[ Previous | Next | ADS ]

Detection of the 847 keV gamma-ray line of radio-active Co56 from the Type Ia Supernova SN2014J in M82 with INTEGRAL.

ATel #5992; E. Churazov (IKI, MPA), R. Sunyaev (IKI, MPA), S. Grebenev (IKI), J. Isern (ICE-CSIC/IEEC), P. Jean (IRAP), J. Knodlseder (IRAP), F. Lebrun (APC-CNRS), M. Renaud (LUPM), E. Bravo (UPC), R. Diehl (MPE), E. Kuulkers (ESAC/ESA), on behalf of a larger collaboration.
on 20 Mar 2014; 21:29 UT
Credential Certification: Eugene Churazov (churazov@gmail.com)

Subjects: X-ray, Gamma Ray, Supernovae

Referred to by ATel #: 6099

The 847 keV line due to the radio-active decay of Co56 from the Type Ia Supernova SN2014J in M82 (CBET #3792) has been detected by INTEGRAL. The observations (public data and proposal 1170002, PI: R. Sunyaev; e.g., ATel #5835) took place between UT March 3rd and March 19th, 2014, corresponding to days ~46-63 after the explosion (assuming that explosion took place on Jan 15th, Zheng et al. 2014, ApJ 783, L24) . The flux in the 820-880 keV band, which is expected to contain the blue-shifted and broadened 847 keV line from the decay of Co56, and possibly a subdominant contribution of the Ni56 line at 812 keV, is 4E-4 +/- 1.3E-4 photons/s/cm^2 (stat.err.), +/- 1E-4 (syst.error). Time variations of the flux and finer structure of the gamma-ray lines are under study. INTEGRAL will continue to observe SN2014J for at least another 5 weeks till the end of April.