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December 2021

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[vsnet-campaign-dn 16163] TU Men possible superoutburst
by Taichi Kato 01 Dec '21

01 Dec '21

TU Men possible superoutburst As pointed out by Rod Stubbings in [vsnet-outburst 28070], TU Men has brightened after a possible precursor followed by a possible dip. This outburst may be a long-sought superoutburst. Although this object is known as an SU UMa star above the period gap, superhumps have only been recorded back to 1980! No true superoutbursts have been recorded since. https://ui.adsabs.harvard.edu/abs/1984A%26A...132..187S/abstract YYYYMMDD(UT) mag observer 20211127.510 165 (Rod Stubbings) 20211128.506 166 (Rod Stubbings) 20211129.487 125 (Rod Stubbings) 20211129.537 128 (Rod Stubbings) 20211129.646 129 (Rod Stubbings) 20211130.466 118 (Rod Stubbings) 20211130.507 118 (Rod Stubbings) As one can see in the above paper dealing with the 1980 superoutburst, the initial phase was not observed and there was a gap in the middle. These observations were made before we have sufficient knowledge about superhump evolution. Southern observers, please turn your telescope to TU Men and perform time-resolved photometry to cover the entire phases of the outburst. Such a chance may be only once in 40 years!

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