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[vsnet-alert 1832] V2323 Sgr outburst
- Date: Thu, 28 May 1998 12:46:58 +0300
- To: skiyota@abr.affrc.go.jp, vsnet-alert@kusastro.kyoto-u.ac.jp
- From: Berto Monard <lagmonar@csir.co.za>
- Subject: [vsnet-alert 1832] V2323 Sgr outburst
- Disclaimer: The CSIR exercises no editorial control over E-mail messages originating in the organisation and the views in this message are therefore not necessarily those of the CSIR and/or its employees.
- Sender: owner-vsnet-alert@kusastro.kyoto-u.ac.jp
Dear Seiichiro (and VS observers),
I am glad to see that at least one other observer had a look at this obscure cv.
Seiichiro, you surely meant 'following up on' in stead of 'according to', which is a totally different context.
I agree that my visual magnitude estimates of V2323 Sgr stated in the alert and subsequent observing reports are not very accurate. With no proper sequences in the region, what do you expect? The primary function of an alert is to...alert and to draw attention to the unusual state of affairs of something.
What I usually do in such cases -and I wrote about it some recent time ago- is to link the observations to a reference star, which I estimated to be 13.0 at the time and actually I still feel it is an acceptable value.
V2323 Sgr has been seen to be much fainter than that star on all observed occasions. Although the actual magnitudes could be numerically lower than the reported ones (13.5-13.7?) , and I think they were, they surely weren't lower than 13.0 visually!
I do not believe that the 11.7 magnitude you obtained is anything near V or v. Unfiltered CCD measures may be close to V for blue stars but in case of red stars, this is not so. But your results could prove what you mentioned ie that V2323 Sgr is a red object in its bright state.
This brings me to the next point: V2323 Sgr is listed as 'ug:' in the cv atlas's. In view of the above we could well be dealing here with another AF Sco
I sincerely hope we can sort it out!
Please respond on the chat-line, I don't want problems with the well appreciated VSNET committee and club members.
Regards,
Berto
>>> Seiichiro Kiyota <skiyota@abr.affrc.go.jp> 05/28/98 04:20AM >>>
Dear dwarf novae observers,
According to Vsnet-alert message by Mr. Monard, I observed V2323 Sgr on May 21 using CCD
without filter.
V2323 Sgr was around 11.7 using nearby comparison (Tycho catalog sequence).
It is much brighter than Monad's observation and V2323 Sgr may have red color.
I used "A Catalog and atlas of cataclysmic variables -1st edition" by Downs and Shara for
identification.
I can not follow up observation due to bad weather.
Any suggestion?
Seiichiro Kiyota
----
Seiichiro Kiyota skiyota@abr.affrc.go.jp
Laboratory of Stress Physiology
Department of Plant Physiology
National Insititute of Agrobiological Resources
Tel:81-298-38-8384
Fax:81-298-38-8347
!
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