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

[vsnet-chat 9311] ASASSN-V J003612.92-464406.4: polar
by Taichi Kato 10 Feb '23

10 Feb '23

ASASSN-V J003612.92-464406.4: polar Using ATLAS forced photometry (Tonry et al. 2018; Shingles et al. 2021). Porb=0.0918846(1) d. 1.4-mag orbital variation. High and low states.

1 0

[vsnet-chat 9310] VSOLJ bulletin no.106
by meineko 07 Feb '23

07 Feb '23

New VSOLJ bulletin is avaialble at http://vsolj.cetus-net.org/bulletin.html No.106 2023 Feb. SU UMa-type supercycle in the IW And-type dwarf nova BO Cet above the period gap Taichi Kato Seiichiro Kiyota VSOLJ

1 0

[vsnet-chat 9309] ASASSN-14mn: SU UMa star
by Taichi Kato 03 Feb '23

03 Feb '23

ASASSN-14mn: SU UMa star ZTF detected superhumps on 2019 Dec. 2 (period near 2 hr). This was a superoutburst confirmed by ATLAS data. Low-amplitude SU UMa star.

1 0

[vsnet-chat 9308] V351 UMa: bright outburst in 2017?
by Taichi Kato 29 Jan '23

29 Jan '23

V351 UMa: bright outburst in 2017? YYYYMMDD(UT) mag observer 20170303.5505 13.692o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20170303.5684 13.457o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20170303.5758 13.459o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20170303.5943 13.893o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505))

1 0

[vsnet-chat 9307] WX Pyx: VY Scl star
by Taichi Kato 28 Jan '23

28 Jan '23

WX Pyx: VY Scl star (Already suggested in the past. Fading in 2004 Mar.-Apr. detected by B. Monard). ATLAS forced photometry (Tonry et al. 2018; Shingles et al. 2021) showed multiple fadings between 2018 and 2022. Minimum generally 19.0 mag.

1 0

[vsnet-chat 9306] ASASSN-19gv: UGSU:+E
by Taichi Kato 23 Jan '23

23 Jan '23

ASASSN-19gv: UGSU:+E https://arxiv.org/abs/2301.08581 Object listed as TYC 8920-22-1. The orbital period suggests an object near the lower border of the period gap. ATLAS indeed detected several outbursts (but without a true superoutburst yet).

1 0

[vsnet-chat 9305] SDSSJ090113.51+144704.6 orbital period
by Taichi Kato 23 Jan '23

23 Jan '23

SDSSJ090113.51+144704.6 orbital period Confirmation of https://arxiv.org/abs/2301.08581 Porb = 0.146326(4) d from the TESS data. What were reported to be grazing eclipses had a mean depth of 0.015 mag and I cannot tell whether they are eclipses or not. The claimed IW And-type phenomenon was not followed by fading from the standstill (ATLAS and ASAS-SN). My conclusion is UGZ (as original) or UGZ+E:

1 0

[vsnet-chat 9304] Re: RX J1831.7+6511: new IW And star
by Taichi Kato 20 Jan '23

20 Jan '23

Re: RX J1831.7+6511: new IW And star > Although "dips" were not caught (likely below the limit > of ASAS-SN), According to ATLAS forced photometry (Tonry et al. 2018; Shingles et al. 2021), no dips were present. I changed to UGZ:

1 0

[vsnet-chat 9303] PS1-3PIJ072307.88-262324.1 = ATOJ110.7828-26.3900: Z Cam star
by Taichi Kato 19 Jan '23

19 Jan '23

PS1-3PIJ072307.88-262324.1 = ATOJ110.7828-26.3900: Z Cam star Using ATLAS forced photometry (Tonry et al. 2018; Shingles et al. 2021). Range 16.6-18.0 (ATLAS). Low-amplitude dwarf nova (particularly before 2018). Currently in bright state (standstill).

1 0

[vsnet-chat 9302] SSSJ053711.5-291024: SS Cyg
by Taichi Kato 19 Jan '23

19 Jan '23

SSSJ053711.5-291024: SS Cyg Using ATLAS forced photometry (Tonry et al. 2018; Shingles et al. 2021). Range 15.3-18.5 (ATLAS). SS Cyg star. Some moment with reduced outburst amplitudes and may show a standstill in future.

1 0