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I apologize for this wrong fading the reason is a wrong R mg in USNO A2 (13.8 ) for perform Photometrie measure I am using 2 differents softwares Aip4 ( aperture) and Prims aperture and modelisation excuse me again Roland Santallo Southern Stars Observatory IAU # 930 FAAA Tahiti http://vsnet.southernstars-observatory.org ----- Original Message ----- From: "Taichi Kato" <tkato@kusastro.kyoto-u.ac.jp> To: <vsnet-campaign-dn@ooruri.kusastro.kyoto-u.ac.jp>; <vsnet-superoutburst@ooruri.kusastro.kyoto-u.ac.jp> Cc: <vsnet-gcvs@ooruri.kusastro.kyoto-u.ac.jp> Sent: Thursday, July 03, 2003 11:12 PM Subject: [vsnet-superoutburst 2124] NSV09923: no fading + refined superhump period > NSV09923: no fading + refined superhump period > > Dear Colleagues, > > We have received new data from Peter Nelson and Berto Monard. The > quasi-simultaneous observation by Peter Nelson with Roland Santallo did > not confirm the fading. The later observation by Berto Monard has also > confirmed the smooth fading trend. The unusual behavior on Roland Santallo's > data seems to be of software origin (some commonly used software packages > give systematically fainter magnitudes under certain conditions; the > present case just follows the same trend what we have experienced in > other cases (even?) with AIP4WIN -- we are now accumulating the instances > of these "software faults" and the statistics are steadily growing. > If you feel that your results look strange, please try a different > software package). > > Based on the data up to now, we have refined the superhump period to be > 0.08235(2) d. The superhumps are still clearly visible in phase, but with > a slightly reduced amplitude. There is some indication of a beat phenomenon, > which needs to be verified with longer baseline (several days) observations. > > Regards, > Taichi Kato > VSNET Collaboration team >
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