Zobrazeno 1 - 10
of 381
pro vyhledávání: '"Schoenfelder, V."'
Autor:
Weidenspointner, G., Shrader, C. R., Knoedlseder, J., Jean, P., Lonjou, V., Guessoum, N., Diehl, R., Gillard, W., Harris, M. J., Skinner, G. K., von Ballmoos, P., Vedrenne, G., Roques, J. -P., Schanne, S., Sizun, P., Teegarden, B. J., Schoenfelder, V., Winkler, C.
We present a measurement of the sky distribution of positronium (Ps) annihilation continuum emission obtained with the SPI spectrometer on board ESA's INTEGRAL observatory. The only sky region from which significant Ps continuum emission is detected
Externí odkaz:
http://arxiv.org/abs/astro-ph/0601673
Autor:
Diehl, R., Halloin, H., Kretschmer, K., Strong, A. W., Wang, W., Jean, P., Lichti, G. G., Knoedlseder, J., Roques, J. -P., Schanne, S., Schoenfelder, V., von Kienlin, A., Weidenspointner, G., Winkler, C., Wunderer, C.
Publikováno v:
Astron.Astrophys. 449 (2006) 1025-1031
We performed a spectroscopic study of the 1809 keV gamma-ray line from 26Al decay in the Galaxy using the SPI imaging spectrometer with its high-resolution Ge detector camera on the INTEGRAL observatory. We analyzed observations of the first two miss
Externí odkaz:
http://arxiv.org/abs/astro-ph/0512334
Autor:
Strong, A. W., Diehl, R., Halloin, H., Schoenfelder, V., Bouchet, L., Mandrou, P., Lebrun, F., Terrier, R.
Publikováno v:
Astron.Astrophys. 444 (2005) 495
The diffuse continuum emission from the Galactic plane in the energy range 18-1000 keV has been studied using 16 Ms of data from the SPI instrument on INTEGRAL. With such an exposure we can exploit the imaging properties of SPI to achieve a good sepa
Externí odkaz:
http://arxiv.org/abs/astro-ph/0509290
Autor:
Knödlseder, J., Jean, P., Lonjou, V., Weidenspointner, G., Guessoum, N., Gillard, W., Skinner, G., von Ballmoos, P., Vedrenne, G., Roques, J. -P., Schanne, S., Teegarden, B., Schönfelder, V., Winkler, C.
Publikováno v:
Astron.Astrophys.441:513-532,2005
We present a map of 511 keV electron-positron annihilation emission, based on data accumulated with the SPI spectrometer aboard ESA's INTEGRAL gamma-ray observatory, that covers approximately 95% of the celestial sphere. 511 keV line emission is sign
Externí odkaz:
http://arxiv.org/abs/astro-ph/0506026
Autor:
Joinet, A., Jourdain, E., Malzac, J., Roques, J. P., Schoenfelder, V., Ubertini, P., Capitanio, F.
Publikováno v:
Astrophys.J. 629 (2005) 1008-1016
IGR J17464-3213, already known as the HEAO-1 transient source H1743-322, has been detected during a state transition by the SPI/INTEGRAL telescope. We describe the spectral evolution and flaring activity of IGR J17464-3213/H1743-322 from 2003 March 2
Externí odkaz:
http://arxiv.org/abs/astro-ph/0505410
Autor:
Lichti, G. G., Briggs, M., Diehl, R., Fishman, G., Greiner, J., Kippen, R. M., Kouveliotou, C., Meegan, C., Paciesas, W., Preece, R., Schoenfelder, V., von Kienlin, A.
One of the scientific goals of the main instrument of GLAST is the study of Gamma-Ray Bursts (GRBs) in the energy range from ~20 MeV to ~300 GeV. In order to extend the energy measurement towards lower energies a secondary instrument, the GLAST Burst
Externí odkaz:
http://arxiv.org/abs/astro-ph/0407137
Autor:
von Kienlin, A., Attie, D., Schanne, S., Cordier, B., Diehl, R., Iyudin, A. F., Lichti, G. G., Roques, J. -P., Schoenfelder, V., Strong, A.
The gamma-ray source GRO J0852-4642, discovered by COMPTEL, is a possible counterpart of the supernova remnant RX J0852-4622. Detection of radioactive decay from 44Ti nuclei would proof it to be the youngest and nearest supernova remnant known so far
Externí odkaz:
http://arxiv.org/abs/astro-ph/0407129
SPI observations of positron annihilation radiation from the 4th galactic quadrant: sky distribution
Autor:
Weidenspointner, G., Lonjou, V., Knoedlseder, J., Jean, P., Allain, M., von Ballmoos, P., Harris, M. J., Skinner, G. K., Vedrenne, G., Teegarden, B. J., Gehrels, N., Guessoum, N., Schoenfelder, V., Chapuis, C., Durouchoux, Ph., Cisana, E., Valsesia, M.
During its first year in orbit the INTEGRAL observatory performed deep exposures of the Galactic Center region and scanning observations of the Galactic plane. We report on the status of our analysis of the positron annihilation radiation from the 4t
Externí odkaz:
http://arxiv.org/abs/astro-ph/0406178
Autor:
Knödlseder, J., Valsesia, M., Allain, M., Boggs, S., Diehl, R., Jean, P., Kretschmer, K., Roques, J. -P., Schönfelder, V., Vedrenne, G., von Ballmoos, P., Weidenspointner, G., Winkler, C.
We present first results on the observation of 1809 keV gamma-ray line emission from the Cygnus X region with the SPI imaging spectrometer. Our analysis is based on data from the performance verification phase of the INTEGRAL instruments and comprise
Externí odkaz:
http://arxiv.org/abs/astro-ph/0405501
Publikováno v:
Astron.Astrophys. 421 (2004) 983-990
We investigated the MeV properties of 173 unidentified or only tentatively identified EGRET sources listed in the third EGRET catalogue, by analyzing the simultaneously collected COMPTEL MeV data for each individual source. The sources can generally
Externí odkaz:
http://arxiv.org/abs/astro-ph/0405492