[Message Prev][Message Next][Thread Prev][Thread Next][Message Index][Thread Index]
[vsnet-campaign-news 85] AstroAlert: RS Oph active
****************************************************************
Recurrent nova RS Oph is active
****************************************************************
Mike Simonsen (MI, USA) reports that the recurrent nova RS Oph has
entered an active phase. Since more than 16 years have passed since
the last eruption of RS Oph, please keep a close eye on this object
in order to see whether the present activity may lead to a major event.
The object showed a considerable degree of activity (up to mag 10)
one to a few month before the 1985 eruption. Such a phenomenon may be
a precursor-like activity of a nova explosion.
Recent observations reported to VSNET:
YYYYMMDD(UT) mag observer
20010523.940 118 (G. Comello)
20010523.969 119 (P. A. Dubovsky)
20010523.976 115 (M. Reszelski)
20010524.037 118 (H. McGee)
20010524.064 116 (G. Poyner)
20010524.957 119 (R. J. Bouma)
20010524.973 116 (M. Reszelski)
20010524.983 116 (P. A. Dubovsky)
20010525.944 119 (R. J. Bouma)
20010526.043 117 (P. A. Dubovsky)
20010526.808 118 (A. Pearce)
20010527.899 120 (M. Verdenet)
20010527.941 119 (E. Muyllaert)
20010528.899 118 (M. Verdenet)
20010530.042 115 (G. Poyner)
20010530.219 118 (M. Simonsen)
20010530.955 118 (E. Muyllaert)
20010531.026 115 (M. Reszelski)
20010531.051 118 (H. McGee)
20010602.553 11.87V (S. Kiyota)
20010602.558 13.26B (S. Kiyota)
20010608.062 116 (G. Poyner)
20010608.245 118 (M. Simonsen)
20010608.982 118 (E. Muyllaert)
20010609.216 119 (M. Simonsen)
20010610.140 118 (M. Simonsen)
20010610.910 118 (M. Verdenet)
20010612.983 117 (M. Reszelski)
20010613.915 114 (P. A. Dubovsky)
20010613.976 118 (E. Muyllaert)
20010614.283 118 (M. Simonsen)
20010614.312 119 (R. J. Modic)
20010615.158 121 (E. van Ballegoij)
20010615.865 113 (P. A. Dubovsky)
20010616.010 120 (O. Pejcha)
20010617.269 118 (M. Simonsen)
20010618.233 116 (M. Simonsen)
20010618.972 117 (E. Muyllaert)
20010620.962 117 (M. Reszelski)
20010620.976 117 (G. Poyner)
20010621.910 113 (G. Gyzman)
20010623.991 115 (E. Muyllaert)
20010624.192 121 (E. van Ballegoij)
20010624.251 112 (M. Simonsen)
20010624.281 111 (M. Simonsen)
20010624.288 110 (M. Simonsen)
20010624.294 111 (M. Simonsen)
20010624.313 112 (M. Simonsen)
20010624.319 111 (M. Simonsen)
20010624.355 112 (M. Simonsen)
20010624.364 113: (M. Simonsen)
---
We have been undertaking on photometric campaigns on several super-
outbursting dwarf novae and peculiar variable stars. News and call for
observations on these objects will be issued on our regular weekly
"News from VSNET" bulletins. Those who immediately need information
should make an access to the VSNET website, and click on VSNET campaign
list.
----------------------------------------------------------------------------
VSNET (Variable Star Network) is an international variable star observing
network, covering various areas of novae, supernovae, cataclysmic variables
(CVs), X-ray transients, and other classical eruptive, pulsating, and
eclipsing variables. VSNET is one of invited contributing organizations
to the SkyPub AstroAlert system.
VSNET Home Page: http://vsnet.kusastro.kyoto-u.ac.jp/vsnet/
CCD observations of such targets are a relatively easy task for a 20-40cm
telescope; simply take as many CCD frames (with exposure times 10-30 sec)
as possible, spanning several hours per night. The only requirements are
the weather and your patience! If you need more help on the observing
technique, please feel free to ask on the vsnet-campaign list.
We would sincerely appreciate volunteers who would join the VSNET
Collaboration team to study the wonders of these exotic variable stars.
To join the VSNET campaign collaborative list, send an e-mail to
vsnet-adm@kusastro.kyoto-u.ac.jp (VSNET administrator)
with a line "SUBSCRIBE vsnet-campaign." or your comment to join the
collaboration team.
----------------------------------------------------------------------------
vsnet-adm@kusastro.kyoto-u.ac.jp
Return to Daisaku Nogami
vsnet-adm@kusastro.kyoto-u.ac.jp
VSNET Home Page