Science Archives Publication System

Discovery of two new satellites of Pluto

DOI: 10.1038/nature04547 Bibcode: 2006Natur.439..943W

Stern, S. A.; Weaver, H. A.; Mutchler, M. J. +6 more

Pluto's first known satellite, Charon, was discovered in 1978. It has a diameter (~1,200km) about half that of Pluto, which makes it larger, relative to its primary, than any other moon in the Solar System. Previous searches for other satellites around Pluto have been unsuccessful, but they were not sensitive to objects <~150km in diameter and …

2006 • Nature

eHST 118

A Long-Period, Violently Variable X-ray Source in a Young Supernova Remnant

DOI: 10.1126/science.1129185 Bibcode: 2006Sci...313..814D

Caraveo, P. A.; Bignami, G. F.; Tiengo, A. +2 more

Observations with the Newton X-ray Multimirror Mission satellite show a strong periodic modulation at 6.67 +/- 0.03 hours of the x-ray source at the center of the 2000-year-old supernova remnant RCW 103. No fast pulsations are visible. If genetically tied to the supernova remnant, the source could either be an x-ray binary, composed of a compact o…

2006 • Science

XMM-Newton 118

A maximum-likelihood method for fitting colour-magnitude diagrams

DOI: 10.1111/j.1365-2966.2006.11099.x Bibcode: 2006MNRAS.373.1251N

Naylor, Tim; Jeffries, R. D.

We present a maximum-likelihood method for fitting two-dimensional model distributions to stellar data in colour-magnitude space. This allows one to include (for example) binary stars in an isochronal population. The method also allows one to derive formal uncertainties for fitted parameters, and assess the likelihood that a good fit has been foun…

2006 • Monthly Notices of the Royal Astronomical Society

Hipparcos 117

Photometric analysis of 1 Ceres and surface mapping from HST observations

DOI: 10.1016/j.icarus.2005.12.012 Bibcode: 2006Icar..182..143L

Parker, Joel Wm.; Stern, S. Alan; Russell, Christopher T. +5 more

The highest resolution (pixel scale 30 km) images of Ceres to date have been acquired by the Advanced Camera for Surveys onboard Hubble Space Telescope, through three wide band filters, centered at 535, 335, and 223 nm, covering more than one rotation of Ceres. The lightcurve at 535 nm agrees with earlier observations at V-band [Tedesco, E.F., Tay…

2006 • Icarus

eHST 116

SPICAM on Mars Express: Observing modes and overview of UV spectrometer data and scientific results

DOI: 10.1029/2006JE002690 Bibcode: 2006JGRE..11110S90B

Montmessin, Franck; Bertaux, Jean-Loup; Perrier, Séverine +13 more

This paper is intended as an introduction to several companion papers describing the results obtained by the SPICAM instrument on board Mars Express orbiter. SPICAM is a lightweight (4.7 kg) UV-IR dual spectrometer dedicated primarily to the study of the atmosphere of Mars. The SPICAM IR spectrometer and its results are described in another compan…

2006 • Journal of Geophysical Research (Planets)

MEx 116

X-ray nature of the LINER nuclear sources

DOI: 10.1051/0004-6361:20054756 Bibcode: 2006A&A...460...45G

Guerrero, M. A.; González-Martín, O.; Márquez, I. +2 more

We report the results from a homogeneous analysis of the X-ray (Chandra ACIS) data available for a sample of 51 LINER galaxies selected from the catalogue by Carrillo et al. (1999, Rev. Mex. Astron. Astrofis., 35, 187) and representative of the population of bright LINER sources. The nuclear X-ray morphology has been classified by their nuclear co…

2006 • Astronomy and Astrophysics

eHST 116

Spitzer 70 and 160 µm Observations of the Extragalactic First Look Survey

DOI: 10.1086/498690 Bibcode: 2006AJ....131..250F

Im, M.; Frayer, D. T.; Surace, J. A. +33 more

We present 70 and 160 µm observations from the Spitzer extragalactic First Look Survey (xFLS). The data reduction techniques and the methods for producing co-added mosaics and source catalogs are discussed. Currently, 26% of the 70 µm sample and 49% of the 160 µm-selected sources have redshifts. The majority of sources with redsh…

2006 • The Astronomical Journal

ISO 116

Detection of the 205 µm [N II] Line from the Carina Nebula

DOI: 10.1086/510289 Bibcode: 2006ApJ...652L.125O

Stark, A. A.; Stacey, G. J.; Oberst, T. E. +7 more

We report the first detection of the 205 µm ³P₁-->3P₀ [N II] line from a ground-based observatory using a direct detection spectrometer. The line was detected from the Carina star formation region using the South Pole Imaging Fabry-Perot Interferometer (SPIFI) on the Antarctic Submillimeter Telescope and R…

2006 • The Astrophysical Journal

ISO 116

On the AU Microscopii debris disk. Density profiles, grain properties, and dust dynamics

DOI: 10.1051/0004-6361:20054250 Bibcode: 2006A&A...455..987A

Augereau, J. -C.; Beust, H.

Context: . AU Mic is a young M-type star surrounded by an edge-on optically thin debris disk that shares many common observational properties with the disk around β Pictoris. In particular, the scattered light surface brightness profile falls off as ∼ r^-5 outside 120 AU for β Pictoris

2006 • Astronomy and Astrophysics

IUE 115

The Signature of ⁴⁴Ti in Cassiopeia A Revealed by IBIS/ISGRI on INTEGRAL

DOI: 10.1086/507300 Bibcode: 2006ApJ...647L..41R

Knödlseder, J.; Decourchelle, A.; Vink, J. +9 more

We report the detection of both the 67.9 and 78.4 keV ⁴⁴Sc γ-ray lines in Cassiopeia A with the INTEGRAL IBIS/ISGRI instrument. Besides the robustness provided by spectroimaging observations, the main improvements compared to previous measurements are a clear separation of the two ⁴⁴Sc lines together with an improved signific…

2006 • The Astrophysical Journal

INTEGRAL 115