Science Archives Publication System

INTEGRAL and XMM-Newton observations towards the unidentified MeV source GRO J1411-64

DOI: 10.1051/0004-6361:20065346 Bibcode: 2006A&A...457..257T

Barcons, X.; Reimer, O.; Torres, D. F. +9 more

Aims.We investigate the nature of the COMPTEL unidentified source GRO J1411-64. Methods: The source was observed by INTEGRAL. Its central part was also observed by XMM-Newton. Results: The data analysis shows no hint for new detections at hard X-rays. The upper limits in flux herein presented constrain the energy spectrum of whatever was producing…

2006 • Astronomy and Astrophysics

INTEGRAL XMM-Newton 1

Discovery of a cluster of galaxies behind the Milky Way: X-ray and optical observations

DOI: 10.1051/0004-6361:20065681 Bibcode: 2006A&A...459..415L

Motch, C.; Mendes de Oliveira, C.; Janot-Pacheco, E. +2 more

We report the discovery of Cl 2334+48, a rich cluster of galaxies in the Zone of Avoidance, identified in public images from the XMM-Newton archive. We present the main properties of this cluster using the XMM-Newton X-ray data, along with new optical spectroscopic and photometric observations. Cl 2334+48 is l…

2006 • Astronomy and Astrophysics

XMM-Newton 1

The broad-band spectrum of Cyg X-2 with INTEGRAL

DOI: 10.1051/0004-6361:20053189 Bibcode: 2006A&A...445.1089L

Stella, L.; van der Klis, M.; Lewin, W. H. G. +7 more

We study the broad band (3-100 keV) spectrum of Cygnus X-2 with INTEGRAL. We find that the spectrum is well fitted by a Comptonized component with a seed-photons temperature of ∼ 1 keV, an electron temperature of ∼ 3 keV and an optical depth τ ∼ 8. Assuming spherical geometry, the radius of the seed-photons emitting region is ∼ 17 km. The source s…

2006 • Astronomy and Astrophysics

INTEGRAL 1