July 2022 - vsnet-newvar - ooruri.kusastro.kyoto-u.ac.jp

[vsnet-newvar 9386] Re: Var Ret 2005 likely superoutburst
by Taichi Kato 29 Jul '22

29 Jul '22

> This long outburst began between 2022 July 16 and 21. It was > observed at mag. 13 for five days, followed by a rapid fading > on July 27. The outburst was considerably longer than short > outbursts of this dwarf nova, but shorter than standard UGSU > superoutbursts (~14 days). Might be an EI Psc star, although the peak M_V is not too faint.

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[vsnet-newvar 9385] Var Ret 2005 likely superoutburst
by Patrick Schmeer 29 Jul '22

29 Jul '22

Variable Reticuli 2005 (UGSU:) https://www.aavso.org/vsx/index.php?view=detail.top&oid=161100 Recent ASAS-SN Sky Patrol (Shappee et al. 2014ApJ...788...48S and Kochanek et al. 2017PASP..129j4502K) light curve and data: https://asas-sn.osu.edu/sky-patrol/coordinate/38d59ff4-1572-40ef-a0c5-e280e… This long outburst began between 2022 July 16 and 21. It was observed at mag. 13 for five days, followed by a rapid fading on July 27. The outburst was considerably longer than short outbursts of this dwarf nova, but shorter than standard UGSU superoutbursts (~14 days). Regards, Patrick

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[vsnet-newvar 9384] MASTER OT J001204.00-412337.4: possible WZ Sge star
by Taichi Kato 27 Jul '22

27 Jul '22

MASTER OT J001204.00-412337.4: possible WZ Sge star https://www.wis-tns.org/object/2022pel ASAS-SN data: https://asas-sn.osu.edu/sky-patrol/coordinate/de867b05-f575-4a12-abde-cbb71…

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[vsnet-newvar 9383] TCP J22561804+4109534 rebrightenings
by Taichi Kato 27 Jul '22

27 Jul '22

TCP J22561804+4109534 rebrightenings Tamas Tordai has reported further observations. Five rebrightenings have been recorded up to July 24. The amplitudes, however, are decreasing and frequent small-amplitude rebrightenings resemble those of WZ Sge. This phenomenon is atypical for this orbital period.

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[vsnet-newvar 9382] TCP J22561804+4109534 third rebrightening
by Taichi Kato 22 Jul '22

22 Jul '22

TCP J22561804+4109534 third rebrightening Tamas Tordai and Itoh-san recorded the third rebrightening on July 21.

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[vsnet-newvar 9381] ASASSN-22ak outburst
by Taichi Kato 22 Jul '22

22 Jul '22

ASASSN-22ak outburst YYYYMMDD(UT) mag observer 20220720.558 154 (Rod Stubbings) 20220721.578 154 (Rod Stubbings) This object is: Subject: [vsnet-alert 26518] ASASSN-22ak: 13.2m dwarf nova in Indus

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[vsnet-newvar 9380] TCP J22561804+4109534 second rebrightening
by Taichi Kato 21 Jul '22

21 Jul '22

TCP J22561804+4109534 second rebrightening Tamas Tordai reported the second rebrightening on July 19-20. See [vsnet-alert 26866] It would be worth noting that the period 0.065 d is long for a WZ Sge star. If this is indeed a WZ Sge star, it must be a period bouncer.

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[vsnet-newvar 9379] Re: TCP J22561804+4109534: new WZ Sge-type dwarf nova
by Taichi Kato 06 Jul '22

06 Jul '22

> The superhump profile shows no signs of a double-waved pattern, and I could > not detect early superhumps in my data. Yet, the large outburst amplitude of > ~7.4 mag, and the long time for superhumps to develop (approx. 9 days) make > this a very likely WZ Sge-type dwarf nova. It would be worth noting that the period 0.065 d is long for a WZ Sge star. If this is indeed a WZ Sge star, it must be a period bouncer. Period bouncers tend to have smaller amplitudes of ordinary superhumps and 0.14 mag seems to be a bit large. I would propose to assign the WZ Sge classification after confirmation of a small Pdot and/or rebrightenings.

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[vsnet-newvar 9378] ASASSN-20pv (AM CVn) switching on and off
by Taichi Kato 05 Jul '22

05 Jul '22

ASASSN-20pv (AM CVn) switching on and off Still shows post-superoutburst activity. YYYYMMDD(UT) mag observer 20220621.426 143 (Rod Stubbings) 20220621.458 145 (Rod Stubbings) 20220627.469 154 (Rod Stubbings) 20220628.428 154 (Rod Stubbings) 20220630.399 156 (Rod Stubbings) 20220630.492 154 (Rod Stubbings) 20220702.503 154 (Rod Stubbings) 20220703.449 148 (Rod Stubbings) 20220703.499 145 (Rod Stubbings)

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[vsnet-newvar 9377] Re: ASASSN-14gq likely superoutburst
by Taichi Kato 05 Jul '22

05 Jul '22

Re: ASASSN-14gq likely superoutburst Faded rapidly. YYYYMMDD(UT) mag observer 20220702.491 143 (Rod Stubbings) 20220703.471 155 (Rod Stubbings)

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vsnet-newvar July 2022