Science Archives Publication System

INTEGRAL and RXTE monitoring of GRS 1758-258 in 2003 and 2004. A transition from the dim soft state to the hard state

DOI: 10.1051/0004-6361:20054077 Bibcode: 2006A&A...452..285P

Pottschmidt, K.; Zdziarski, A. A.; Lubiński, P. +3 more

The Galactic Center black hole candidate (BHC) GRS 1758-258 has been observed extensively within INTEGRAL's Galactic Center Deep Exposure (GCDE) program in 2003 and 2004, while also being monitored with RXTE. We present quasi-simultaneous PCA, ISGRI, and SPI spectra from four GCDE observation epochs as well as the evolution of e…

2006 • Astronomy and Astrophysics

INTEGRAL 32

NICMOS2 Hubble Space Telescope Observations of the Embedded Cluster Associated with Mon R2: Constraining the Substellar Initial Mass Function

DOI: 10.1086/508485 Bibcode: 2006AJ....132.2296A

Dougados, C.; Andersen, M.; Meyer, M. R. +2 more

We have analyzed Hubble Space Telescope NICMOS2 F110W-, F160W-, F165M-, and F207M-band images covering the central 1^'×1^' region of the cluster associated with Mon R2 in order to constrain the initial mass function (IMF) down to 20M_J. The flux ratio between the F165M and F160W bands was used to measure the strength …

2006 • The Astronomical Journal

eHST 32

Evolution of the Reverse Shock Emission from SNR 1987A

DOI: 10.1086/503896 Bibcode: 2006ApJ...644..959H

Pun, C. S. J.; Smith, Nathan; Garnavich, Peter +13 more

We present new (2004 July) G750L and G140L Space Telescope Imaging Spectrograph (STIS) data of the Hα and Lyα emission from supernova remnant (SNR) 1987A. With the aid of earlier data, from 1997 October to 2002 October, we track the local evolution of Lyα emission and both the local and global evolution of Hα emission. The most recent observations…

2006 • The Astrophysical Journal

eHST 32

Tracing gas motions in the Centaurus cluster

DOI: 10.1111/j.1365-2966.2006.10218.x Bibcode: 2006MNRAS.368.1369G

Fabian, A. C.; Sanders, J. S.; Morris, R. G. +1 more

We apply the stochastic model of iron transport developed by Rebusco et al. to the Centaurus cluster. Using this model, we find that an effective diffusion coefficient D in the range 2 × 10²⁸-4 × 10²⁸cm²s^-1 can approximately reproduce the observed abundance distribution. Reproducing the flat central prof…

2006 • Monthly Notices of the Royal Astronomical Society

XMM-Newton 32

On the vertical wind shear of Saturn's Equatorial Jet at cloud level

DOI: 10.1016/j.icarus.2005.07.011 Bibcode: 2006Icar..180..161P

Sánchez-Lavega, A.; Pérez-Hoyos, S.

In this work we analyze and compare the vertical cloud structure of Saturn's Equatorial Zone in two different epochs: the first one close to the Voyagers flybys (1979-1981) and the second one in 2004, when the Cassini spacecraft entered its orbit around the planet. Our goal is to retrieve the altitude of cloud features used as zonal wind tracers i…

2006 • Icarus

Cassini eHST 32

Far-Ultraviolet Imaging of the Hubble Deep Field-North: Star Formation in Normal Galaxies at z<1

DOI: 10.1086/505685 Bibcode: 2006AJ....132..853T

Gardner, Jonathan P.; Dickinson, M.; Chary, R. +8 more

We present far-ultraviolet (FUV) imaging of the Hubble Deep Field-North (HDF-N) taken with the Solar Blind Channel of the Advanced Camera for Surveys (ACS SBC) and the FUV MAMA detector of the Space Telescope Imaging Spectrograph onboard the Hubble Space Telescope. The full WFPC2 deep field has been observed at 1600 Å. We detect 134 galaxies and o…

2006 • The Astronomical Journal

eHST 32

Radial velocities of 35495 Hipparcos stars in a common system

DOI: 10.1080/10556790600916780 Bibcode: 2006A&AT...25..145G

Gontcharov, G. A.

The Pulkovo Compilation of Radial Velocities (PCRV) catalogue has been produced to study stellar kinematics in the local spiral arm. The PCRV contains the mean weighted absolute radial velocities of 35495 Hipparcos stars of various spectral types and luminosity classes over the whole celestial sphere mainly within the radius of 500pc from the Sun.…

2006 • Astronomical and Astrophysical Transactions

Hipparcos 32

The ratio of N(C¹⁸O) and A_V in Chamaeleon I and III-B. Using 2MASS and SEST

DOI: 10.1051/0004-6361:20053593 Bibcode: 2006A&A...447..597K

Kainulainen, J.; Harju, J.; Lehtinen, K.

We investigate the relationship between the C¹⁸O column density and the visual extinction in Chamaeleon I and in a part of the Chamaeleon III molecular cloud. The C¹⁸O column densities, N(C¹⁸O), are calculated from J=1{-}0 rotational line data observed with the SEST telescope. …

2006 • Astronomy and Astrophysics

ISO 32

Association of Pi2 pulsations and pulsed reconnection: ground and Cluster observations in the tail lobe at 16 R_E

DOI: 10.5194/angeo-24-3433-2006 Bibcode: 2006AnGeo..24.3433K

Dandouras, I.; Lucek, E.; Hasegawa, H. +8 more

Simultaneous measurements from the Cluster spacecraft and several ground stations (SAMNET, IMAGE, Kakioka, Hermanus) provide evidence for an association of Pi2 pulsations and pulsed reconnection in the magnetotail. On 8 September 2002, substorm-related Pi2 pulsations were recorded with the same waveform (same frequency) in the tail lobe at 16 R

2006 • Annales Geophysicae

Cluster 32

First albedo determination of 2867 Steins, target of the Rosetta mission

DOI: 10.1051/0004-6361:20064913 Bibcode: 2006A&A...449L...9F

Barbieri, C.; Barucci, M. A.; Fornasier, S. +2 more

Aims. We present the first albedo determination of 2867 Steins, the asteroid target of the Rosetta space mission together with 21 Lutetia.Methods.The data were obtained in polarimetric mode at the ESO-VLT telescope with the FORS1 instrument in the V and R filters. Observations were carried out from June to August 2005 covering the phase angle rang…

2006 • Astronomy and Astrophysics

Rosetta 32