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We report the detection of SN 1988Z in X-rays with the ROSAT High Resolution Imager. The inferred X-ray luminosity of about 1041 erg s−1 can be well explained by assuming that the supernova occurred in a dense circumstellar medium, consistent with optical observations. SN 1988Z is the most distant supernova yet detected in X-rays.
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Fabian et al. (1996) studied this question.
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