Search Publications
The INTEGRAL spacecraft - in-orbit performance
Winkler, C.; Clausen, K.; Much, R. +4 more
The INTEGRAL satellite was successfully launched from Baikonur on 17 October, 2002. INTEGRAL is an observatory for gamma-ray astronomy. The goals are to provide unprecedented high resolution imaging capability for unambiguous identification of gamma ray sources and high energy resolution for line spectroscopy. This paper summarises the actual orbi…
The physical structure of high-mass star-forming cores
van der Tak, F. F. S.; Hatchell, J.
We present models of the temperature and density structure of the envelopes of ten deeply embedded massive stars associated with ultracompact HII regions. Constraints come from 60-1300 mum photometry including ISO-LWS spectra, maps at 450 and 850 mum , and CS emission line data. Radial profiles extracted from the maps after removing neighbouring s…
High-energy sources before INTEGRAL. INTEGRAL reference catalog
Mowlavi, N.; Courvoisier, T. J. -L.; Bodaghee, A. +2 more
We describe the INTEGRAL reference catalog which classifies previously known bright X-ray and gamma-ray sources before the launch of INTEGRAL. These sources are, or have been at least once, brighter than ~ 1 mCrab above 3 keV, and are expected to be detected by INTEGRAL. This catalog is being used in the INTEGRAL Quick Look Analysis to discover ne…
Mid-IR spectroscopy of T Tauri stars in Chamealeon I: Evidence for processed dust at the earliest stages
Natta, A.; Meeus, G.; Bouwman, J. +1 more
We present mid-IR spectroscopy of three T Tauri stars in the young Chamealeon I dark cloud obtained with TIMMI2 on the ESO 3.6 m telescope. In these three stars, the silicate emission band at 9.7 mu m is prominent. We model it with a mixture of amorphous olivine grains of different size, crystalline silicates and silica. The fractional mass of the…
GaBoDS: The Garching-Bonn Deep Survey. I. Anatomy of galaxy clusters in the background of NGC 300
Schirmer, M.; Micol, A.; Schneider, P. +5 more
The Garching-Bonn Deep Survey (GaBoDS) is a virtual 12 square degree cosmic shear and cluster lensing survey, conducted with the WFI@2.2 m MPG/ESO telescope at La Silla. It consists of shallow, medium and deep random fields taken in R-band in subarcsecond seeing conditions at high galactic latitude. A substantial amount of the data was taken from …
Disentangling microlensing and differential extinction in the double QSO HE 0512-3329
Lopez, S.; Wisotzki, L.; Wucknitz, O. +1 more
We present the first separate spectra of both components of the small-separation double QSO
Spectroscopic characteristics of polar plumes
Mason, H. E.; Del Zanna, G.; Bromage, B. J. I.
Extreme ultraviolet observations of plumes in polar coronal holes are presented and their spectroscopic signatures discussed. The study focuses on the base of plumes seen on the disk of the Sun with the Coronal Diagnostic Spectrometer (CDS) on the Solar and Heliospheric Observatory (SOHO) satellite. Spectroscopic diagnostic techniques are applied …
The HELLAS2XMM survey. III. Multiwavelength observations of hard X-ray selected sources in the PKS 0312-77 field
Maiolino, R.; Perola, G. C.; Fiore, F. +11 more
We present extensive optical, radio and infrared follow-up observations of a sample of 35 hard X-ray (2-10 keV) selected sources discovered serendipitously in the PV XMM-Newton observation of the radio-loud quasar PKS 0312-77 field, for which also an archival Chandra observation is available. The observations have been carried out as part of the H…
Infrared spectroscopy of faint 15 mu m sources in the Hubble Deep Field South: First hints at the properties of the sources of the IR background
Berta, S.; Aussel, H.; Elbaz, D. +8 more
We present a spectroscopic analysis of a sample of 21 galaxies with z = 0.2-1.5 drawn from a 25 square arcmin ultra-deep ISOCAM survey at lambdaeff =15 mu m centered in the WFPC-2 Hubble Deep Field South. Near-infrared spectra are reported for 18 ISO sources, carried out with ISAAC on the VLT, aimed at detecting the redshifted Halp…
On the structure and kinematics of nebulae around LBVs and LBV candidates in the LMC
Weis, K.
We present a detailed analysis of the morphology and kinematics of nebulae around LBVs and LBV candidates in the Large Magellanic Cloud. HST images and high-resolution Echelle Spectra were used to determine the size, shape, brightness, and expansion velocities of the LBV nebulae around R 127, R 143, and S 61. For S Dor, R 71, R 99, and R 84 we dis…