We have obtained long-slit echelle observations of eight cataloged supernova remnants (SNRs) in the Magellanic Clouds: N19 in the SMC, and N11L, N49, N63A, N86, N135, N157B, and N206 in the LMC. These SNRS were selected to cover a large range in morphology and interstellar environment. The Hα and [N II] emission-line images provide a homogeneous set of data on the large- scale kinematics of the line-emitting gas in evolved SNRs. The data have been used to simulate integrated velocity profiles in order to estimate the importance of foreground nebular contamination on the emission spectra of SNRs in distant galaxies, and for comparison with the luminous SNR candidates in the giant H II regions in M101. We have also observed five unconfirmed SNR candidates: N66 in the SMC, nonthermal radio sources 0525-66.3 and 0526-66.2, superbubble 0536-692, and N70 in the LMC. We confirm the presence of a SNR within the H II region N66, and rule out SNRs in the nonthermal radio sources 0525-66.3 and 0526-66.2. The nature of 0536-692 and N70 remains ambiguous.
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Chu et al. (1988) studied this question.