Astronomy and Astrophysics – Astrophysics
Scientific paper
Oct 1977
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977a%26a....61...93g&link_type=abstract
Astronomy and Astrophysics, vol. 61, no. 1, Oct. 1977, p. 93-98. Research supported by the Nederlandse Organisatie voor Zuiver-
Astronomy and Astrophysics
Astrophysics
9
Astronomical Maps, High Resolution, Pulsars, Supernova Remnants, Astronomical Catalogs, Astronomical Models, Contours, Point Sources, Radio Telescopes
Scientific paper
The shell source G55.7+3.4 has been mapped at 610 MHz with a resolution of 57 by 156 arcsec and at 1415 MHz with a resolution of 27 by 72 arcsec. The spectral-index distribution is determined by comparing maps obtained at wavelengths of 49, 21, and 11 cm. A shell model is fitted to the observations. Noting that the pulsar PSR 1919+21 is contained within the source and that the association between this pulsar and the shell source is still unproved, it is suggested that the shell source may well be an old supernova remnant that has no physical connection to the pulsar. Thirty-seven point sources in the vicinity of G55.7+3.4 are cataloged, including the pulsars PSR 1919+21 and PSR 1920+21.
Goss William Miller
Schwartz U. J.
Siddesh S. G.
Weiler Kurt W.
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