Return to Home Page
CBA Pretoria was under cloud cover for the night 5-6 August, but the sky cleared just in time for V4641 Sgr observations on the next night 6-7 August.
The preliminary light curve looks promising.. I'll send the data soon..
Berto Monard
Bronberg Observatory / CBA Pretoria
>>> Makoto Uemura <uemura@kusastro.kyoto-u.ac.jp> 08/07/03 07:31AM >>>
V4641 Sgr short-term variations
We performed CCD time-series observation for 4 hours last night
at the Ouda observatory with a 60-cm telescope.
Our B-band observation was done with an exposure time of 2 sec
yielding a time resolution of 4 sec.
The light curve shows 100-sec time-scale variations
with amplitudes of 0.05-0.10 mag. A relatively large hump was also
seen around August 6.62 UT (amplitude ~ 0.2mag).
The light curve is similar to that we observed on 2002 May 24,
around the maximum of the last active state.
There is a sign of further shorter time-scale variations.
More detailed analysis is now ongoing.
We will continue observation at Ouda tonight if we have clear sky.
Regards,
Makoto Uemura
--
This message has been scanned for viruses and
dangerous content by MailScanner, and is
believed to be clean.
Mailscanner thanks transtec Computers for their support.
Return to the Powerful Daisaku Nogami
vsnet-adm@kusastro.kyoto-u.ac.jp
