Visual observations, just before a general power failure in Pretoria, saw the following outburst:
V2323 Sgr 980518.869 135 V2323 Sgr 980518.889 135 Previous observation: V2323 Sgr 980516.83 <138
Note: V2323 Sgr is listed as 'ug:' in the recent edition of the CV atlas.
In the hope of confirmation and follow-ups, my best regards,
Berto
(Note V2323 Sgr is bright on GSC).
Light curve
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
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
On the nature of V2323 Sgr (Cieslinski)
Message forwarded by permission of Dr. Cieslinski. V2323 Sgr seems to be a long-period variable.
In the last days I have seen the discussion in the VSNET on the nature of V2323 Sgr. We observed this star in the course of a photometric and spectroscopic program on southern and equatorial irregular variables and suspected cataclysmic variables (article in press in the Astronomy & Astrophysics Suppl. Series). Our spectroscopic observations indicate that V2323 Sgr has a late type spectrum (prominent TiO bands in the optical region) with emission lines of Balmer series (the emission are weak or absent when spectrum become later). The spectrum is not typical of a CV or symbiotic star. Possibly, this star is some type of semiregular variable or a Mira.
Regards, Deonisio Cieslinski Divisao de Astrofisica Instituto Nacional de Pesquisas Espaciais-INPE, Brazil deo@das.inpe.br
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