SPI/INTEGRAL observation of 1809 keV gamma-ray line emission from the Cygnus X region

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dc.creatorKnödlseder, J.
dc.creatorValsesia, M.
dc.creatorAllain, M.
dc.creatorBoggs, S.
dc.creatorDiehl, R.
dc.creatorJean, P.
dc.creatorKretschmer, K.
dc.creatorRoques, J. -P.
dc.creatorSchönfelder, V.
dc.creatorVedrenne, G.
dc.creatorvon Ballmoos, P.
dc.creatorWeidenspointner, G.
dc.creatorWinkler, C.
dc.date2004-05-25
dc.date.accessioned2026-07-07T02:13:17Z
dc.date.available2026-07-07T02:13:17Z
dc.descriptionWe 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 comprises 1.3 Ms of exposure time. We observe a 1809 keV line flux of (7.3 +/- 0.9) x 10-5 ph cm-2 s-1 from a region delimited by galactic longitudes 73-93 deg and |b| < 7 deg at a significance level of 8 sigma. The 1809 keV line appears moderately broadened, with an intrinsic FWHM of 3.3 +/- 1.3 keV. Although this broadening is only marginal (at the 2 sigma level our data are compatible with an unbroadened line), it could reflect the 26Al ejecta kinematics.
dc.description5 pages, 5 figures, accepted for publication in the proceedings of the 5th INTEGRAL workshop (held in Munich, 2004)
dc.identifierhttps://arxiv.org/abs/astro-ph/0405501
dc.identifierhttp://arxiv.org/abs/astro-ph/0405501
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/7764
dc.subjectAstrophysics
dc.titleSPI/INTEGRAL observation of 1809 keV gamma-ray line emission from the Cygnus X region
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