|
ИСТИНА |
Войти в систему Регистрация |
ФНКЦ РР |
||
Search for 44Ti Gamma-Ray Line Emission from GRO J0852-4642 with INTEGRAL/SPIстатья
Информация о цитировании статьи получена из
Web of Science
Дата последнего поиска статьи во внешних источниках: 27 мая 2015 г.
- Авторы: von Kienlin A., Attié D., Schanne S., Cordier B., Diehl R., Iyudin A.F., Lichti G.G., J-P Roques, Schönfelder V., Strong A.
- Сборник: Proceedings of the 5th INTEGRAL Workshop on the INTEGRAL Universe
- Серия: ESA SP
- Том: 552
- Год издания: 2004
- Первая страница: 87
- Последняя страница: 90
- Аннотация: 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 44 Ti nuclei would proof it to be the youngest and nearest supernova remnant known so far. During the first year of INTEGRAL core program, the Vela region was observed twice in all for more than 2000 ks. Among other nucleosynthesis studies, one of the most important scientific goals of this observation is the detection of 44 Ti gamma-ray lines expected at 68 keV, 78 keV and 1157 keV. For this purpose the INTEGRAL Spectrometer (SPI), with its very high energy resolution thanks to its germanium detector camera is the key instrument, permitting a precise determination of gamma-ray line intensities and profiles. The upper limit for the 78.4 keV 44 Ti gamma-ray line emission derived from the first analysis is 1.1 × 10-4 γ cm-2 s-1 . This value is mainly dominated by systematic uncertainties in the treatment of the instrumental background. By accumulating more observation time in the next years of the mission and by improving the background understanding, a reliable 44 Ti flux for GRO J0852-4642 or an upper limit which constrains the COMPTEL flux can be expected. Key words: gamma rays: observations, nucleosynthesis, Space telescope: SPI/INTEGRAL. --------------------------------------------------------------------------------
- Добавил в систему: Июдин Анатолий Федорович