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[vsnet-symbio 159] Major outburst of LMC V2434 : follow-up
- Date: Fri, 8 Jun 2001 09:50:02 +0900 (JST)
- To: vsnet-alert, vsnet-campaign, vsnet-campaign-xray, vsnet-newvar, vsnet-outburst, vsnet-sss, vsnet-symbio
- From: Taichi Kato <tkato>
- Subject: [vsnet-symbio 159] Major outburst of LMC V2434 : follow-up
- Cc: CBAT@CFA.HARVARD.EDU, GREEN@CFA.HARVARD.EDU, vsnet-j, wliller@compuserve.com
- Sender: owner-vsnet-symbio@kusastro.kyoto-u.ac.jp
Major outburst of LMC V2434 : follow-up
W. Liller has reported the following information. The object has
quickly faded!! If the spectroscopic classification of M3eIII (in GCVS)
is correct, the phenomenon may not be a flare star event, but the
validity of the classification needs to be more closely examined.
If it is an X-ray nova like V4641 Sgr, subsequent events may be expected.
Please keep a close eye on this object.
Date: Thu, 7 Jun 2001 20:36:05 -0400
From: "W.Liller" <wliller@compuserve.com>
Subject: Fizzle
Hola, Howard et al. -
Tonight at UT June 7.9670, 2001, I measured the magnitude of GSC 9166 755
with a broadband V system. I get V(bb) =3D 12.73. The star which I reported
was at magnitude 9.8 last night has returned to its quiescent state !
I've double-checked the pair of films showing the star as bright. The
exposures were 1.5 and 2.5 minute with mid-exposure differing by 4.0
minutes. Without any question, the images are real. On the first,
shorter exposure, the star seems slightly brighter -- perhaps by 0.2 - 0.3
mags -- which suggests to me that GSC is probably a flare star.
Alternatively, it could be an extremely short duration SS Cyg type or a
super-fast nova. It could even be an errant (and nearby) asteroid, rotating
rapidly but not moving so fast that in four minutes it shows motion.
(Focal scale 670"/mm).
Tonight it is too faint for me to obtain a spectrogram. Maybe someone else
can.
All the best to all, Bill Liller
vsnet-adm@kusastro.kyoto-u.ac.jp