Science Archives Publication System

Hard X-ray emission from the SNR G337.2+0.1

DOI: 10.1007/s10509-007-9426-7 Bibcode: 2007Ap&SS.309..395C

Albacete Colombo, Juan F.; Benaglia, Paula; Combi, Jorge A. +1 more

We report hard X-ray emission of the non-thermal supernova remnant G337.2+0.1. The source presents centrally filled and diffuse X-ray emission. A spectral study confirms that the column density of the central part of the object is about N_H∼5.9(±1.5)×10²² cm^‑2 and its X-ray spectrum is well represented by a single p…

2007 • Astrophysics and Space Science

XMM-Newton 2

Chromospherically Active Stars. XXVI. The Double-Lined Late-Type Binary HD 19485 = WZ Arietis

DOI: 10.1086/523631 Bibcode: 2007AJ....134.2079F

Bolton, C. T.; Fekel, Francis C.

We have used spectroscopic observations to determine the orbital elements and some basic properties of the double-lined spectroscopic binary HD 19485 = WZ Ari. The orbital period is 6.247854 days, and the orbit is circular. The G5 V primary and K0 V secondary are chromospherically active. One star or possibly both are synchronously rotating. Based…

2007 • The Astronomical Journal

Hipparcos 2

Optimized data masks for focussed solar tomography: background and artificial diagnostic experiments

DOI: 10.1051/0004-6361:20065467 Bibcode: 2007A&A...468..341H

Thompson, M. J.; Hughes, S. J.; Pijpers, F. P.

Context: The use of solar tomography for detecting subsurface features in the Sun is now well established. It customarily proceeds from an analysis of data on the solar surface given weightings in a predetermined geometric (e.g. centre-annulus) configuration.
Aims: We seek to improve these weightings by developing a scheme for choosing optimal…

2007 • Astronomy and Astrophysics

SOHO 2

Discovery of a New X-Ray Transient Source in the Scutum Region with Suzaku

DOI: 10.1093/pasj/59.sp1.S215 Bibcode: 2007PASJ...59S.215Y

Ishida, Manabu; Kokubun, Motohide; Koyama, Katsuji +7 more

During an observation of the Galactic plane in the Scutum region with the Suzaku satellite, we discovered a new X-ray transient source, designated Suzaku J1844-0404. Compared with previous Chandra observations of the same field, four Chandra X-ray sources exist within the current positional uncertainty of Suzaku J1844-0404. A firm identification i…

2007 • Publications of the Astronomical Society of Japan

Suzaku 2

Variability and evolution in various classes of post-AGB stars

DOI: 10.1002/asna.200710808 Bibcode: 2007AN....328..848S

Jeffery, C. S.; Şahin, T.

We aim to compare properties of early-type post-asymptotic giant-branch (post-AGB) stars, including normal first-time B-type post-AGB stars, and extreme helium stars (EHes). Hipparcos photometry for 12 post-AGB stars and 7 EHe stars has been analyzed; 5 post-AGB stars are clearly variable. The Hipparcos data are not sufficiently sensitive to detec…

2007 • Astronomische Nachrichten

Hipparcos 2

MIMS—A relational database of imagery on Mars

DOI: 10.1016/j.cageo.2006.06.012 Bibcode: 2007CG.....33..318A

Vaz, D.; Alves, E. Ivo

Mars Image Mining System (MIMS) is a relational database of internet links to most of the images which were acquired by missions Mariner 9, Viking 1 and 2, Mars Global Surveyor, Mars Odyssey and Mars Express (a total of 329,240 images on December 15, 2005). Unlike existing online databases, it allows to search for images of several missions simult…

2007 • Computers and Geosciences

MEx 2

INTEGRAL observations of the gamma-ray burst on March 11, 2007

DOI: 10.1134/S1063773707100039 Bibcode: 2007AstL...33..656S

Sunyaev, R. A.; Sazonov, S. Yu.; Molkov, S. V.

On March 11, 2007, the INTEGRAL observation discovered and localized a gamma-ray burst in the sky from which an early infrared afterglow was then detected. We present our timing and spectral analyses of the data from the ISGRI detector of the IBIS telescope. The burst consists of one ∼40-s-long peak during which a fluence of ∼3 × 10^-6 e…

2007 • Astronomy Letters

INTEGRAL 2

Filamentary structures in planetary nebulae

DOI: 10.1007/s10509-007-9414-y Bibcode: 2007Ap&SS.310...65D

Gahm, Gösta F.; Carlqvist, Per; Dahlgren, Hanna

We have studied small-scale, filamentary features in 14 planetary nebulae and found that some structures are recurrent and shaped like the letters V and Y, with the apex or stem pointing toward the central parts of the nebula. Two such filaments containing dust, one in NGC 3132 and one in NGC 7293, were investigated in more detail. The mass and de…

2007 • Astrophysics and Space Science

eHST 2

Low-frequency waves upstream and downstream of the terrestrial bow shock

DOI: 10.1016/j.pss.2006.03.007 Bibcode: 2007P&SS...55..243N

Narita, Yasuhito

This is a Ph.D. thesis abstract.

2007 • Planetary and Space Science

Cluster 2

Hubble Space Telescope Far-Ultraviolet Spectroscopy of the Dwarf Nova VW Hydri in Superoutburst

DOI: 10.1086/513611 Bibcode: 2007PASP..119..251M

Sion, Edward M.; Merritt, Jason; Night, Christopher

We obtained three consecutive Hubble Space Telescope spectroscopic observations of a single superoutburst of the dwarf nova VW Hydri. The spectra cover the beginning, middle, and end of the superoutburst. All of the spectra are dominated by strong absorption lines due to C III (1175 Å), Lyα (1216 Å), N IV (1238 and 1242 Å), S II (1260-1565 Å), S I…

2007 • Publications of the Astronomical Society of the Pacific

eHST 2