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[vsnet-alert 1996] RV: Re: [vsnet 1499] Larry Robinson's SN1998dh image
- Date: Mon, 3 Aug 1998 12:38:15 -0600
- To: <tkato@kusastro.kyoto-u.ac.jp>
- From: "Diego Rodriguez" <drodrig@globalmail.net>
- Subject: [vsnet-alert 1996] RV: Re: [vsnet 1499] Larry Robinson's SN1998dh image
- Cc: "Yamaoka Hitoshi" <yamaoka@rc.kyushu-u.ac.jp>, <vsnet-alert@kusastro.kyoto-u.ac.jp>
- Reply-To: "Diego Rodriguez" <DRODRIG@santandersupernet.com>
- Sender: owner-vsnet-alert@kusastro.kyoto-u.ac.jp
***************************************************
hello All.
I took several images( August 2.99) of Sn1998dh +CCD V filter, mag 14.15
Reference Star GSC 580774 mag 12.9
Diego Rodriguez
Madrid Spain
drodrig@globalmail.net
M1 Group
**********************************
>Dear SN watchers,
>
>Larry Robinson wrote:
>
>> Object Date U.T. R.A. (2000.0) Decl. Mag. Observer
>>SN1998dh 1998 08 02.26876 23 14 37.23 +04 32 19.5 13.2 V Sunflower
>>Observ
>
>This magnitude is quite brighter than other estimates. He wrote he
>have used Astrometrica and USNO-SA as reference stars, but it is
>uncertain which stars are choosed as a photometry reference.
>
>I have seen the image
>(http://ftp.kusastro.kyoto-u.ac.jp/pub/vsnet/SNe/sn1998dh/robinson.jpg)
>which seems to me that SN 1998dh was about 14.0 mag or so, comparing
>with 1306 and 1456 stars (USNO-A1.0).
>
>Is this a problem of reference stars or of a software?
>
>Sincerely Yours,
>Hitoshi Yamaoka, Kyushu Univ., Japan
>yamaoka@rc.kyushu-u.ac.jp
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