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44Ti gamma-ray emission lines from SN1987A reveal an asymmetric explosion

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Science  08 May 2015:
Vol. 348, Issue 6235, pp. 670-671
DOI: 10.1126/science.aaa2259
  • Fig. 1 SN1987A 55- to 80-keV background-subtracted spectrum measured with NuSTAR.

    Data from both telescopes are combined (for presentation only) and shown with 1σ error bars. Both of the 44Ti lines are clearly measured. The vertical green lines are the rest-frame energies of the 44Ti lines (67.87 and 78.32 keV). The redshift is evident in both lines, indicating the asymmetry of the explosion. Also shown is the best-fit model, convolved through the NuSTAR instrument response, for case (1), where the fitting parameters for the two lines are tied together (supplementary materials).

Supplementary Materials

  • 44Ti gamma-ray emission lines from SN1987A reveal an asymmetric explosion

    S. E. Boggs, F. A. Harrison, H. Miyasaka, B. W. Grefenstette, A. Zoglauer, C. L. Fryer, S. P. Reynolds, D. M. Alexander, H. An, D. Barret, F. E. Christensen, W. W. Craig, K. Forster, P. Giommi, C. J. Hailey, A. Hornstrup, T. Kitaguchi, J. E. Koglin, K. K. Madsen, P. H. Mao, K. Mori, M. Perri, M. J. Pivovaroff, S. Puccetti, V. Rana, D. Stern, N. J. Westergaard, W. W. Zhang

    Materials/Methods, Supplementary Text, Tables, Figures, and/or References

    Download Supplement
    • Materials and Methods
    • Figs. S1 to S3
    • Tables S1 and S2
    • References

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