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

[vsnet-chat 9005] ZTF18aapobha: polar
by Taichi Kato 07 Mar '22

07 Mar '22

ZTF18aapobha: polar P = 0.0752759(5) d from ZTF data. Single-pole acceretor. High Lx/Lopt (1RXS J184415.0+445407).

1 0

[vsnet-chat 9004] NSV 14669: likely constant
by Taichi Kato 03 Mar '22

03 Mar '22

NSV 14669: likely constant ASAS-SN data: https://asas-sn.osu.edu/sky-patrol/coordinate/30a2450b-ade9-48d2-99e3-161ec… Also too faint (M_V) for a LPV.

1 0

[vsnet-chat 9003] VSOLJ bulletin no.092
by meineko 23 Feb '22

23 Feb '22

Dear Observers, A new issue of VSOLJ Variable Star Bulletin is now available at http://vsolj.cetus-net.org/bulletin.html No.92 2022 Feb. Analysis of the IW And star ASAS J071404+7004.3 Taichi Kato, Kiyoshi Kasai, Elena P. Pavlenko, Nikolaj V. Pit, Aleksei A. Sosnovskij,Hiroshi Itoh, Hidehiko Akazawa, Stephen M. Brincat, Leonid E. Keir, Sergei N. Udovichenko,Yusuke Tampo, Naoto Kojiguchi, Masaaki Shibata, Yasuyuki Wakamatsu, Tamás Tordai,Tonny Vanmunster and Charles Galdies Seiihiro Kiyota VSOLJ

1 0

[vsnet-chat 8999] VSOLJ Bulletin No.90
by meineko 14 Feb '22

14 Feb '22

Dear all, A new issue of VSOLJ bulletin is available at http://vsolj.cetus-net.org/bulletin.html No.90 Emerging ordinary superhumps as the standard candle for WZ Sge stars Taichi Kato Seiichiro Kiyota VSOLJ

1 1

[vsnet-chat 9001] Is AH Her an IW And star?
by Taichi Kato 10 Feb '22

10 Feb '22

Is AH Her an IW And star? > https://ui.adsabs.harvard.edu/abs/2017RAA....17...56H/abstract Looking at the data more closely, this standstill of AH Her a shallow dip before the termination (around JD 2457165), which is different from the typical behavior of IW And stars.

1 0

[vsnet-chat 9000] AY Psc: eclipsing IW And star
by Taichi Kato 09 Feb '22

09 Feb '22

AY Psc: eclipsing IW And star See fig. 8 in https://ui.adsabs.harvard.edu/abs/2017RAA....17...56H/abstract Also more events in the AAVSO data.

1 0

[vsnet-chat 8998] MASTER OT J064855.37-055545.7 = ASASSN-21fj
by Taichi Kato 21 Jan '22

21 Jan '22

MASTER OT J064855.37-055545.7 = ASASSN-21fj https://gcn.gsfc.nasa.gov/gcn/gcn3/26470.gcn3

1 0

[vsnet-chat 8997] VSOLJ bullein No.89
by meineko 09 Jan '22

09 Jan '22

Following new VSOLJ Bulletin are available at http://vsolj.cetus-net.org/bulletin.html No.89 2021 Jan. Evolution of short-period cataclysmic variables: implications from eclipse modeling and stage A superhump method (with New Year’s gift) Taichi Kato Seiichiro Kiyota VSOLJ

1 0

[vsnet-chat 8996] ZTF19abrqett: IW And-like phenomenon
by Taichi Kato 21 Dec '21

21 Dec '21

ZTF19abrqett: IW And-like phenomenon There was only one short fading in the ZTF data in 2020 July. The object brightened before and after this event and it is most likely a disk-instability phenomenon similar to an IW And-type dip, not VY Scl phenomenon.

1 0

[vsnet-chat 8995] ZTF19acqxtql: outbursts from an intermediate polar?
by Taichi Kato 21 Dec '21

21 Dec '21

ZTF19acqxtql: outbursts from an intermediate polar? ZTF data show two outbursts in 2019 Nov. They were only 8 d apart and no other outbursts were detected. The fading rates were very rapid (2 mag/d) and they look like IP outbursts.

1 0

2025

2024

2023

2022

2021

vsnet-chat