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[vsnet-campaign 965] Major outburst of LMC V2434



Major outburst of LMC V2434

   W. Liller has reported the following major outburst of LMC V2434,
a M2eIII star, which is also known as a supersoft X-ray source,
2E IPC5843-5.  The object is also detected by ROSAT many times.

   The present outburst may be some kind of a major outburst of a
supersoft X-ray source, or a some kind of nova explosion, or symbiotic
outburst?  X-ray outburst?  Follow-up observation at all wavelengths
are very strongly and urgently requested.

   The object is identified with:

GSC9166.775 052401.63 -710935.5 (2000.0) 12.61 6
USNO0150.03033259 052401.638 -710936.05 (2000.0) 11.0 13.4
2MASS 052401.570 -710934.56 (2000.0)  8.888  8.258  7.956
052401.5 -710937 (2000.0) LMCV2434 SR: 12.90 - - - - M2eIII B72
052401.3 -710922 (2000.0) 2E_IPC5843-5 ultrasoft-X 
052356.1 -710940 (2000.0) 1WGAJ0523.9-7109 0.1660 2.40 0.96 1.17 0.36 obs=1993.171
052354.3 -710955 (2000.0) 1RXPJ052354-7109.9 0.3730 -0.03 -0.31
052356.4 -711010 (2000.0) 2RXP_J052356.4-711011 0.1571P -0.12 -0.12 900620
052359.1 -711003 (2000.0) 2RXP_J052359.2-711004 0.1638P -0.20 -0.07 930620
052359.8 -711004 (2000.0) 1RXPJ052359-7110.0 0.1630 -0.20 -0.04
052402.5 -710955 (2000.0) 1RXS_J052402.6-710956 0.328 -0.12 0.25
052404.9 -711009 (2000.0) 1WGAJ0524.0-7110 0.0883 2.67 0.67 1.55 0.24 obs=1993.097
052404.8 -711017 (2000.0) 2RXP_J052404.8-711018 0.1134P -0.25 -0.11 930407
052406.3 -711023 (2000.0) 1RXPJ052406-7110.4 0.1120 -0.25 -0.17

   Liller's original message:

Date: Thu, 7 Jun 2001 14:45:28 -0400
From: "W.Liller" <wliller@compuserve.com>
Subject: LMC dwarf nova?

Dear Howard Bond et al.

On a pair of Kodak Tech Pan 25 films taken through an orange filter
(Wratten 22) with a 20cm f1/5 Schmidt camera at UT June 6.9566 and June
6.9594, 2001, the star GSC 7166 755, normally near magnitude 12.6, appeared
at magnitude 9.8.  On May 31.959, the star was at or very near its
quiescent brightness.  The star's GSC position (2000): R.A. = 5h 24m 01.6s,
 Dec. = -71d 09' 35.6".

Tonight looks hopeful and I will try my best to get a low dispersion CCD
spectrogram. Any info from Southern Hemisphere observers would be very,
very welcome.

All the best to all,   Bill Liller

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