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Old 21-July-2003, 08:15 PM
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nebularain nebularain is offline
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Default Possible nova discovered

I'm new to the Sky & Telescope Astro Alert, and I just received notice of a possible nova discovered in the constellation Ophiucus.

More information can be found here.

But here is part of the write-up:
Quote:
A. Takao reported the detection of a likely new object on his two
unfiltered CCD images taken on July 10 (11.4C mag) and 16 (11.2C
mag). According to ASAS-3 public data, this object was recorded to
brighten on June 15. After maintaining magnitudes of V=11.0-11.5,
the object apparently reached a maximum of V=10.6 on June 26
(vsnet-campaign-nova 1327, 1324). V. Tabur reported that it can be
detected on images after 2003 March (vsnet-campaign-nova 1325),
which implies that it is a slow nova (vsnet-campaign-nova 1326).
G. Bolt performed time-series photometry, which showed 0.1-mag slow
modulations (vsnet-campaign-nova 1335). W. Liller performed
spectroscopy on July 18, and reported the presence of strong H_alpha
emission, which means that it is a genuine nova (vsnet-campaign-nova
1345). C. Buil also reported a strong H_alpha emission in the
spectrum taken on July 19 (vsnet-campaign-nova 1346, 1348). The
object is still bright (vsnet-campaign-nova 1341, 1349, 1328, 1334,
1329, 1330, 1331, 1333, 1336, 1338, 1340, 1343, 1342, 1344, 1347).
(I, of course, have no idea what all the technical jargon and numbers mean. )
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Old 21-July-2003, 08:39 PM
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I think most of the numbers refer to relevant messages in the maillist.
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Old 23-July-2003, 10:57 AM
beskeptical beskeptical is offline
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Supernovae occur about every 100 years per galaxy. I don't know how often novae occur but I presume it would be more often. Anyway, we should start hearing about new ones quite often as the observation equipment is multiplying. I hope they point Hubble at it soon and give us a look.
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Old 23-July-2003, 01:25 PM
glen chapman glen chapman is offline
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Nova detection wont improve all that much. It is all about location location. Novas are not that bright, so need to be fairly close to be detected.

Organisations such as the AAVSO have run Nova patrols for years. Only a gut feeling but suspect they average about 1 a week

The most recent naked eye one was Beta Scorpio's outburst last year.

Vsnet is a very active on-line version of the AAVSO - Have a feeling Mr Takao is a professional based in Japan.

CCD stands for Charged Coupling Device. A type of photographic equipment used in astronomy.

The V before a lot of the numbers is for visual
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