August 2022 - vsnet-campaign-dn - ooruri.kusastro.kyoto-u.ac.jp

[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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[vsnet-campaign-dn 16479] MASTER OT J001204.00-412337.4: new SU UMa-type dwarf nova
by Taichi Kato 01 Aug '22

01 Aug '22

MASTER OT J001204.00-412337.4: new SU UMa-type dwarf nova Josch Hambsch has reported observations on three nights. The object was faint (17 mag) on July 29 and was rising rapidly on July 30 (with superhumps). Superhumps were apparent on July 31 at mag 14.9. The period is about 0.063 d.

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