Date: Fri, 30 Apr 93 22:37:33 JST From: Hitoshi Yamaoka <g78261a@kyu-cc.cc.kyushu-u.ac.jp> >From kratz@aquila.larc.nasa.gov Fri Apr 30 21:45 JST 1993 Received: from arashi.cc.kyushu-u.ac.jp by kyu-cc.cc.kyushu-u.ac.jp (4.1/6.4J.6) id AA19147; Fri, 30 Apr 93 21:45:55 JST Received: from aquila.larc.nasa.gov by arashi.cc.kyushu-u.ac.jp (5.65+/6.4J.6) id AA09434; Fri, 30 Apr 93 21:46:45 +0900 Return-Path: <kratz@aquila.larc.nasa.gov> Received: by aquila.larc.nasa.gov (4.1/server2.4) id AA10069; Fri, 30 Apr 93 08:44:41 EDT Message-ID: <vsnet-history866@hoge.baba.hajime.jp> Date: Fri, 30 Apr 93 08:44:41 EDT From: David Kratz <kratz@aquila.larc.nasa.gov> To: g78261a@kyu-cc.cc.kyushu-u.ac.jp Status: R Hitoshi: Here are my observations to date on SN1993J. The date marked with an asterisks (*) is the previously unreported estimate. Dave Kratz Date Time (UT) Telescope Eyepiece comparison *'s mag estimate ------------------------------------------------------------------------------ 4/2 1:00 8"/f3.5 TVP 10.5+paracorr c(1)SN(1)e or a(3)SN(1)e 10.6 a = d > b > c > SN > e 4/4 2:00 8"/f3.5 TVP 10.5+paracorr a(4)e(1)SN 10.8 a = d > b > c > e > SN 4/8 0:45 8"/f3.5 TVP 10.5+paracorr SN(1)f(2)h or a(1)e(2)SN 11.5 a > e > SN > f > h 4/13 1:00 8"/f3.5 TVP 10.5+paracorr a(3)SN(1)e 10.6 a = d > b > c > SN > e 4/14 0:45 8"/f3.5 TVP 10.5+paracorr a(3)SN(1)e 10.6 a = d > b > c > SN > e 4/18 0:45 8"/f3.5 TVP 10.5+paracorr a(3)SN(1)e 10.6 a = d > b > c > SN > e 4/19 1:30 8"/f3.5 TVP 10.5+paracorr a(3)SN(1)e 10.6 a = d > b > c > SN > e 4/24 1:30 12.5"f/6 K 24, TVP 13 SN(3)f(1)g or i(1)SN(4)g 11.5 i > SN > f > g 4/28 1:00 8"/f3.5 TVP 10.5+paracorr SN = f 11.8 i > SN = f > g 4/29 1:00 8"/f3.5 TVP 10.5+paracorr f = SN 11.8 i > f = SN > g > h 4/30* 1:00 8"/f3.5 TVP 10.5+paracorr SN = g 11.9 i > f > SN = g > h ------------------------------------------------------------------------------ The 8"/f3.5 in combination with the 10.5 millimeter TeleVue Plossl & the paracorr coma corrector yields 79 power. Observations made from Yorktown, Battlefield, Virginia, USA on 4/2, 4/4, 4/8, 4/13, 4/14, 4/18, 4/19, 4/28, 4/29 & 4/30. The 12.5"f/6 in combination with the 24 millimeter Konig yields 76 power, in combination with the 13 millimeter TeleVue Plossl yields 141 power. Observation made from Ellicott City, Maryland, USA on 4/24. Comparison stars: star mag. position from center of M81 on supernova chart by Thompson & Bryan ------------------------------------------------------------------------------ a) 10.3 11.8' West 0.3' South b) 10.4 3.3' West 7.2' South Richmond star "X" East component c) 10.5 3.7' West 7.2' South Richmond star "X" West component d) 10.3 12.4' East 7.5' South e) 10.7 4.5' West 9.7' North Possibly variable by 0.35 mag??? f) 11.8 4.2' West 2.0' North Richmond star "G" g) 11.9 0.3' East 3.5' South Richmond star "B" h) 12.4 5.5' West 2.1' South Richmond star "D" i) (11.4) 0.7' East 2.4' South Richmond star "A" -----------------------------------------------------------------------------
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