Science Archives Publication System

INTEGRAL observations of the peculiar BeX System SAX J2103.5+4545

DOI: 10.1051/0004-6361:20041214 Bibcode: 2004A&A...427..293B

Connell, P.; Reig, P.; Blay, P. +3 more

We present an INTEGRAL data analysis of the X-ray transient SAX J2103.5+4545 during two outbursts detected in December 2002. The INTEGRAL coordinates and error circle agree with the position of the recently proposed optical counterpart. A power-law plus cut-off model provided a good fit to the 4-150 keV spectrum yielding a photo…

2004 • Astronomy and Astrophysics

INTEGRAL 16

High-Resolution Ultraviolet Spectra of the Dwarf Seyfert 1 Galaxy NGC 4395: Evidence for Intrinsic Absorption

DOI: 10.1086/422468 Bibcode: 2004ApJ...612..152C

Filippenko, A. V.; Turner, T. J.; Kraemer, S. B. +5 more

We present ultraviolet spectra of the dwarf Seyfert 1 nucleus of NGC 4395, obtained with the Far Ultraviolet Spectroscopic Explorer (FUSE) and the Hubble Space Telescope Space Telescope Imaging Spectrograph at velocity resolutions of 7-15 km s^-1. We confirm our earlier claim of C IV absorption in low-resolution UV spectra and detect a n…

2004 • The Astrophysical Journal

eHST 16

Short-Duration Active Region Brightenings Observed in the Extreme Ultraviolet and Hα by the Solar and Heliospheric Observatory Coronal Diagnostic Spectrometer and Hida Domeless Solar Telescope

DOI: 10.1086/381089 Bibcode: 2004ApJ...602.1051B

Fludra, A.; Brooks, D. H.; Kurokawa, H. +6 more

We present the first detection of an Hα counterpart to the EUV blinker. The observations come from a coordinated campaign between the Hida Observatory Domeless Solar Telescope (DST) and the Solar and Heliospheric Observatory Coronal Diagnostic Spectrometer (CDS) conducted in 2002 July and August. Utilizing studies designed for high-cadence observa…

2004 • The Astrophysical Journal

SOHO 16

Subaru Deep Spectroscopy of a Star-forming Companion Galaxy of BR 1202-0725 at z=4.7

DOI: 10.1086/425887 Bibcode: 2004AJ....128.2704O

Ohyama, Youichi; Taniguchi, Yoshiaki; Shioya, Yasuhiro

We present deep spatially resolved optical spectroscopy of the northwest companion galaxy of the quasar BR 1202-0725 at z=4.7. Its rest-frame UV spectrum shows star-forming activity in the nuclear region. The Lyα emission profile is symmetric with wavelength, while its line width is unusually wide (FWHM~=1100 km s^-1) for such a high-z s…

2004 • The Astronomical Journal

eHST 16

Solar p-mode frequencies at ℓ=2: What do analyses of unresolved observations actually measure?

DOI: 10.1051/0004-6361:20034465 Bibcode: 2004A&A...416..341C

Chaplin, W. J.; Elsworth, Y.; Appourchaux, T. +4 more

We have studied in detail the extraction of estimates of ℓ=2 p-mode frequencies from unresolved observations of the visible disc of the Sun. Examples of data of this type include ground-based observations made by the Birmingham Solar-Oscillations Network (BiSON), and space-borne observations made by the GOLF and VIRGO/SPM instruments on board the …

2004 • Astronomy and Astrophysics

SOHO 16

Galactic orbits of Planetary Nebulae unveil thin and thick disk populations and cast light on interaction with the interstellar medium

DOI: 10.1051/0004-6361:20041178 Bibcode: 2004A&A...420..207K

Mignani, R. P.; Wicenec, A.; Guglielmetti, F. +2 more

We report reliable proper motion values for the central stars of four Planetary Nebulae (PNe). The proper motions have been compiled from existing optical catalogues i.e. Tycho-2, UCAC2, USNO-B and GSC-II, which are the product of large scale surveys. Results from the different sources have been compared and excellent agreement has been found in a…

2004 • Astronomy and Astrophysics

Hipparcos 16

MgS in detached shells around carbon stars. Mining the mass-loss history

DOI: 10.1051/0004-6361:20031525 Bibcode: 2004A&A...413..981H

Hony, S.; Bouwman, J.

We investigate the dust composition of detached shells around carbon stars, with a focus to understand the origin of the cool magnesium-sulfide (MgS) material around warm carbon stars, which has been detected around several of these objects \citep{2002A&A...390..533H}. We build a radiative transfer model of a carbon star surrounded by an expan…

2004 • Astronomy and Astrophysics

ISO 16

Multi-Wavelength Observations of an Unusual Impulsive Flare Associated with Cme

DOI: 10.1007/s11207-004-5002-2 Bibcode: 2004SoPh..225..325U

Uddin, Wahab; Chandra, Ramesh; Jain, Rajmal +5 more

We present the results of a detailed analysis of multi-wavelength observations of a very impulsive solar flare 1B/M6.7, which occurred on 10 March, 2001 in NOAA AR 9368 (N27 W42). The observations show that the flare is very impulsive with a very hard spectrum in HXR that reveal that non-thermal emission was most dominant. On the other hand, this …

2004 • Solar Physics

SOHO 16

Me 1-1: A PN containing a cool star

DOI: 10.1051/0004-6361:20040195 Bibcode: 2004A&A...422..563S

Liu, X. -W.; Danziger, I. J.; Shen, Z. -X.

We report the detection of a cool stellar component at the center of the planetary nebula (PN) Me 1-1 and present optical spectra of the system. From measurements of nebular emission lines, we have derived electron temperature, density and chemical composition. Heavy elemental abundances deduced from collisionally excited lines (CELs) are compared…

2004 • Astronomy and Astrophysics

IUE 16

308 Polyxo: ISO-SWS spectrum up to 26 micron

DOI: 10.1051/0004-6361:20041638 Bibcode: 2004A&A...427.1081D

Barucci, M. A.; Dotto, E.; Müller, T. G. +2 more

Infrared spectroscopic observations of the asteroid 308 Polyxo have been carried out by the Infrared Space Observatory (ISO) with the Short Wavelength Spectrometer (SWS) in the spectral region between 7 and 26 µm. The Standard Thermal Model and the Thermophysical Model have been applied to the obtained data in order to model the thermal cont…

2004 • Astronomy and Astrophysics

ISO 16