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[vsnet-chat 9179] ASASSN-14fu: orbital period
by Taichi Kato 26 Apr '22

26 Apr '22

ASASSN-14fu: orbital period From ZTF data. Porb=0.1601606(6) d. Double maxima in one cycle (0.27 mag). There was no evidence for 0.020-0.025 d period in these data.

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[vsnet-chat 9178] 1RXS J233801.0+430852: orbital period
by Taichi Kato 26 Apr '22

26 Apr '22

1RXS J233801.0+430852: orbital period From ZTF data. Porb=0.1601353(7) d. Nearly sinusoidal 0.22 mag. The period is slightly different from the one in Weil et al. (2018) AJ 156, 231. There was no signal at 0.160400 d.

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[vsnet-chat 9177] V367 Peg: orbital period
by Taichi Kato 26 Apr '22

26 Apr '22

V367 Peg: orbital period From ZTF data. Porb=0.1618037(5) d. Eclipsing as already reported.

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[vsnet-chat 9176] X Leo: orbital period
by Taichi Kato 26 Apr '22

26 Apr '22

X Leo: orbital period From TESS data (2020 data only). Porb=0.164251(8) d (amp. 0.023 mag). Smaller secondary maximum.

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[vsnet-chat 9175] HS1813+6122: orbital period
by Taichi Kato 26 Apr '22

26 Apr '22

HS1813+6122: orbital period From TESS data (2020 data only). Porb=0.1475122(6) d (amp. 0.05 mag). Negative superhumps were not detected. This objectis Z Cam + VY Scl. Regular outbursts in TESS data in 2020.

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[vsnet-chat 9174] RZ LMi: possible orbital period
by Taichi Kato 26 Apr '22

26 Apr '22

RZ LMi: possible orbital period Using TESS data in 2020, I detected a period of 0.058005(8) d (amp. 0.02 mag). This value is close to what was derived in Kato et al. (2016) PASJ 68, 107. This result seems to strengthen the idea that the core of the secondary in RZ LMi is evolved, as suggested in Kato et al. (2016). This period was not very apparent in TESS data in 2022.

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[vsnet-chat 9173] VSOLJ Variable Star Bulletin No.100
by meineko 25 Apr '22

25 Apr '22

VSOLJ Variable Star Bulletin No.100 is now available at http://vsolj.cetus-net.org/bulletin.html No.100 2022 Apr.F Z Cam star PY Per in SU UMa state? Taichi Kato --------------------------------- Seiichiro Kiyota VSOLJ

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[vsnet-chat 9172] V1189 Her orbital period
by Taichi Kato 25 Apr '22

25 Apr '22

V1189 Her orbital period Using ZTF data. Porb=0.0927567(3) d. The profile is rather strange in that amplitudes of the peak strongly vary from almost zero to 1 mag.

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[vsnet-chat 9171] SDSS J153634.42+332851.9 orbital period
by Taichi Kato 25 Apr '22

25 Apr '22

SDSS J153634.42+332851.9 orbital period Using ZTF data. Porb=0.0920302(3) d. Orbital humps 0.3 mag.

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[vsnet-chat 9170] BT CrB orbital period
by Taichi Kato 25 Apr '22

25 Apr '22

BT CrB orbital period Using ZTF data. Porb=0.0880915(1) d. Eclipses 0.8 mag deep in quiescence and orbital humps 0.2 mag. Type from outburst observation has been confirmed.

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