June 2023 - vsnet-newvar - ooruri.kusastro.kyoto-u.ac.jp

[vsnet-newvar 10158] ASASSN-19ct rebrightening or standstill
by Taichi Kato 13 Jun '23

13 Jun '23

ASASSN-19ct rebrightening or standstill AM CVn star + UGZ. YYYYMMDD(UT) mag observer 20230606.8855 14.592g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230606.9879 14.793g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230607.1534 15.122g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230607.9843 15.106g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230608.1438 15.299g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230608.1450 15.282g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230608.1755 15.097g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230612.510 151 (Rod Stubbings)

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[vsnet-newvar 10157] ASASSN-22ak rebrightening
by Taichi Kato 12 Jun '23

12 Jun '23

ASASSN-22ak rebrightening Josch Hambsch has reported observations. The object returned to the bright state on June 9-10 and was still bright on the next night.

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[vsnet-newvar 10156] MisV1449: orbital and superhump periods
by Taichi Kato 11 Jun '23

11 Jun '23

MisV1449: orbital and superhump periods Using ZTF data, I obtained an orbital period of 0.1239497(1) d (very clear ellipsoidal variation, 0.17 mag). Tonny Vanmunster and Josch Hambsch reported observations. The superhump period is 0.1333(2) d. This superhump excess (stage B) corresponds to q=0.326.

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[vsnet-newvar 10155] ASASSN-23el: new SU UMa star
by Taichi Kato 11 Jun '23

11 Jun '23

ASASSN-23el: new SU UMa star Berto Monard has reported observations. The object shows superhumps (0.19 mag) with a period of 0.0776(2) d. At least not an extreme WZ Sge star.

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[vsnet-newvar 10154] ASASSN-22ak sudden fading
by Taichi Kato 10 Jun '23

10 Jun '23

ASASSN-22ak sudden fading Josch Hambsch detected a sudden fading on June 8 (16.2 to 18.0 in one day). The object was still fading. No major rebrightenings were recorded after past outbursts.

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[vsnet-newvar 10153] ASASSN-13cz superoutburst
by Taichi Kato 09 Jun '23

09 Jun '23

ASASSN-13cz superoutburst Only the final part was observed during the 2016 one. Supercycle 460 d recently and now is the expected time. YYYYMMDD(UT) mag observer 20230521.6193 <178C (Masayuki Moriyama) 20230523.5753 <161c (Yutaka Maeda) 20230524.3048 19.355zg (ZTF Alert DC mag (Masci+ 2019)) 20230602.5198 <160c (Yutaka Maeda) 20230603.5254 <163c (Yutaka Maeda) 20230604.5180 <159c (Yutaka Maeda) 20230605.2286 17.925zg (ZTF Alert DC mag (Masci+ 2019)) 20230605.2571 17.553zr (ZTF Alert DC mag (Masci+ 2019)) 20230607.5265 147c (Yutaka Maeda) 20230607.5265 147c (Yutaka Maeda)

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[vsnet-newvar 10152] MisV1449 rare outburst
by Taichi Kato 07 Jun '23

07 Jun '23

MisV1449 rare outburst Outburst in 2017 May and 2020 Sep. The 2017 one may have been a superoutburst (rebrightening in ATLAS?). The 2020 one was relatively short. Maybe a candidate for an SU UMa star above the period gap similar to SDSSJ094002.56+274942.0. YYYYMMDD(UT) mag observer 20230507.5783 17.109g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230507.5783 17.161g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230509.5134 <17.310g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230606.5216 14.939o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230606.5225 15.022o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230606.5239 14.928o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230606.5305 14.937o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230606.5473 14.916o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021))

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[vsnet-newvar 10151] SDSSJ162830.89+240259.1 superhump period
by Taichi Kato 07 Jun '23

07 Jun '23

SDSSJ162830.89+240259.1 superhump period Josch Hambsch and Itoh-san have reported observations. The superhump period is 0.0701(1) d. Amplitude 0.18 mag.

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[vsnet-newvar 10150] ASASSN-22ak brightened again
by Taichi Kato 07 Jun '23

07 Jun '23

ASASSN-22ak brightened again Josch Hambsch has reported new observations. The object started to brighten again on June 3. This time, superhumps have not been enhanced.

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[vsnet-newvar 10149] GaiaDR32893005857946801152 = ASASSN-23dr, oscillation-type rebrightening
by Taichi Kato 07 Jun '23

07 Jun '23

GaiaDR32893005857946801152 = ASASSN-23dr, oscillation-type rebrightening Josch Hambsch and Maehara-san have reported additional observations. The object faded from superoutburst on May 30-31. After a short dip, the object now shows oscillation-type rebrightenings (like WZ Sge).

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vsnet-newvar June 2023