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FIRBACK. IV. Towards the nature of the 170 µm source population
Dole, H.; Lagache, G.; Vaccari, M. +5 more
We present a detailed study of the brighter (>4σ detections) sources in the 170 µm FIRBACK northern N1 ISO survey, with the help of complementary data in the optical, radio, and mid-IR domain. For 82% of them, an optical galaxy counterpart is identified, either as the unique source of the IR emission, or as part of a multiple identificati…
Radio Observations of the Hubble Deep Field-South Region. I. Survey Description and Initial Results
Williams, Robert E.; Norris, Ray P.; Hopkins, Andrew M. +8 more
This paper is the first of a series describing the results of the Australia Telescope Hubble Deep Field-South radio survey. The survey was conducted at four wavelengths, 20, 11, 6, and 3 cm, over a 4 year period and achieves an rms sensitivity of about 10 µJy at each wavelength. We describe the observations and data reduction processes and p…
Cluster AgeS Experiment (CASE): Dwarf Novae and a Probable Microlensing Event in the Globular Cluster M22
Pietrukowicz, P.; Thompson, I. B.; Schwarzenberg-Czerny, A. +4 more
We report the identification of a new cataclysmic variable (denoted as CV2) and a probable microlensing event in the field of the globular cluster M22. Two outbursts were observed for CV2. During one of them superhumps with P_sh=0.0887 d were present in the light curve. CV2 has an X-ray counterpart detected by XMM-Newton. A very likely microlensin…
On Three-Dimensional Magnetic Skeleton Elements Due to Discrete Flux Sources
Longcope, D. W.; Beveridge, C.
The magnetic field in the solar corona plays an important role in coronal heating, flaring activity and many other phenomena studied on the Sun. Magnetic topology is frequently used to understand complicated coronal magnetic fields. By calculating the skeleton of a field, it is possible to build up a sophisticated representation of the key element…
Downscattering Due to Wind Outflows in Compact X-Ray Sources: Theory and Interpretation
Titarchuk, Lev; Shrader, Chris
A number of recent lines of evidence point toward the presence of hot, outflowing plasma from the central regions of compact Galactic and extragalactic X-ray sources. In addition, it has long been noted that many of these sources exhibit an ``excess'' continuum component above ~10 keV, usually attributed to Compton reflection from a static medium.…
Thermal and non-thermal effects driven by magnetic reconnections observed in a confined flare
Schmieder, B.; Li, H.; Berlicki, A.
In order to better understand the energy processes occurring during the impulsive phase of solar flares we compare observations with our magnetic model calculations. We study the 1N/M1.9 confined flare of 20 October 2003 observed during a Joint Observation Program (JOP157), and concentrate on the spectral analysis of the Reuven Ramaty High Energy …
Submillimeter Imaging of RCS J022434-0002.5: Intense Activity in a High-Redshift Cluster?
Gladders, M. D.; Ivison, R. J.; Hoekstra, H. +4 more
We present deep 850 µm imaging of the z=0.773 strong lensing galaxy cluster RCS J022434-0002.5 from the Red-Sequence Cluster Survey (RCS). These data are part of a larger submillimeter survey of RCS clusters with SCUBA on the JCMT. We find five objects at 850 µm, all of which are also detected at either 1.4 GHz or 450 µm, or both…
INTEGRAL broadband X-ray spectrum of the intermediate polar V709 Cassiopeiae
Bonnet-Bidaud, J. M.; Falanga, M.; Suleimanov, V.
We present the hard X-ray time-averaged spectrum of the intermediate polar V709 Cas observed with INTEGRAL. We performed the observation using data from the IBIS/ISGRI instrument in the 20-100 keV energy band and from JEM-X at lower energy (5-20 keV). Using different multi-temperature and density X-ray post-shock models we measured an improved pos…
The chemical composition of δ Scuti⋆
Kovtyukh, V.; Soubiran, C.; Kim, Chulhee +4 more
We present chemical abundances in the photosphere of δ Scuti (δ Sct) - a prototype of the class of pulsating variables - determined from the analysis of a spectrum obtained by using the 2-m telescope at the Peak Terskol Observatory and a high-resolution spectrometer with R= 52 000, a signal-to-noise ratio 250 and from International Ultraviolet Exp…
The Proto-Planetary Nebula M1-92 and the Symbiotic Star MWC 560: Two Evolutionary Phases of the Same Type of Object?
Torres-Peimbert, S.; Georgiev, L.; Arrieta, A.
Important similarities between the objects M1-92, a proto-planetary nebula of bipolar morphology, and MWC 560, a symbiotic star with a jet, have been found. A brief review of the previous studies for both objects is presented for the purpose of proposing mechanisms that best explain these similarities, since up to now both objects have been studie…