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[vsnet-campaign-news 70] AstroAlert: HadV89 : new eruptive variable or a possible nova?
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New Eruptive Variable or A Posiible Nova?
Katsumi Haseda has discovered a new variable star
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HadV89 : new eruptive variable or a possible nova?
Katsumi Haseda (Aichi, Japan) reports the discovery of a new variable
star. The star is bright now. No IRAS counterpart is found. No apparent
red star nor bright star is found on DSS. The star may be some sort
of an eruptive variable, or even a nova. Follow-up observations, including
astrometry, multicolor photometry and spectroscopy are strongly encouraged.
Please report your observations to VSNET!
HadV89 = 181526.7 -185708 (J2000.0) semi-accurate astrometry by Haseda.
object YYYYMMDD(UT) mag code
HadV89 19970309.813 <134p Had.VSOLJ
HadV89 19970416.783 <134p Had.VSOLJ
HadV89 19970509.717 <134p Had.VSOLJ
HadV89 19970517.724 <134p Had.VSOLJ
HadV89 19970606.665 <134p Had.VSOLJ
HadV89 19971019.431 <134p Had.VSOLJ
HadV89 19980228.825 <134p Had.VSOLJ
HadV89 19980302.825 <134p Had.VSOLJ
HadV89 19980307.799 <134p Had.VSOLJ
HadV89 19980328.811 <129p Had.VSOLJ
HadV89 19980402.798 <134p Had.VSOLJ
HadV89 19980425.712 <134p Had.VSOLJ
HadV89 19980429.715 <134p Had.VSOLJ
HadV89 19980522.681 <134p Had.VSOLJ
HadV89 19990219.832 <134p Had.VSOLJ
HadV89 19990517.749 <123p Had.VSOLJ
HadV89 20000206.660 <125p Had.VSOLJ
HadV89 20000212.836 <134p Had.VSOLJ
HadV89 20000226.830 <134p Had.VSOLJ
HadV89 20000305.802 <125p Had.VSOLJ
HadV89 20000428.736 <125p Had.VSOLJ
HadV89 20000601.608 125p Had.VSOLJ
HadV89 20000802.511 <123p Had.VSOLJ
HadV89 20000822.507 <134p Had.VSOLJ
HadV89 20010331.795 <134p Had.VSOLJ
HadV89 20010517.643 115p Had.VSOLJ
HadV89 20010528.622 110p Had.VSOLJ
Observer's code:
Had: K. Haseda (Toyohashi, Aichi, Japan)
10cm F4.0 twin patrol camera + T-Max400(120)
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.
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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.
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