layer can be accurately estimated from its …
X-ray bright optically inactive galaxies in XMM-Newton/Sloan Digital Sky Survey fields: more diluted than absorbed?
Georgakakis, A.; Georgantopoulos, I.
We explore the properties of X-ray bright optically inactive galaxies (XBONGs) detected in the 0.5-8 keV spectral band in 20 public XMM-Newton fields overlapping with the Sloan Digital Sky Survey (SDSS). We constrain our sample to optically extended systems with logfX/fopt > -2 that have spectroscopic identifications avail…
The Model Dependence of Solar Energetic Particle Mean Free Paths under Weak Scattering
Mason, G. M.; Zhang, M.; Qin, G. +2 more
The mean free path is widely used to measure the level of solar energetic particles' diffusive transport. We model a solar energetic particle event observed by Wind STEP at 0.31-0.62 MeV nucleon-1, by solving the focused transport equation using the Markov stochastic process theory. With different functions of the pitch angle diffusion …