München 2009 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 89: Neutrino-Astronomie 2

T 89.2: Vortrag

Dienstag, 10. März 2009, 17:00–17:15, A240

IC40-AMANDA combined for point source searches — •Portello-Roucelle Cécile, Odrowski Sirin, Resconi Elisa, Schulz Olaf, and Sestayo Yolanda — Max-Planck-Institut für Kernphysik Saupfercheckweg 1 69117 Heidelberg

During the season 2008-09, the IceCube neutrino telescope has been acquiring data with half of its final number of strings, in a 40 strings configuration (IC40). The AMANDA detector, its predecessor, is still taking data up to spring 2009. AMANDA is actually embedded within the IceCube instrumented volume and has been fully integrated in the data acquisition system. Joint IceCube-AMANDA events have been recorded for 2 years. The full analysis of the first year of integration when IceCube comprised only 22 strings has already shown an increased sensitivity at low energies (between 100GeV and 10TeV) for point source searches with combined IceCube-AMANDA compared to the IceCube only searches. This energy range is of great interest, in particular for the observation of galactic objects. Recent observations in TeV gamma-ray astronomy indeed show that the energy spectrum of these sources can have a cut-off at 10TeV of lower. This is also a major improvement in the search for sources whose energies show a very steep spectral index (steeper than 2). With the same physics motivations, we present here the progress of the analysis for the second year of integration of AMANDA in IceCube, with the combined IC40-AMANDA events.