Return to Home Page
Date: Wed, 14 Apr 93 10:53:48 JST From: Hitoshi Yamaoka <g78261a@kyu-cc.cc.kyushu-u.ac.jp> Subject: visual estimate from Bill Dillon Newsgroups: sci.astro From: wgd@se.houston.geoquest.slb.com (Bill Dillon) Subject: Supernova in M81 (1993J) Keywords: SN1993J Nntp-Posting-Host: brahms.se.houston.geoquest.slb.com Organization: GeoQuest Systems Inc. Houston Date: Tue, 6 Apr 93 23:13:43 GMT For those of you who haven't seen the new supernova in M81, don't wait for a moonless night. It's fading fast! Last night (April 6.26 UT), I estimated its magnitude at 11.7 using the chart provided in AAVSO Alert Notice 169. I've read postings of estimates as high as 10.5, and there was some speculation that it might reach magnitude 8 or 9. Bill __________________________ Schlumberger GeoQuest 5858 Westheimer Suite 800 Houston, TX 77057-5648 --- 8< --- 8< --- 8< --- 8< --- 8< --- >From wgd@se.houston.geoquest.slb.com Tue Apr 13 09:37 JST 1993 Received: from arashi.cc.kyushu-u.ac.jp by kyu-cc.cc.kyushu-u.ac.jp (4.1/6.4J.6) id AA02211; Tue, 13 Apr 93 09:37:41 JST Received: from sirius.houston.geoquest.slb.com by arashi.cc.kyushu-u.ac.jp (5.65+/6.4J.6) id AA05350; Tue, 13 Apr 93 08:06:29 +0900 Return-Path: <wgd@se.houston.geoquest.slb.com> Received: from brahms.se.houston.geoquest.slb.com by houston.geoquest.slb.com with SMTP id AA08060 (5.67a8/IDA-1.5 for g78261a@kyu-cc.cc.kyushu-u.ac.jp); Mon, 12 Apr 1993 18:14:24 -0500 Received: by brahms.se.houston.geoquest.slb.com (4.1/SMI-4.1) id AA00314; Mon, 12 Apr 93 16:53:05 CDT Date: Mon, 12 Apr 93 16:53:05 CDT From: wgd@se.houston.geoquest.slb.com (Bill Dillon) Message-ID: <vsnet-history719@hoge.baba.hajime.jp> To: g78261a@kyu-cc.cc.kyushu-u.ac.jp Subject: Re: Supernova in M81 (1993J) Cc: wgd@se.houston.geoquest.slb.com Status: R Dear Dr. Yamaoka, > Can I add your data to our light curve? Yes, please do. It would be an honor! The telescope I used was a 28 cm schmidt-cassegrain. If you need more information, just ask. Here is another visual observation of mine (this time with a 25.4 cm schmidt- cassegrain telescope): April 11.21, magnitude 10.9. I have made several other visual observations, which I will send you after checking my records. This supernova has brightened continuously since I posted my first observation - interesting behavior! Bonsai! and clear skies, Bill --- 8< --- 8< --- 8< --- 8< --- 8< --- Newsgroups: sci.astro From: wgd@se.houston.geoquest.slb.com (Bill Dillon) Subject: SN 1993J Keywords: Supernova NGC 3031 M81 Nntp-Posting-Host: brahms.se.houston.geoquest.slb.com Organization: GeoQuest Systems Inc. Houston Date: Tue, 13 Apr 93 14:13:10 GMT Here are some recent visual magnitude estimates of SN 1993J: April 9.20: 11.5 April 10.18: 11.3 April 11.21: 10.9 The observations on April 9 and 10 were made with a 28 cm schmidt-cassegrain reflector. The observation on the 11th was made with a 25 cm schmidt- cassegrain. Comparison stars of magnitudes 10.7 and 11.7 (from the Thompson and Bryan Supernova Search Charts supplied by AAVSO Alert Notice 169) were used for the estimates. On the 11th, I made an hour long exposure of the supernova with 25 cm telescope. I was puzzled and *very* disappointed when the film came back absolutely blank. This morning, in the shower, I realized that I failed to put the camera setting on 'B', thus taking a 1/250 second exposure instead of one an hour long. :-( Live and learn! Bill, who wants a CCD. ________________________ Schlumberger GeoQuest | 5858 Westheimer | Suite 800 | Houston, TX 77057-5648 |
Return to the Powerful Daisaku Nogami
vsnet-adm@kusastro.kyoto-u.ac.jp
