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

[vsnet-newvar 9737] 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).

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[vsnet-newvar 9736] 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:

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[vsnet-newvar 9735] MASTER OT J172758.09+380021.5 likely superoutburst
by Taichi Kato 23 Jan '23

23 Jan '23

MASTER OT J172758.09+380021.5 likely superoutburst YYYYMMDD(UT) mag observer 20230102.8771 <147c (Yutaka Maeda) 20230103.8655 <154c (Yutaka Maeda) 20230110.8827 <142c (Yutaka Maeda) 20230120.8694 144cG (Yutaka Maeda) 20230121.2610 14.44cG (Masao Funada)

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[vsnet-newvar 9734] ASASSN-14fx outburst
by Taichi Kato 23 Jan '23

23 Jan '23

ASASSN-14fx outburst First bright outburst since the 2018 one. YYYYMMDD(UT) mag observer 20230107.5941 <151c (Yutaka Maeda) 20230108.5207 <158c (Yutaka Maeda) 20230108.569 <177C (Mitsutaka Hiraga) 20230108.6123 <166C (Masayuki Moriyama) 20230109.5494 <152c (Yutaka Maeda) 20230110.5468 <158c (Yutaka Maeda) 20230120.5248 <142c (Yutaka Maeda) 20230121.5064 158:c (Yutaka Maeda)

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[vsnet-newvar 9733] MASTER OT J064725.70+491543.9 superoutburst
by Taichi Kato 22 Jan '23

22 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-newvar 9732] PNVJ06245297+0208207: please continue observations
by Taichi Kato 22 Jan '23

22 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-newvar 9731] PNVJ00215475+5231007: period of ordinary superhumps
by Taichi Kato 22 Jan '23

22 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-newvar 9730] 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-newvar 9729] 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-newvar 9728] PNVJ00215475+5231007: ordinary superhumps
by Taichi Kato 21 Jan '23

21 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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