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

[vsnet-newvar 9776] PNV J06245297+0208207 fading rapidly
by Taichi Kato 12 Feb '23

12 Feb '23

PNV J06245297+0208207 fading rapidly Rapidly fading after a maximum on Feb. 10. Observers: Tamas Tordai, Crimean Astrophys. Obs. team, Josch Hambsch, Filipp Romanov

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[vsnet-newvar 9775] ASASSN-23af rebrightening
by Taichi Kato 12 Feb '23

12 Feb '23

ASASSN-23af rebrightening Josch Hambsch has reported that this object brightened on Feb. 11 and is at 15.5. This behavior suggests a long rebrightening of a WZ Sge star.

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[vsnet-newvar 9774] Re: CRTS J103317.3+072119 bright outburst
by Taichi Kato 11 Feb '23

11 Feb '23

Re: CRTS J103317.3+072119 bright outburst Last superoutburst in 2021 June. YYYYMMDD(UT) mag observer 20230130.6625 <157c (Yutaka Maeda) 20230204.6566 <152c (Yutaka Maeda) 20230210.0554 14.348o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230210.0815 14.281o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230210.1102 14.249o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230210.2708 14.379o (ATLAS Forced Photometry (Tonry+2018,… [View More]

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[vsnet-newvar 9773] CRTS J103317.3+072119 bright outburst
by Taichi Kato 11 Feb '23

11 Feb '23

CRTS J103317.3+072119 bright outburst Known SU UMa star, but single-night observation was available in the past. YYYYMMDD(UT) mag observer 20230120.6737 <157c (Yutaka Maeda) 20230121.6604 <157c (Yutaka Maeda) 20230130.6625 <157c (Yutaka Maeda) 20230204.6566 <152c (Yutaka Maeda) 20230210.7456 139cG (Yutaka Maeda)

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[vsnet-newvar 9772] MASTER OT J030205.67+254834.3 outburst
by Taichi Kato 11 Feb '23

11 Feb '23

MASTER OT J030205.67+254834.3 outburst Known SU UMa star. Previous superoutburst was in 2016. YYYYMMDD(UT) mag observer 20230130.5481 <152c (Yutaka Maeda) 20230202.5485 <155c (Yutaka Maeda) 20230204.5238 <155c (Yutaka Maeda) 20230205.4938 <157c (Yutaka Maeda) 20230207.5061 <158c (Yutaka Maeda) 20230208.5243 <141c (Yutaka Maeda) 20230210.5481 156:c (Yutaka Maeda) 20230210.5481 156:c (Yutaka Maeda)

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[vsnet-newvar 9771] ASASSN-15cm: SU UMa star with Porb=0.2085 d
by Taichi Kato 11 Feb '23

11 Feb '23

ASASSN-15cm: SU UMa star with Porb=0.2085 d Using ZTF (Masci et al., 2019) and ATLAS forced photometry (Tonry et al. 2018; Shingles et al. 2021) data, I found that this object showed a superoutburst in 2019 Aug. Like BO Cet with the same set of data (arXiv:2302.02593 = VSOLJ Variable Star Bulletin No. 106), I obtained a period of 0.2196(1) d, 5.3% longer than the orbital period. This corresponds to q about 0.22 (arXiv:2201.02945 = VSOLJ Variable Star Bulletin No. 89). The core of the … [View More]

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[vsnet-newvar 9770] Re: ASASSN-15cc bright outburst continues
by Taichi Kato 11 Feb '23

11 Feb '23

Re: ASASSN-15cc bright outburst continues > Time-resolved photometry is encouraged. Itoh-san just reported observations on two nights. No superhumps were present. SS Cyg star or superhumps may appear?

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[vsnet-newvar 9769] ASASSN-15cc bright outburst continues
by Taichi Kato 11 Feb '23

11 Feb '23

ASASSN-15cc bright outburst continues Time-resolved photometry is encouraged. YYYYMMDD(UT) mag observer 20230130.6035 <159c (Yutaka Maeda) 20230202.6035 <154c (Yutaka Maeda) 20230204.5955 138:cG (Yutaka Maeda) 20230205.6115 136:cG (Yutaka Maeda) 20230207.5598 142:c (Yutaka Maeda) 20230207.5598 142:c (Yutaka Maeda) 20230207.7202 146C (Masayuki Moriyama) 20230210.453 150 (Rod Stubbings)

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[vsnet-newvar 9768] PNV J06245297+0208207 brightened again
by Taichi Kato 11 Feb '23

11 Feb '23

PNV J06245297+0208207 brightened again According to observations by Itoh-san and Tamas Tordai, The object brightened to 13.5 mag on Feb. 10 (apparently oscillating with a time scale of about 1 d). The brightening part on Feb. 9 was recorded by Crimean Astrophys. Obs. team.

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[vsnet-newvar 9767] 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.

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vsnet-newvar February 2023