September 2021 - vsnet-chat - ooruri.kusastro.kyoto-u.ac.jp

[vsnet-chat 8815] MGAB-V507: SU UMa star with unusual activity
by Taichi Kato 02 Sep '21

02 Sep '21

MGAB-V507: SU UMa star with unusual activity ZTF time-resolved data recorded superhumps on 2018 Aug. 7 and 8. The period appears to be short (about 0.05 d). Dip in superoutburst in 2019 July. The object may be an EI Psc star.

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[vsnet-chat 8814] MGAB-V481: SU UMa star
by Taichi Kato 02 Sep '21

02 Sep '21

MGAB-V481: SU UMa star ZTF time-resolved data recorded superhumps on 2018 Aug. 17 and 18.

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[vsnet-chat 8813] MGAB-V439: Z Cam star
by Taichi Kato 02 Sep '21

02 Sep '21

MGAB-V439: Z Cam star From ZTF data. Standstill in 2020 Nov.-2021 Apr.

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[vsnet-chat 8812] MGAB-V432: orbital period
by Taichi Kato 02 Sep '21

02 Sep '21

MGAB-V432: orbital period From ZTF data. Porb=0.1844186(3) d. UGSS+E.

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[vsnet-chat 8811] MGAB-V390: deeply eclipsing, low-amplitude dwarf nova
by Taichi Kato 02 Sep '21

02 Sep '21

MGAB-V390: deeply eclipsing, low-amplitude dwarf nova From ZTF data. Porb=0.1553445(2) d. Eclipse nearly 3.0 mag. Low-amplitude SS Cyg-type dwarf nova (as of now, standstill may be expected).

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[vsnet-chat 8810] ZTF18aaxyrpd: VY Scl+E
by Taichi Kato 02 Sep '21

02 Sep '21

ZTF18aaxyrpd: VY Scl+E According to ZTF data, Porb = 0.1292706(1) with 0.4 mag eclipses. Faint state in 2019 Aug.-Sep.

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[vsnet-chat 8809] ZTF18aaxyrpd: IW And star
by Taichi Kato 02 Sep '21

02 Sep '21

ZTF18aaxyrpd: IW And star According to ZTF data, this object is a typical IW And star (pattern well visible in the 2020 data).

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[vsnet-chat 8808] ZTF18acullhv: possible AM CVn star
by Taichi Kato 02 Sep '21

02 Sep '21

ZTF18acullhv: possible AM CVn star According to ZTF data, this object showed complex outbursts similar to AM CVn-type superoutbursts. 064321.2 -234008 (2000.0) Gaia_DR2_2925381050846472192 group_C4 g=16.742(0.543) Mowlavi2020 064321.279 -234008.94 (2000.0) Gaia_DR2_2925381050846472064 plx=-(-) dismod=- pmra=-(-) pmdec=-(-) G=16.742 BP=16.680 RP=16.692 064321.280 -234008.96 (2000.0) Gaia_EDR3_2925381050848348288 plx=1.868(0.088) dismod=8.6 pmra=17.795(0.054) pmdec=-33.375(0.077) G=18.596 BP=18.550 RP=18.445 Blue and low-luminosity (M_V = +6.3 at max), consistent with the AM CVn-type classification. This object is bright (15 mag at max) and further observations to search for superhumps and spectroscopy are desirable.

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[vsnet-chat 8807] ZTF18abjgdkx: deeply eclipsing likely IW And star
by Taichi Kato 02 Sep '21

02 Sep '21

ZTF18abjgdkx: deeply eclipsing likely IW And star According to ZTF data, this object shows deep (1.2 mag) eclipses. The period is 0.2108865(4) d. The overall light curve suggests an IW And star (particularly in 2020).

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vsnet-chat September 2021