Search Publications

Correction to ``Small rampart craters in an equatorial region on Mars: Implications for near-surface water or ice''

Jaumann, R.; Neukum, G.; Hauber, E. +2 more

Abstract Available from http://www.agu.org

HST photometry of the binary globular cluster Sersic 13N-S in NGC 5128

Minniti, D.; Funes, J. G.; Villegas, D.

Using Hubble Space Telescope archival images we resolved individual stars in two young globular clusters centered in the giant HII region Sersic 13, on the dust band of NGC 5128. We resolved 5 sources in the southern cluster and 4 sources in the northern one. The high U luminosity of these stars (-9.3 < M_F336W <-7.8) added to the …

Photometry of 20 eclipsing and ellipsoidal binary systems

Shobbrook, R. R.

ERRATUM: In the published paper the phase diagrams of pi Sco and AL Scl were ommitted. The version reproduced in JAD11, 7 is the complete version. A total of almost 2000 V observations of 20 eclipsing and ellipsoidal bright binary stars was collected between 1991 and 2001 for the purpose of determining more recent epoch ephemerides for the light c…

H1517+656: The Birth of a BL Lacertae Object?

Urry, C. Megan; O'Dowd, Matthew; Scarpa, Riccardo +2 more

H1517+656 is an unusual source, even for a BL Lac object. It is one of the most luminous BL Lac objects known, with extreme emission properties at radio, optical, and X-ray frequencies. Furthermore, in our WFPC2 snapshot survey we discovered a series of peculiar arcs describing a 2.4" radius ring surrounding the source. This paper describes follow…

XMM-Newton observation of the low-metallicity galaxy cluster A1674

Hayashida, K.; Katayama, H.; Nishino, Y.

We present the XMM-Newton observation of an X-ray faint cluster of galaxies A1674. Three regions of diffuse X-ray emission (A1674-NE, A1674-Center, and A1674-West) are detected from A1674. We measure the temperature and metal abundance of this diffuse emission. The diffuse X-ray emission from A1674-Center can be characterized by a thermal plasma w…

Exploring the INTEGRAL Sources in Search for New Microquasars

Mirabel, I. F.; Combi, J. A.; Ribó, M.

Here we present a search for new microquasars among the sources detected with the INTEGRAL satellite (IGR sources). We focus on radio emitting IGR sources and report the discovery of two new probable extragalactic sources behind the galactic plane, as well as the detection at higher energies of the ASCA source AX J1639.0-4642, probably a new micro…

Morphological analysis of intermediate redshift galaxies using the HST/ACS GOODS survey

Kembhavi, Ajit K.; Rawat, A.

We have been involved in performing photometry and morpholog- ical analysis of a large, complete sample of galaxies in the intermediate redshift range using the high resolution images obtained by the Great Observatories Origins Deep Survey (GOODS) with the Advanced Camera for Surveys (ACS) on the Hubble Space Telescope (HST). Imaging data is avail…

Rosetta flyby observed from Cape Town

Roberts, Gregory

Ulysses:. Exploring the Heliosphere in Four Dimensions

Marsden, Richard G.

Ulysses is the first spacecraft ever to fly over the poles of the sun. Its primary goal is to explore the heliosphere in four dimensions: three spatial dimensions, and time. An overview of some of the recent results from the mission will be presented. Particular emphasis will be given to the changes occurring in the 3-dimensional heliosphere from …

The Properties of the Absorbing and Line Emitting Material in IGR J16318-4848

Guainazzi, M.; Matt, Giorgio

We analyzed the 2003 Target of Opportunity XMM-Newton observation of IGR J16318-4848, to derive the properties of the matter responsible for the obscuration and for the emission of Fe and Ni lines. The line of sight material has a column density of about 2×10²⁴ cm^-2 but, from the Fe Kα line EW and Compton Shoulder, we argue t…