October 2021 - vsnet-campaign-dn - ooruri.kusastro.kyoto-u.ac.jp

[vsnet-campaign-dn 16057] XM78HT: new WZ Sge-type dwarf nova
by Taichi Kato 19 Oct '21

19 Oct '21

XM78HT: new WZ Sge-type dwarf nova Tonny Vanmunster has reported observations on two nights. The object showed early superhumps (double wave) with a period of 0.05404(4) d and an amplitude of 0.055 mag.

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[vsnet-campaign-dn 16056] XM78HT (= AT 2021abog): large-amplitude dwarf nova outburst (mag. 13.5, in Andromeda)
by Patrick Schmeer 19 Oct '21

19 Oct '21

XM78HT = AT 2021abog (UG) https://www.aavso.org/vsx/index.php?view=detail.top&oid=2225109 The current outburst began on 2021 October 15 according to ASAS-SN Sky Patrol (Shappee et al. 2014ApJ...788...48S and Kochanek et al. 2017PASP..129j4502K) data: https://asas-sn.osu.edu/sky-patrol/coordinate/45247e54-7a67-4e39-b69d-21913… https://asas-sn.osu.edu/sky-patrol/coordinate/1520ddd9-d0f1-4592-9cf3-ac961… Time-resolved photometry is encouraged. Clear skies, Patrick

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[vsnet-campaign-dn 16055] ASASSN-21tg: brightened
by Taichi Kato 18 Oct '21

18 Oct '21

ASASSN-21tg: brightened Josch Hambsch has reported further observations. The object brightened again to 15 mag on Oct. 16 and probably reached a peak. A period near 0.0201 d is still detected.

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[vsnet-campaign-dn 16054] ASASSN-21tg: very rapid fading
by Taichi Kato 17 Oct '21

17 Oct '21

ASASSN-21tg: very rapid fading Josch Hambsch reported observations. The object faded from 16.6 to 17.4 between Oct. 14.975 to 15.100. The rapid fading suggests an AM CVn-type object. A period of 0.021(1) d has been detected, but this needs to be confirmed by further observations.

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[vsnet-campaign-dn 16053] Re: ASASSN-14cc
by Taichi Kato 16 Oct '21

16 Oct '21

Re: ASASSN-14cc Subject: [vsnet-outburst 27836] Re: ASASSN-14cc From: Patrick Schmeer via vsnet-outburst <vsnet-outburst(a)ooruri.kusastro.kyoto-u .ac.jp> Please also refer to https://arxiv.org/abs/2106.15104. The superhump period has been confirmed by TESS observations. A change in mass-transfer rate was also suggested.

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[vsnet-campaign-dn 16052] PNV J00444033+4113068: color in quiescence
by Taichi Kato 16 Oct '21

16 Oct '21

PNV J00444033+4113068: color in quiescence 004440.3 +411306 (2000.0) LGGS_J004440.35+411306.9 V=22.278 B-V=0.310 U-B=-0.627 V-R=0.059

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[vsnet-campaign-dn 16051] TCP J01535830+5937545: likely superoutburst of an SU UMa star
by Taichi Kato 15 Oct '21

15 Oct '21

TCP J01535830+5937545: likely superoutburst of an SU UMa star Type from ZTF data. Apparent superoutburst in 2019 Nov. YYYYMMDD(UT) mag observer 20211010.6888 170:C (Masayuki Moriyama) 20211011.8173 163:C (Masayuki Moriyama)

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[vsnet-campaign-dn 16050] Re: PNV J00444033+4113068: updated period of early superhumps
by Taichi Kato 15 Oct '21

15 Oct '21

Re: PNV J00444033+4113068: updated period of early superhumps > Tamas Tordai and Tonny Vanmunster have reported new > observations. Sano-san also reported observations. The result is unchanged.

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[vsnet-campaign-dn 16049] PNV J00444033+4113068: updated period of early superhumps
by Taichi Kato 15 Oct '21

15 Oct '21

PNV J00444033+4113068: updated period of early superhumps Tamas Tordai and Tonny Vanmunster have reported new observations. The best period using these observations is 0.05543(2) d. The double wave profile is very apparent. The deeper minima appear to be partially caused by eclipses. These eclipses will become more apparent when ordinary superhumps appear.

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[vsnet-campaign-dn 16048] ASASSN-21sz: new SU UMa-type dwarf nova
by Taichi Kato 15 Oct '21

15 Oct '21

ASASSN-21sz: new SU UMa-type dwarf nova Josch Hambsch has reported observations. The data showed 0.20 mag superhumps with a period of 0.065(2) d.

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vsnet-campaign-dn October 2021