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

[vsnet-alert 27344] V1108 Her outburst (first since 2004)
by Taichi Kato 22 Jan '23

22 Jan '23

V1108 Her outburst (first since 2004) YYYYMMDD(UT) mag observer 20230121.8929 103cG (Yutaka Maeda) WZ Sge star, but the early phase of the 2004 outburst was not recorded. Not observed in 2023 Jan. by ATLAS and ASAS-SN.

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[vsnet-alert 27343] MASTER OT J064725.70+491543.9 superoutburst
by Taichi Kato 21 Jan '23

21 Jan '23

MASTER OT J064725.70+491543.9 superoutburst Known SU UMa star. YYYYMMDD(UT) mag observer 20221231.7576 <151c (Yutaka Maeda) 20230102.7311 <162c (Yutaka Maeda) 20230103.7188 <153c (Yutaka Maeda) 20230104.7140 <144c (Yutaka Maeda) 20230107.3305 17.979zr (ZTF Alert DC mag (Masci+ 2019)) 20230107.7833 <146c (Yutaka Maeda) 20230108.6708 <165C (Masayuki Moriyama) 20230108.7384 <150c (Yutaka Maeda) 20230109.7793 <151c (Yutaka Maeda) 20230110.7574 146:cG (Yutaka Maeda) 20230112.2428 14.255zr (ZTF Alert DC mag (Masci+ 2019)) 20230116.622 137C (Mitsutaka Hiraga) 20230120.7377 141cG (Yutaka Maeda)

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[vsnet-alert 27342] PNVJ06245297+0208207: please continue observations
by Taichi Kato 21 Jan '23

21 Jan '23

PNVJ06245297+0208207: please continue observations Still staying around 18 mag. Expected to brighten and show superhumps (superhumps may already be present now). YYYYMMDD(UT) mag observer 20221231.8045 <15.639g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20221231.8057 <15.712g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20221231.8070 <15.626g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20221231.9034 18.797o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221231.9115 18.821o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221231.9183 18.974o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230101.9671 <15.986g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20230102.8427 <15.422g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20230102.8440 <15.377g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20230102.8452 <15.469g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20230102.9009 <15.832g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20230102.9022 <15.701g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20230102.9034 <15.627g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20230103.1303 18.350o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230103.1335 18.380o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230104.1302 <15.562g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20230104.1314 <15.561g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20230104.1326 <15.533g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20230104.1605 <15.104g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20230104.1618 15.552g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20230104.1631 <15.532g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20230105.2853 12.320g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20230105.2865 12.301g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20230105.2878 12.407g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20230107.7004 12.35V (Masayuki Moriyama) 20230107.7018 12.16B (Masayuki Moriyama) 20230107.7032 12.16Rc (Masayuki Moriyama) 20230107.7048 12.23Ic (Masayuki Moriyama) 20230108.7298 12.76C (Masayuki Moriyama) 20230109.9929 15.07C (Masao Funada) 20230110.474 16.98C (Hiroshi Itoh) 20230110.4794 16.68V (Katsumi Yoshimoto) 20230110.514 <150 (Hiroyuki Maehara) 20230110.6169 169:C (Masayuki Moriyama) 20230111.633 17.66C (Hiroshi Itoh) 20230112.641 17.48C (Hiroshi Itoh) 20230113.646 17.86C (Hiroshi Itoh) 20230116.590 17.76C (Hiroshi Itoh) 20230120.547 17.92C (Hiroshi Itoh) 20230120.621 <150 (Hiroyuki Maehara)

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[vsnet-alert 27341] PNVJ00215475+5231007: period of ordinary superhumps
by Taichi Kato 21 Jan '23

21 Jan '23

PNVJ00215475+5231007: period of ordinary superhumps Period of superhumps (mostly stage A) is 0.05625(4) d. contributors: Zubareva's team, Kyoto U. team, Itoh-san, Kiyota-san and Tamas Tordai.

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[vsnet-alert 27340] ASASSN-16ga: new SU UMa-type dwarf nova
by Taichi Kato 21 Jan '23

21 Jan '23

ASASSN-16ga: new SU UMa-type dwarf nova Josch Hambsch has reported observations on two nights. Superhumps were apparent on Jan. 20 and 21. The period will be determined as more observations become available (relatively long).

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[vsnet-alert 27339] ASASSN-23af: new SU UMa-type dwarf nova
by Taichi Kato 21 Jan '23

21 Jan '23

ASASSN-23af: new SU UMa-type dwarf nova Josch Hambsch has reported observations on two nights. Superhumps were apparently growing on Jan. 20-21. The period will be determined as more observations become available (around 0.06 d).

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[vsnet-alert 27338] PNVJ00215475+5231007: ordinary superhumps
by Taichi Kato 20 Jan '23

20 Jan '23

PNVJ00215475+5231007: ordinary superhumps Based on observations by Zubareva's team and Kyoto U. team, this object started showing ordinary superhumps on Jan. 17.

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[vsnet-alert 27337] ASASSN-V J202511.39+250535.3 large-amplitude dwarf nova state
by Taichi Kato 19 Jan '23

19 Jan '23

ASASSN-V J202511.39+250535.3 large-amplitude dwarf nova state According to Moriyama-san and ATLAS forced photometry (Tonry et al. 2018; Shingles et al. 2021), this IW And star has been showing large-amplitude dwarf nova outburst (4 mag) since 2022 (dwarf nova state in 2021 with smaller amplitudes).

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[vsnet-alert 27336] DDE 35 sudden brightening, UGZ+VY Scl
by Taichi Kato 19 Jan '23

19 Jan '23

DDE 35 sudden brightening, UGZ+VY Scl Kyoto U. team reported sudden brightening of DDE 35 on Jan. 18. Looking at ATLAS forced photometry (Tonry et al. 2018; Shingles et al. 2021), this object has been showing dwarf nova outburst since 2022. I have adopted a classification of UGZ+VY Scl. Recent data: YYYYMMDD(UT) mag observer 20230103.583 162C (Mitsutaka Hiraga) 20230107.824 164C (Mitsutaka Hiraga) 20230107.8295 159C (Masayuki Moriyama) 20230108.617 162C (Mitsutaka Hiraga) 20230110.594 166C (Mitsutaka Hiraga) 20230111.538 166C (Mitsutaka Hiraga) 20230115.5038 16.469o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230115.5057 16.812o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230115.5209 17.359o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230115.5259 16.769o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230119.5914 14.469o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230119.5951 14.484o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230119.6005 14.478o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230119.6358 14.501o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505))

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[vsnet-alert 27335] Re: 6dFg0752425-545120 outburst
by Taichi Kato 18 Jan '23

18 Jan '23

Re: 6dFg0752425-545120 outburst This was an outburst in 2022 Dec. Well captured by ATLAS -- SS Cyg-type outburst.

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