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

[vsnet-campaign-dn 16493] ASASSN-22jz: new WZ Sge-type dwarf nova
by Taichi Kato 12 Aug '22

12 Aug '22

ASASSN-22jz: new WZ Sge-type dwarf nova Berto Monard has reported observations on two nights. The object was fading rather rapidly (0.3 mag/d), probably in viscous fading phase. Although there were much irregularity, I could detect a period of 0.05404(4) d (double wave, 0.035 mag). Although the profile is not very typical for early superhumps, the period appears to be real based on the appearance of one-day aliases. The rather unusual profile of early superhumps a result of their low amplitude and overlapping irregularity. Considering the outburst amplitude and peak M_V, this object can be identified to be a WZ Sge star.

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[vsnet-campaign-dn 16492] MASTER OT J001204.00-412337.4: strange behavior
by Taichi Kato 10 Aug '22

10 Aug '22

MASTER OT J001204.00-412337.4: strange behavior Josch Hambsch has reported new observations. The object started fading rapidly on Aug. 8. The duration of the superoutburst (8 d) is too short for a WZ Sge star. Observations of subsequent behavior are very important (the object still shows superhumps).

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[vsnet-campaign-dn 16491] ASASSN-22jz: bright dwarf nova outburst (mag. 9.7) in Hydra
by Patrick Schmeer 08 Aug '22

08 Aug '22

ASASSN-22jz = AT 2022qwf (UG:) (submitted to VSX) Discovery circumstances: https://www.wis-tns.org/object/2022qwf Complete 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/6863cfab-4837-4bdd-bffb-552ee… ASASSN-22jz 20220805.9828 <16.47g ASN ASASSN-22jz 20220808.0109 10.22g ASN ASASSN-22jz 20220808.0121 9.74g ASN ASASSN-22jz 20220808.0133 9.77g ASN A DASCH search revealed a previous (super?)outburst recorded on Harvard plates: 1920 April 14.205 UT, mpg. 10.92 1920 April 14.250 UT, mpg. 11.01 1920 April 22.085 UT, mpg. 11.83 1920 April 22.216 UT, mpg. 11.33 ASASSN-22jz looks like a WZ Sge-type dwarf nova outburst (amplitude 9 magnitudes) at a distance of ~230 pc. Time-resolved photometry is urgently required. Clear skies, Patrick

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[vsnet-campaign-dn 16485] ASASSN-19oc
by Taichi Kato 04 Aug '22

04 Aug '22

ASASSN-19oc Noise? WZ Sge star with a dip in the early stage of the superoutburst. YYYYMMDD(UT) mag observer 20220726.5640 <162c (Yutaka Maeda) 20220802.5037 128:c (Yutaka Maeda)

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[vsnet-campaign-dn 16483] Please check XY Psc
by Taichi Kato 04 Aug '22

04 Aug '22

Please check XY Psc This requires confirmation. YYYYMMDD(UT) mag observer 20220726.7957 <160c (Yutaka Maeda) 20220802.7712 152:c (Yutaka Maeda)

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[vsnet-campaign-dn 16487] KK Tel superoutburst
by Taichi Kato 04 Aug '22

04 Aug '22

KK Tel superoutburst (From supercycle) YYYYMMDD(UT) mag observer 20220518.3515 <164C (Masao Funada) 20220612.2711 <164C (Masao Funada) 20220720.2534 <164C (Masao Funada) 20220803.426 136 (Rod Stubbings)

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[vsnet-campaign-dn 16486] ASASSN-13ce
by Taichi Kato 04 Aug '22

04 Aug '22

ASASSN-13ce SU UMa star. YYYYMMDD(UT) mag observer 20220726.8095 <161c (Yutaka Maeda) 20220802.7828 145:cG (Yutaka Maeda)

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[vsnet-campaign-dn 16484] SY Cap superoutburst
by Taichi Kato 04 Aug '22

04 Aug '22

SY Cap superoutburst YYYYMMDD(UT) mag observer 20220721.8118 <158C (Masayuki Moriyama) 20220722.7656 <171C (Masayuki Moriyama) 20220725.7520 <172C (Masayuki Moriyama) 20220726.5735 <158c (Yutaka Maeda) 20220728.7723 173:C (Masayuki Moriyama) 20220802.5132 131cG (Yutaka Maeda) 20220802.5132 131cG (Yutaka Maeda) 20220803.421 128 (Rod Stubbings)

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[vsnet-campaign-dn 16482] MASTER OT J001204.00-412337.4: superhump period
by Taichi Kato 04 Aug '22

04 Aug '22

MASTER OT J001204.00-412337.4: superhump period Josch Hambsch and Berto Monard have reported new observations. The current superhump period is 0.06105(6) d (probably still stage A). The low amplitude (0.08 mag) is consistent with a period bouncer. Single-night observation by Berto Monard during the initial plateau did not show a strong signature of early superhumps (but had some hint). Early superhumps had probably already decayed at the time of Monard's observation.

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[vsnet-campaign-dn 16481] Re: MASTER OT J001204.00-412337.4: new SU UMa-type dwarf nova
by Taichi Kato 02 Aug '22

02 Aug '22

Re: MASTER OT J001204.00-412337.4: new SU UMa-type dwarf nova > According to ASAS-SN Sky Patrol (Shappee et al. 2014ApJ...788...48S and > Kochanek et al. 2017PASP..129j4502K) data the current superoutburst started > on (or shortly before) 2022 July 16. A dip was recorded (also by > Josch Hambsch, HMB) from July 28 to 30: Then looks likely a period-bouncer WZ Sge star. ASASSN-16hg: https://ui.adsabs.harvard.edu/abs/2018PASJ...70...47K/abstract ASASSN-15jd: https://ui.adsabs.harvard.edu/abs/2016PASJ...68...55K/abstract

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