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XMM-Newton observation of Kepler's supernova remnant
Ballet, J.; Decourchelle, A.; Hughes, J. P. +4 more
We present the first results coming from the observation of Kepler's supernova remnant obtained with the EPIC instruments on board the XMM-Newton satellite. We focus on the images and radial profiles of the emission lines (Si K, Fe L, Fe K) and of the high energy continuum. Chiefly, the Fe L and Si K emission-line images are generally consistent w…
ISAAC/VLT observations of a lensed galaxy at z = 10.0
Kneib, J. -P.; Schaerer, D.; Pelló, R. +2 more
We report the first likely spectroscopic confirmation of a z∼ 10.0 galaxy from our ongoing search for distant galaxies with ISAAC/VLT. Galaxy candidates at z ⪆ 7 are selected from ultra-deep JHKs images in the core of gravitational lensing clusters for which deep optical imaging is also available, including HST data. The object reported here, foun…
Cassini UVIS observations of the Io plasma torus. I. Initial results
Steffl, Andrew J.; Stewart, A. Ian F.; Bagenal, Fran
During the Cassini spacecraft's flyby of Jupiter (October, 2000-March, 2001), the Ultraviolet Imaging Spectrograph (UVIS) produced an extensive dataset consisting of 3349 spectrally dispersed images of the Io plasma torus. Here we present an example of the raw data and representative EUV spectra (561-1181 Å) of the torus, obtained on October 1, 20…
The Off-Nuclear Starbursts in NGC 4038/4039 (The Antennae Galaxies)
Surace, J. A.; Fazio, G. G.; Huang, J. -S. +7 more
Imaging of the Antennae galaxies (NGC 4038/4039) with the Infrared Array Camera (IRAC) aboard the Spitzer Space Telescope reveals large concentrations of star-forming activity away from both nuclei of the two merging galaxies. These images confirm earlier findings based on Infrared Space Observatory (ISO) data with lower angular resolution. The sh…
Solitary waves observed in the auroral zone: the Cluster multi-spacecraft perspective
Gurnett, D. A.; Balogh, A.; Lakhina, G. S. +15 more
We report on recent measurements of solitary waves made by the Wideband Plasma Wave Receiver located on each of the four Cluster spacecraft at 4.5-6.5RE (well above the auroral acceleration region) as they cross field lines that map to the auroral zones. These solitary waves are observed in the Wideband data as isolated bipolar and trip…
The Discovery of an Evolving Dust-scattered X-Ray Halo around GRB 031203
Schartel, N.; Rodríguez-Pascual, P. M.; Santos-Lleó, M. +9 more
We report the first detection of a time-dependent dust-scattered X-ray halo around a gamma-ray burst (GRB). GRB 031203 was observed by XMM-Newton starting 6 hr after the burst. The halo appeared as concentric ringlike structures centered on the GRB location. The radii of these structures increased with time as t1/2, consistent with smal…
Further Multiwavelength Observations of the SSA 22 Lyα-Emitting Blob
Ivison, R. J.; Frayer, D. T.; Scott, D. +4 more
We present new follow-up observations of the submillimeter luminous Lyα-emitting object in the SSA 22 z=3.09 galaxy overdensity, referred to as ``blob 1'' by Steidel and coworkers. In particular, we discuss high-resolution Hubble Space Telescope (HST) optical imaging, Owens Valley Radio Observatory (OVRO) spectral imaging, Keck spectroscopy, Very …
Displacement of X-ray sources from star clusters in starburst galaxies
Zezas, A.; Gallagher, J. S.; Kaaret, P. +3 more
We examine the spatial offsets between X-ray point sources and star clusters in three starburst galaxies. We find that the X-ray sources are preferentially located near the star clusters. Because the star clusters are very good tracers of the star formation activity in the galaxies, this indicates that the X-ray sources are young objects associate…
XMM-Newton and VLT observations of the isolated neutron star 1E 1207.4-5209
Caraveo, P. A.; Bignami, G. F.; Mereghetti, S. +3 more
In August 2002, XMM-Newton devoted two full orbits to the observation of 1E 1207.4-5209, making this isolated neutron star the most deeply scrutinized galactic target of the mission. Thanks to the high throughput of the EPIC instrument, ∼360 000 photons were collected from the source, allowing a very sensitive study of the temporal and spectral be…
The Secrets of the Nearest Starburst Cluster. I. Very Large Telescope/ISAAC Photometry of NGC 3603
Grebel, Eva K.; Brandner, Wolfgang; Stolte, Andrea +2 more
VLT/ISAAC JHKL photometry with subarcsecond resolution of the dense, massive starburst cluster NGC 3603 YC forming the core of the NGC 3603 giant molecular cloud is analyzed to reveal characteristics of the stellar population in unprecedented detail. The color-magnitude plane features a strong pre-main-sequence/main-sequence (PMS/MS) transition re…