Search for an Optical Remnant of the Cassiopeia A Supernova

Details Search for an Optical Remnant of the Cassiopeia A Supernova Search for an Optical Remnant of the Cassiopeia A Supernova

Aug 1969

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1969natur.223..814v&link_type=abstract

Nature, Volume 223, Issue 5208, pp. 814-815 (1969).

Physics

5

Scientific paper

EIGHTEEN plates obtained with the 200 inch (5 m) Hale telescope between 1951 and 1968 have been used to study the motions of the luminous filaments1 associated with the radio source Cas A. The centre of expansion which is found from these motions is given in Table 1. The smaller mean errors of the present determination of the centre of expansion are almost entirely due to the longer time-base which is now available for the determination of the proper motions of individual filaments. Assuming a uniform rate of expansion the explosion which gave rise to Cas A is found to have taken place in AD 1667 +/- 8 (m.e.). The position of the adopted centre of expansion is shown in Fig. 1.

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