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SDSS J024634.11-082536.2: A New Gravitationally Lensed Quasar from the Sloan Digital Sky Survey
Castander, Francisco J.; White, Richard L.; Hall, Patrick B. +14 more
We report the discovery of a new two-image gravitationally lensed quasar, SDSS J024634.11-082536.2 (SDSS J0246-0825). This object was selected as a lensed quasar candidate from the Sloan Digital Sky Survey (SDSS) by the same algorithm that was used to discover other SDSS lensed quasars (e.g., SDSS J0924+0219). Multicolor imaging with the Magellan …
A study of two post-common envelope binary systems
Maxted, P. F. L.; Exter, K. M.; Napiwotzki, R. +2 more
We present intermediate-resolution, phase-resolved spectra of the close-binary systems EC 11575-1845 and V664 Cas, the central star of the planetary nebula HFG 1. Both systems have a very rich emission-line spectrum originating from the face of the cool star, which is irradiated by the hot subdwarf star. The HI emission lines are wide, consistent …
Structure of magnetic fields in NOAA active regions 0486 and 0501 and in the associated interplanetary ejecta
Yurchyshyn, Vasyl; Abramenko, Valentyna; Hu, Qiang
Spectacular burst of solar activity in October-November 2003, when large solar spots and intense solar flares dominated the solar surface for many consecutive days, caused intense geomagnetic storms. In this paper we analyze solar and interplanetary magnetic fields associated with the storms in October-November 2003. We used space- and ground-base…
An X-ray emission-line spectrum of Nova V382Velorum 1999
Schmitt, J. H. M. M.; Ness, J. -U.; Jordan, C. +2 more
We report on the analysis of an X-ray grating spectrum of the Classical Nova V382Vel (1999), obtained with the Low Energy Transmission Grating (LETG)+HRC-S instrument onboard Chandra, which shows emission lines dominating over any continuum. Lines of Si, Mg, Ne, O, N and C are identified, but no Fe lines are detected. The total luminosity in the l…
Heliospheric energetic particle observations during the October-November 2003 events
Livi, S.; Russell, C. T.; Lario, D. +4 more
The intense level of solar activity recorded from 19 October to 12 November 2003 led to unusually high energetic particle intensities observed throughout the heliosphere. The fleet of spacecraft distributed in the inner and outer heliosphere offers us the opportunity to study both the effects of these events in different regions of the heliosphere…
Solar Feature Catalogues In Egso
Zharkova, V. V.; Aboudarham, J.; Zharkov, S. +3 more
The Solar Feature Catalogues (SFCs) are created from digitized solar images using automated pattern recognition techniques developed in the European Grid of Solar Observation (EGSO) project. The techniques were applied for detection of sunspots, active regions and filaments in the automatically standardized full-disk solar images in CaII K1, CaII …
Reconstruction of the reconnection rate from Cluster measurements: First results
Penz, T.; Kubyshkin, I. V.; Nakamura, R. +6 more
A model of transient time-dependent magnetic reconnection is used to describe the behavior of nightside flux transfers (NFTEs) in the Earth's magnetotail. On the basis of the analytical approach to reconnection developed by Heyn and Semenov (1996) and Semenov et al. (2004a) we calculate the magnetic field and plasma bulk velocity time series obser…
The proper motion of the isolated neutron star RX J1605.3+3249
Haberl, F.; Motch, C.; Schwope, A. +3 more
We obtained deep optical imaging of the thermally emitting X-ray bright and radio-quiet isolated neutron star
Helium Line Formation and Abundance in a Solar Active Region
Andretta, V.; Teriaca, L.; Mauas, P. J. D. +3 more
An observing campaign (SOHO JOP 139), coordinated between ground-based and Solar and Heliospheric Observatory (SOHO) instruments, has been planned to obtain simultaneous spectroheliograms of the same active region in several spectral lines. The chromospheric lines Ca II K, Hα, and Na I D, as well as He I 10830, 5876, 584, and He II 304 Å lines hav…
A Small X-Ray Corona of the Narrow-Angle Tail Radio Galaxy NGC 1265 Soaring through the Perseus Cluster
Sun, M.; Jones, C.; Jerius, D.
A deep Chandra observation of NGC 1265 (3C 83.1B), the prototype for the narrow-angle tail (NAT) radio galaxy, reveals a small cool X-ray thermal corona (~0.6 keV) embedded in the hot ICM of the Perseus cluster (~6.7 keV). The corona is asymmetric with a sharp edge (~2.2", or 0.8 kpc from the nucleus) to the south and an extension to the north (at…