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Title: Specke interferometry of SN 1987A and the "Mystery spot"
Authors: Nityananda, R.
Issue Date: 24-Feb-1988
Publisher: Indian Institute of Astrophysics, Bangalore
Citation: Kodaikanal Observatory Bulletin, 1988, Vol.10, p55-58
Abstract: Two groups have independently studied SN1987A by the technique of optical speckle interferometry in the visible region of wavelengths about a month after the explosion . Both detect a secondary source a factor of ten fainter than the primary, at a position angle of 15' and a separation of 60 milliarcseconds , in a 1002 wide band including H alpha . Among the possible explanations suggested for this remarkable source a r e (i) A relativistic jet breaking out from a weak spot in the supernova shell (ii) Relativistic ejection along the axis of rotation during the collapse (iii) Ionisation of a nearby gas cloud by a flash of hard radiation emitted at a very early stage , followed by recombination. The secondary source has now d is appeared leaving us to decide between these two possibilities
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Copyright: 1988 Indian Institute of Astrophysics
Appears in Collections:Research Papers (A&A)

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