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

[vsnet-newvar 9105] ASASSN-21mh: SU UMa star
by Taichi Kato 14 Mar '22

14 Mar '22

ASASSN-21mh: SU UMa star Superoutbursts in the ZTF data. Time-resolved ZTF data on 2020 July 13 detected superhumps. The superhump period was near 0.06 d.

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[vsnet-newvar 9104] ASASSN-17eg: refined period and about type
by Taichi Kato 14 Mar '22

14 Mar '22

ASASSN-17eg: refined period and about type Using the ZTF data, I obtained a refined orbital period of 0.07859690(5) d. The mean light curve is unlike that of an short-period dwarf nova or novalike, but is a smooth sinusoidal one with a full amplitude of 0.26 mag. The object looks like to me basically a reflection variable. The 2019 outburst likely came from an accretion disk formed by a small amount of mass-transfer. The transverse velocity is twice larger than that of OV Boo and ASASSN-… [View More]

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[vsnet-newvar 9103] CSS J062450.1+503114: superhump period
by Taichi Kato 13 Mar '22

13 Mar '22

CSS J062450.1+503114: superhump period Itoh-san and Josch Hambsch have reported observations. Well-defined superhumps have been observed and the period has been established to be 0.07768(2) d. The mean amplitude is 0.19 mag.

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[vsnet-newvar 9102] WFI J161953.3+031909: genuine eclipsing Z Cam (+SU UMa?) star in the period gap
by Taichi Kato 13 Mar '22

13 Mar '22

WFI J161953.3+031909: genuine eclipsing Z Cam (+SU UMa?) star in the period gap ZTF data indicate that this object is a genuine Z Cam star. Long standstill in 2021 Feb.-Sep. There has been no indication of the IW And-type phenomenon. Long outbursts in 2019 may have been superoutbursts. The supercycle(?) was 70-90 d with a long duty cycle. This would be classified as UGZ+UGSU(ER):+E.

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[vsnet-newvar 9100] CRTS J094327.3-272039 superoutburst
by Taichi Kato 11 Mar '22

11 Mar '22

CRTS J094327.3-272039 superoutburst YYYYMMDD(UT) mag observer 20211231.7147 <165C (Masayuki Moriyama) 20220210.5993 <164C (Masayuki Moriyama) 20220306.6399 13.66C (Masayuki Moriyama) 20220309.6518 13.92C (Masayuki Moriyama)

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[vsnet-newvar 9099] ASASSN-22cw: most likely new WZ Sge-type dwarf nova
by Taichi Kato 09 Mar '22

09 Mar '22

ASASSN-22cw: most likely new WZ Sge-type dwarf nova Berto Monard has reported observations. Two cycles of variations were recorded. The period was 0.0528(7) d and a full amplitude of 0.08 mag. The profile is doubly humped with the second one brighter and this suggests that the variation early superhumps. Note that the period may be shorter than 0.05332 d in GW Lib. Further observations are needed to confirm and then update the period.

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[vsnet-newvar 9098] CSS J062450.1+503114 superoutburst
by Taichi Kato 08 Mar '22

08 Mar '22

CSS J062450.1+503114 superoutburst YYYYMMDD(UT) mag observer 20220302.2466 18.674zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220303.5583 <159c (Yutaka Maeda) 20220304.5625 <159c (Yutaka Maeda) 20220305.5644 145cG (Yutaka Maeda) 20220306.5677 141cG (Yutaka Maeda) 20220307.5718 144cG (Yutaka Maeda) 20220307.5718 144cG (Yutaka Maeda)

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[vsnet-newvar 9093] MASTER OT J111759.87+765131.6 superoutburst
by Taichi Kato 07 Mar '22

07 Mar '22

MASTER OT J111759.87+765131.6 superoutburst (Known SU UMa star) YYYYMMDD(UT) mag observer 20220220.6509 <150c (Yutaka Maeda) 20220224.6137 <149c (Yutaka Maeda) 20220225.6146 <157c (Yutaka Maeda) 20220226.6296 <164c (Yutaka Maeda) 20220227.6210 <163c (Yutaka Maeda) 20220303.6164 143c (Yutaka Maeda)

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[vsnet-newvar 9096] ASASSN-16de superoutburst
by Taichi Kato 07 Mar '22

07 Mar '22

ASASSN-16de superoutburst YYYYMMDD(UT) mag observer 20220226.8491 <150c (Yutaka Maeda) 20220227.8247 155:c (Yutaka Maeda) 20220227.8247 155:c (Yutaka Maeda) 20220302.5295 14.915zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220302.8181 145c (Yutaka Maeda) 20220302.8182 145c (Yutaka Maeda) 20220303.8167 <142c (Yutaka Maeda) 20220305.8242 147:cG (Yutaka Maeda)

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[vsnet-newvar 9092] DDE 39 possible superoutburst
by Taichi Kato 04 Mar '22

04 Mar '22

DDE 39 possible superoutburst (Known SU UMa star) YYYYMMDD(UT) mag observer 20220220.517 <175C (Mitsutaka Hiraga) 20220222.539 <178C (Mitsutaka Hiraga) 20220223.542 <178C (Mitsutaka Hiraga) 20220224.4968 <172C (Masayuki Moriyama) 20220226.6103 <161C (Masayuki Moriyama) 20220304.823 158C (Jeremy Shears)

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