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The galaxy in which the supernova appeared is an open barred spiral of integrated photographic apparent magnitude m pg =15.4 (see Plate I). With the indicative absolute distance of 29.90 million parsecs, as derived below, the indicative 3 photographic absolute magnitude of the galaxy thus is M^(galaxy) = -17.0 (1) The apparent dimensions of the galaxy in seconds of arc are d ± = 83'.'4 , d 2 = lO'.'O . The indicative absolute dimensions normal to the line of sight are therefore Z)i = 12,100doi:10.1086/127753 fatcat:2dahsqairjecjejeyz46mqoic4