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[vsnet-campaign-news 60] AstroAlert: Nova Aql 2001
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Nova in Aquila, Spectroscopically Confirmed
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We have been informed by Mark Kidger that the Isaac Newton Grooup of
Telescopes in La Palma took a spectrum of the possible nova on the
4.2-m William Herschel Telescope, and found that the object had a
spectrum of a classical nova.
Further to note, Kesao Takamizawa reported his prediscovery magnitudes.
The available observations up to now are:
YYYYMMDD(UT) mag observer
20001027.416 <151p (K. Takamizawa)
20001126.800 <128p (Mike Collins)
20001213.367 <131p (K. Takamizawa)
20010216.792 <131p (K. Takamizawa)
20010220.792 <131p (K. Takamizawa)
20010226.792 132p (K. Takamizawa)
20010302.796 <131p (K. Takamizawa)
20010318.719 130p (K. Takamizawa)
20010321.767 127p (K. Takamizawa)
20010326.762 127p (K. Takamizawa)
20010331.738 127p (K. Takamizawa)
20010411.753 131p (K. Takamizawa)
20010418.776 <117p (K. Kanatsu)
20010418.778 <117p (K. Kanatsu)
20010419.691 127p (K. Takamizawa)
20010422.739 <129p (K. Takamizawa)
20010425.100 121:p (Mike Collins)
20010426.676 128p (K. Takamizawa)
20010426.769 <112p (K. Kanatsu)
20010426.772 <112p (K. Kanatsu)
20010511.988 109p (Mike Collins)
20010512.587 108p (K. Takamizawa)
20010513.651 <117p (K. Kanatsu)
20010513.653 <117p (K. Kanatsu)
20010516.633 130p (K. Takamizawa)
20010516.966 126V (N. James)
20010517.790 118C (Ouda team)
The light curve of the nova suggests a long premaximum halt and a sharp
peak, as observed in slow novae V723 Cas (= Nova Cas 1995) and DO Aql.
There may be future additional peaks, as experienced in V723 Cas.
M. Uemura, T. Kato, Kyoto University, and H. Yamaoka, Kyushu University
obtained accurate astrometry of the nova with 15 GSC-ACT stars as follows:
R.A. = 19h07m28s.425, Decl. = +11d44'45".78 (equinox 2000.0, fitting error
0".3). A faint star (likely progenitor) exists on DSS (both generations,
R and Bj) images within 0".5 of the above position. Its magnitude, compared
with USNO_A2.0 stars, is r about 18.7 and b about 19.6.
Congratulations to Mike Collins on his discovery of the nova!
Reference URL on VSNET:
http://vsnet.kusastro.kyoto-u.ac.jp/vsnet/Novae/naql01.html
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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