Early SPI/INTEGRAL measurements of 511 keV line emission fromthe 4th quadrant of the Galaxy
We report the first measurements of the 511 keV line emission from the Galactic Centre (GC) region performed with the spectrometer SPI on the space observatory INTEGRAL (International Gamma-Ray Astrophysics Laboratory). Taking into account the range of spatial distribution models which are consisten...
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| Veröffentlicht in: | Astronomy and astrophysics (Berlin) 2003-09, Vol.407 (3), p.L55-L58 |
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| container_title | Astronomy and astrophysics (Berlin) |
| container_volume | 407 |
| creator | Jean, P. Knödlseder, J. Lonjou, V. Allain, M. Roques, J.-P. Skinner, G. K. Teegarden, B. J. Vedrenne, G. von Ballmoos, P. Cordier, B. Caraveo, P. Diehl, R. Durouchoux, Ph Mandrou, P. Matteson, J. Gehrels, N. Schönfelder, V. Strong, A. W. Ubertini, P. Weidenspointner, G. Winkler, C. |
| description | We report the first measurements of the 511 keV line emission from the Galactic Centre (GC) region performed with the spectrometer SPI on the space observatory INTEGRAL (International Gamma-Ray Astrophysics Laboratory). Taking into account the range of spatial distribution models which are consistent with the data, we derive a flux of $9.9^{+4.7}_{-2.1} \times 10^{-4}$ ph cm-2 s-1 and an intrinsic line width of $2.95^{+0.45}_{-0.51}$ keV (FWHM). The results are consistent with other high-spectroscopy measurements, though the width is found to be at the upper bound of previously reported values. |
| doi_str_mv | 10.1051/0004-6361:20031056 |
| format | Article |
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The results are consistent with other high-spectroscopy measurements, though the width is found to be at the upper bound of previously reported values.</description><subject>Galaxy: center</subject><subject>gamma rays: observations</subject><subject>line: profiles</subject><issn>0004-6361</issn><issn>1432-0746</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2003</creationdate><recordtype>article</recordtype><recordid>eNqVykFKw0AUxvFBFIzVC7h6F4h9L5NMgjuRWCtSrBbdCMMDJ3RsJtGZKTS36Vk8mS1I964-vj8_IS4JrwgLGiNiniqp6DpDlLukjkRCucxSLHN1LJIDOBVnIXzubkaVTMR7zb4d4OVpOp7OFvXk-eYRnOGw9saZLgboGyiIfrYr8wqt7QwYZ0OwfQeN711cGsjjEr7X_OG5i3u-bxNueTOci5OG22Au_nYk0rt6cXuf2hDNRn9569gPmv1Kq1KWha7wTc9pXlSzTOkH-V__C6xSToI</recordid><startdate>200309</startdate><enddate>200309</enddate><creator>Jean, P.</creator><creator>Knödlseder, J.</creator><creator>Lonjou, V.</creator><creator>Allain, M.</creator><creator>Roques, J.-P.</creator><creator>Skinner, G. K.</creator><creator>Teegarden, B. 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J.</au><au>Vedrenne, G.</au><au>von Ballmoos, P.</au><au>Cordier, B.</au><au>Caraveo, P.</au><au>Diehl, R.</au><au>Durouchoux, Ph</au><au>Mandrou, P.</au><au>Matteson, J.</au><au>Gehrels, N.</au><au>Schönfelder, V.</au><au>Strong, A. W.</au><au>Ubertini, P.</au><au>Weidenspointner, G.</au><au>Winkler, C.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Early SPI/INTEGRAL measurements of 511 keV line emission fromthe 4th quadrant of the Galaxy</atitle><jtitle>Astronomy and astrophysics (Berlin)</jtitle><date>2003-09</date><risdate>2003</risdate><volume>407</volume><issue>3</issue><spage>L55</spage><epage>L58</epage><pages>L55-L58</pages><issn>0004-6361</issn><eissn>1432-0746</eissn><abstract>We report the first measurements of the 511 keV line emission from the Galactic Centre (GC) region performed with the spectrometer SPI on the space observatory INTEGRAL (International Gamma-Ray Astrophysics Laboratory). Taking into account the range of spatial distribution models which are consistent with the data, we derive a flux of $9.9^{+4.7}_{-2.1} \times 10^{-4}$ ph cm-2 s-1 and an intrinsic line width of $2.95^{+0.45}_{-0.51}$ keV (FWHM). The results are consistent with other high-spectroscopy measurements, though the width is found to be at the upper bound of previously reported values.</abstract><pub>EDP Sciences</pub><doi>10.1051/0004-6361:20031056</doi></addata></record> |
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| ispartof | Astronomy and astrophysics (Berlin), 2003-09, Vol.407 (3), p.L55-L58 |
| issn | 0004-6361 1432-0746 |
| language | eng |
| recordid | cdi_istex_primary_ark_67375_80W_Q1Q58N26_J |
| source | Bacon EDP Sciences France Licence nationale-ISTEX-PS-Journals-PFISTEX; Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals; EDP Sciences |
| subjects | Galaxy: center gamma rays: observations line: profiles |
| title | Early SPI/INTEGRAL measurements of 511 keV line emission fromthe 4th quadrant of the Galaxy |
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