Date: Sat, 17 APR 93 11:46 N From: BARBON%ASTRAS.CINECA.IT@jpnkyoto.kyoto-u.ac.jp Subject: sn19993j photometry list Dear Dr. Kato : I wish to congratulate you for your initiative to keep updated the photometry of SN1993J. It will be a valuable piece of work of great importance for all SN observers. In order to help in working with your list I suggest you numbering your updated lists and mark , i.e. by an asterisk, all previous data which have been revised or added later on. This will help in correcting data in old files and introducing new ones. We did the same in the revised version of our Asiago Supernova Catalogue. Thank you again for your work, Best regards, R.Barbon Asiago Astrophysical Observatory ITALY

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