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614 discussions

[vsnet-chat 9146] Positive superhumps in V425 Cas
by Taichi Kato 18 Apr '22

18 Apr '22

Positive superhumps in V425 Cas Using TESS data, I obtained the orbital period of 0.14899(3) d (amplitude 0.05 mag). Positive superhumps with a mean period of 0.16505(4) d (0.06 mag) were also detected.

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[vsnet-chat 9145] V1363 Cyg: orbital period
by Taichi Kato 17 Apr '22

17 Apr '22

V1363 Cyg: orbital period Using TESS data, I obtained an orbital period of 0.7984(2) d. The light curve suggests shallow eclipses with 0.17 mag primary and 0.09 mag secondary superimposed on reflection effect. The value (20-40 hr) suggested in https://ui.adsabs.harvard.edu/abs/2022arXiv220205699S/abstract is somewhat an overestimate.

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[vsnet-chat 9144] ATOJ298.2963-09.2246: NL
by Taichi Kato 15 Apr '22

15 Apr '22

ATOJ298.2963-09.2246: NL From ZTF data. Flickering.

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[vsnet-chat 9143] ASASSN-VJ002356.47+424707.8 recent data
by Taichi Kato 15 Apr '22

15 Apr '22

ASASSN-VJ002356.47+424707.8 recent data (NL) ASAS-SN: https://asas-sn.osu.edu/sky-patrol/coordinate/d346cd07-d935-4a88-8d94-8e675…

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[vsnet-chat 9142] PS1-3PIJ072601.70+040838.8: low-amplitude Z Cam star
by Taichi Kato 14 Apr '22

14 Apr '22

PS1-3PIJ072601.70+040838.8: low-amplitude Z Cam star From ZTF data.

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[vsnet-chat 9141] PS1-3PIJ014740.29+560726.3: NL
by Taichi Kato 14 Apr '22

14 Apr '22

PS1-3PIJ014740.29+560726.3: NL From ZTF data. Flickering.

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[vsnet-chat 9140] PS1-3PIJ221407.92+524213.0: low-amplitude Z Cam star
by Taichi Kato 14 Apr '22

14 Apr '22

PS1-3PIJ221407.92+524213.0: low-amplitude Z Cam star From ZTF data. Shallow low state was also present.

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[vsnet-chat 9139] CW Mon: correction of the orbital period
by Taichi Kato 14 Apr '22

14 Apr '22

CW Mon: correction of the orbital period Using TESS data, Porb=0.193467(4) d. Ellipsoidal variation (amplitude 0.23 mag) and no eclipses.

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[vsnet-chat 9138] MGAB-V1183: R
by Taichi Kato 14 Apr '22

14 Apr '22

MGAB-V1183: R This object is R (not R+E:). P=0.03497920(3) d from the ZTF data. Eclipse-like events in the older ZTF data were noises (no periodicity). No such events in the recent data.

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[vsnet-chat 9137] NADA-V123: R
by Taichi Kato 14 Apr '22

14 Apr '22

NADA-V123: R Using TESS data, I obtained a very clear sinusoidal light curve with an amplitude of 0.15 mag. This object is not IBWD: but R. Detached WD+SD binaries below the period minimum are rare and this object needs to be studied in more detail.

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