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From: Arto.Oksanen@tietoenator.com Subject: =?iso-8859-1?Q?RE=3A_=C4vsnet-campaign-nova_1407=C5_Possible_N?= =?iso-8859-1?Q?ova_in_Scutum=3A_astrometry?= Date: Fri, 12 Sep 2003 17:23:30 +0300 (snipped) For example an image from 2003-09-10T19:11:06 gives following astrometry: 18 49 37.63 -09 33 50.8 (J2000.0) USNOA2.0 reference A very close agreement with your result. My first images were taken through clouds and trees so the astrometry was probably compromized. best regards, arto -- Arto Oksanen mailto:arto.oksanen@jklsirius.fi Jyvaskylan Sirius ry, Kyllikinkatu 1, FIN-40100 Jyv$BgT(Jkyl Finland Tel: +358-40-5659438 Fax: +358-14-4157803 Nyrola Observatory http://vsnet.ursa.fi/sirius/nytt/nytt_info.html -----Original Message----- From: Hitoshi YAMAOKA [mailto:yamaoka@rc.kyushu-u.ac.jp] Sent: 12. syyskuuta 2003 16:43 To: vsnet-campaign-nova@kusastro.kyoto-u.ac.jp; vsnet-chat@kusastro.kyoto-u.ac.jp Cc: dgreen@cfa.harvard.edu Subject: vsnet-campaign-nova 1407 Possible Nova in Scutum: astrometry Subject: Possible Nova in Scutum: precise astrometry Precise astrometry of possible nova in Scutum has been done with CCD images taken by B. Monard (Aug. 30.7 UT) and D. Rodriguez (Aug. 31.0 UT), with respect to the UCAC-2 reference frame (100 stars, mean residual 0".1): R.A. = 18:49:37.600 Decl. = -9:33:50.85 (J2000.0). No source can be seen within 2" of this position on the DSS 2 red image (Epoch = 1984.642) and the 2MASS public images (Epoch = 1999.690). This measurement slightly differs from previously reported values: 18:49:37.62, -9:33:50.3 (S. Wakuda, IAUC 8190) 18:49:37.59, -9:33:50.3 (O. Trondal, vsnet-discovery-nova 239), 18:49:37.65, -9:33:50.1 (A. Oksanen, vsnet-campaign-nova 1390, USNO-A2.0 frame with 0".5 RMS error). It is possibly caused by the difference of the reference catalogue.
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