Search Publications
Saturn's magnetosphere interaction with Titan for T9 encounter: 3D hybrid modeling and comparison with CAPS observations
Hartle, R. E.; Sittler, E. C.; Cooper, J. F. +2 more
Global dynamics of ionized and neutral gases in the environment of Titan plays an important role in the interaction of Saturn's magnetosphere with Titan. Several hybrid simulations of this problem have already been done (Brecht et al., 2000; Kallio et al., 2004; Modolo et al., 2007a; Simon et al., 2007a, 2007b; Modolo and Chanteur, 2008). Observat…
Modelling the flaring activity of the high-z, hard X-ray-selected blazar IGR J22517+2217
Ghisellini, G.; de Rosa, A.; Ajello, M. +6 more
We present new Suzaku and Fermi data and re-analysed archival hard X-ray data from the INTErnational Gamma-Ray Astrophysics Laboratory (INTEGRAL) and Swift-Burst Alert Telescope (BAT) surveys to investigate the physical properties of the luminous, high-redshift, hard X-ray-selected blazar IGR J22517+2217, through the modelling of its broad-band sp…
Cluster observations of band-limited Pc 1 waves associated with streaming H+ and O+ ions in the high-altitude plasma mantle
Glassmeier, K. -H.; Lavraud, B.; Rème, H. +12 more
Bursts of band-limited Pc 1 waves (0.2 to ∼1.0 Hz) with normalized frequency f/fH+ ∼ 0.5 have been observed by the Cluster spacecraft during many passes through the high-latitude plasma mantle. These transverse, left-hand polarized waves are associated with regions of H+ and O+ ions streaming away from Earth along …
Acoustic Events in the Solar Atmosphere from Hinode/SOT NFI Observations
Roudier, T.; Rieutord, M.; Malherbe, J. -M. +2 more
We investigate the properties of acoustic events (AEs), defined as spatially concentrated and short duration energy flux, in the quiet Sun, using observations of a 2D field of view (FOV) with high spatial and temporal resolution provided by the Solar Optical Telescope (SOT) onboard Hinode. Line profiles of Fe I 557.6 nm were recorded by the Narrow…
Detection of X-Ray Periodicity from a New Eclipsing Polar Candidate XGPS-I J183251-100106
Hui, C. Y.; Lin, L. C. C.; Seo, K. A. +2 more
We report the results from a detailed analysis of an archival XMM-Newton observation of the X-ray source XGPS-I J183251-100106, which has been suggested as a promising magnetic cataclysmic variable (CV) candidate based on its optical properties. A single periodic signal of ~1.5 hr is detected from all EPIC instruments on board XMM-Newton. The phas…
Cloud and Haze in the Winter Polar Region of Titan Observed with Visual and Infrared Mapping Spectrometer on Board Cassini
Le Mouélic, S.; Sotin, C.; Brown, R. H. +1 more
A large cloud in the north polar region of Titan was first observed by the Visual and Infrared Mapping Spectrometer (VIMS) in 2005 and then in 2006. This cloud, confined beyond the latitude 62°N, is surrounded by a mixture of aerosol and mist probably lying in the low stratosphere and troposphere. Subsequent images of this region of Titan show a g…
INTEGRAL constraints on the Galactic hard X-ray background from the Milky Way anticenter
Sunyaev, R.; Krivonos, R.; Tsygankov, S. +3 more
We present results of a study of the Galactic ridge X-ray emission (GRXE) in hard X-rays with the IBIS telescope onboard INTEGRAL in the region near the Galactic anticenter (GA) at l = 155°. We assumed a conservative 2σ upper limit on the flux from the GA in the 25-60 keV energy band of 1.25 × 10-10 erg s-1 cm-2 (1…
Comparison between the ring current energy injection and decay under southward and northward IMF Bz conditions during geomagnetic storms
Zong, Q. G.; Wang, Y. F.; Shi, X. F.
A study of the photometric system of the Kiev network telescope
Andruk, V. M.; Yatsenko, A. I.; Kleshchonok, V. V. +4 more
We performed a series of CCD observations in BVRI bands of a celestial region in cluster M67 (NGC 2682) to study the photometric system of the Kyiv network telescope. The signal recording system consists of a CGE-1400 telescope, Celestron #94175 focal reducer, an automatic turret with a set of UBVRI filters, and a Rolera Mgi CCD camera. The operat…
From a single encapsulated detector to the spectrometer for INTEGRAL satellite: predicting the peak-to-total ratio at high γ-energies
Kshetri, R.
In two recent papers (R. Kshetri, JINST 2012 7 P04008; ibid., P07006), a probabilistic formalism was introduced to predict the response of encapsulated type composite germanium detectors like the SPI (spectrometer for INTEGRAL satellite). Predictions for the peak-to-total and peak-to-background ratios are given at 1.3 MeV for the addback mode of o…