Science Archives Publication System

Unveiling the nature of RXJ0002+6246 with XMM-Newton

DOI: 10.1111/j.1365-2966.2007.12677.x Bibcode: 2008MNRAS.384..225E

Caraveo, P. A.; Tiengo, A.; de Luca, A. +3 more

The X-ray source RXJ0002+6246 was discovered close to the supernova remnant CTB1 in a ROSAT observation performed in 1992. The source phenomenology (soft spectrum, apparent lack of counterparts, possible pulsations at 242 ms, hints for surrounding diffuse emission) led to interpret it as an isolated neutron star in a new supernova remnant. We have…

2008 • Monthly Notices of the Royal Astronomical Society

XMM-Newton 8

Huygens probe entry dynamic model and accelerometer data analysis

DOI: 10.1016/j.pss.2007.11.018 Bibcode: 2008P&SS...56..601C

Colombatti, Giacomo; Aboudan, Alessio; Ferri, Francesca +1 more

During the first phase of Huygens arrival into Titan's atmosphere the probe is subjected to gravitational and aerodynamic forces in aerodynamic hypersonic regime. Atmospheric drag exerts a strong deceleration on the capsule measured by Huygens atmospheric structure instrument (HASI) servo accelerometer. A 6 DOF (Degree of Freedom) model of the Huy…

2008 • Planetary and Space Science

Cassini 8

XMM-Newton Observations of NGC 4051: Temporal Flux and Spectral Variability during Transition to the Faintest Phase in NGC 4051

DOI: 10.1093/pasj/60.6.1257 Bibcode: 2008PASJ...60.1257H

Tsuruta, Sachiko; Liebmann, Andrew C.; Kunieda, Hideyo +2 more

We report on the results from temporal and spectral analyses of NGC 4051 observed with XMM-Newton. The X-ray variabilities in the higher-flux states are well explained by the combination of a variable, direct power law and a temporally stable, absorbed component. In low-flux states, however, spectral variations are mainly due to flux changes of th…

2008 • Publications of the Astronomical Society of Japan

XMM-Newton 8

The Venus ground-based image Active Archive: A database of amateur observations of Venus in ultraviolet and infrared light

DOI: 10.1016/j.pss.2008.03.005 Bibcode: 2008P&SS...56.1444B

Barentsen, Geert; Koschny, Detlef

The Venus ground-based image Active Archive is an online database designed to collect ground-based images of Venus in such a way that they are optimally useful for science. The Archive was built to support ESA's Venus Amateur Observing Project, which utilizes the capabilities of advanced amateur astronomers to collect filtered images of Venus in u…

2008 • Planetary and Space Science

VenusExpress 8

Development of thermal sensors and drilling systems for lunar and planetary regoliths

DOI: 10.1016/j.asr.2007.02.088 Bibcode: 2008AdSpR..42..363K

Kaufmann, E.; Kargl, G.; Gao, Yang +2 more

We consider some novel concepts for thermal properties experiments aboard lunar landers or rovers, that may lead to an improved understanding of both the structure of the lunar near surface layers and the lunar thermal history. The new instruments could be developed using the experience and heritage from recently developed systems, like the Rosett…

2008 • Advances in Space Research

Rosetta 8

A Model for the Chromosphere/Wind of 31 Cygni and Its Implications for Single Stars

DOI: 10.1088/0004-6256/136/5/1964 Bibcode: 2008AJ....136.1964E

Eaton, Joel A.

I develop a detailed empirical model for the chromosphere and wind of 31 Cyg based on a previously published analysis of International Ultraviolet Explorer spectra from the 1993 eclipse and on the thermodynamics of how the wind must be driven. I then use this model to interpret observations of single supergiant stars and to assess the evidence tha…

2008 • The Astronomical Journal

IUE 8

First High Solar Phase Angle Observations of Rhea Using Cassini VIMS: Upper Limits on Water Vapor and Geologic Activity

DOI: 10.1086/589745 Bibcode: 2008ApJ...680L..65P

Brown, R. H.; Buratti, B. J.; Nicholson, P. D. +5 more

Using radiances acquired with Cassini's Visual and Infrared Mapping Spectrometer (VIMS), we construct high solar phase angle curves for Saturn's second largest moon, Rhea. Ground-based studies of Rhea and Saturnian icy satellites are focussing on low phase angles; to our knowledge, these are the first solar phase curve data for Rhea on phase angle…

2008 • The Astrophysical Journal

Cassini 8

The 2007 outburst of the X-ray binary XTE J1856+053

DOI: 10.1051/0004-6361:200809875 Bibcode: 2008A&A...489.1239S

Greiner, J.; Sala, G.; Ajello, M. +1 more

Aims: On 28 February 2007 a new outburst of the previously known transient source XTE J1856+053 was detected with RXTE/ASM. We present here the results of an XMM-Newton (0.5-10.0 keV) Target of Opportunity observation performed on 14 March 2007, aimed at constraining the mass of the compact object in this X-ray binary and determining its main prop…

2008 • Astronomy and Astrophysics

XMM-Newton 8

X-ray study of accretion flow in narrow-line Seyfert 1 galaxies

DOI: 10.1016/j.asr.2007.04.015 Bibcode: 2008AdSpR..41..174H

Terashima, Y.; Haba, Y.; Kunieda, H. +1 more

We present the results of a systematic study of narrow-line Seyfert 1 galaxies (NLS1s) observed with XMM-Newton. The 2 12 keV X-ray spectra of NLS1s are well represented by a single power law with a photon index Γ ∼ 2. When this hard power law continuum is extrapolated into the low energy band, we found that all objects in our sample show prominen…

2008 • Advances in Space Research

XMM-Newton 7

XMM-Newton observations across the Cygnus Loop from northeastern rim to southwestern rim

DOI: 10.1016/j.asr.2007.05.015 Bibcode: 2008AdSpR..41..383K

Katsuda, Satoru; Tsunemi, Hiroshi

We have observed the Cygnus Loop from the northeast (NE) to the southwest (SW) with XMM-Newton. We extracted spectra from 3‧-spaced annular regions across the Loop and fitted them either with a one-kT_e-component non-equilibrium ionization (NEI) model or with two-kT_e-component NEI model. We found that the two-kT_e-co…

2008 • Advances in Space Research

XMM-Newton 7