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

[vsnet-alert 27307] ASASSN-22oh: WZ Sge star below the period minimum
by Taichi Kato 13 Jan '23

13 Jan '23

ASASSN-22oh: WZ Sge star below the period minimum Josch Hambsch has reported further observations. I obtained a period of 0.05155(8) d and the profile is compatible with that of early superhumps (full amplitude 0.04 mag). More time-resolved observations are requested considering the likely unusual nature (either core-evolved CV or a population II like OV Boo).

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[vsnet-alert 27306] PNVJ00215475+5231007: WZ Sge star
by Taichi Kato 13 Jan '23

13 Jan '23

PNVJ00215475+5231007: WZ Sge star Kyoto U team, Kiyota-san and Itoh-san have reported new observations. Early superhumps with a period of 0.05572(9) d were detected. The full amplitude was 0.027 mag.

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[vsnet-alert 27305] PNVJ00215475+5231007: likely WZ Sge star
by Taichi Kato 12 Jan '23

12 Jan '23

PNVJ00215475+5231007: likely WZ Sge star Kiyota-san and Itoh-san have reported observations. 0.04-mag early superhumps with a period of 0.058(1) d were likely present. Since the amplitude was small and the baseline was a few cycles, confirmatory observations are needed.

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[vsnet-alert 27304] ASASSN-22oh: no strong evidence for early superhumps
by Taichi Kato 11 Jan '23

11 Jan '23

ASASSN-22oh: no strong evidence for early superhumps Josch Hambsch reported observations on two nights. No apparent (>0.05 mag) early superhumps were present, but would be detected by higher time-resolution observations.

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[vsnet-alert 27303] PNVJ06245297+0208207: further fading
by Taichi Kato 11 Jan '23

11 Jan '23

PNVJ06245297+0208207: further fading This helium dwarf nova faded to 16 mag on Jan. 10 based on observations by Josch Hambsch. It is expected to brighten again and show superhumps. Please continue your observations.

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[vsnet-alert 27302] Gaia DR3 6134636930031090560 = ASASSN-23ab
by Taichi Kato 11 Jan '23

11 Jan '23

Gaia DR3 6134636930031090560 = ASASSN-23ab Bright outburst but likely an SS Cyg star. ASASSN-23ab --- ------- 13:8:59.07 -45:8:29.4 2023-01-5.28 11.72 SDSS DSS VIZIER ------- CV candidate, matches to GAIA DR3 G=16.4, g>18.0 on 2023-01-03.07, g=12.1 on 2023-01-05.28, g=13.5 on 2023-01-08.27, g=14.2 on 2023-01-09.11 Outburst in ASAS-3: YYYYMMDD(UT) mag observer 20080509.1397 <14.50V (ASAS (Pojmanski, G. 2002, Acta Astron. 52,397)) 20080511.1244 13.545V (ASAS (Pojmanski, G. 2002, Acta Astron. 52,397)) 20080513.1488 12.515V (ASAS (Pojmanski, G. 2002, Acta Astron. 52,397)) 20080515.1427 13.741V (ASAS (Pojmanski, G. 2002, Acta Astron. 52,397)) 20080517.1655 <14.50V (ASAS (Pojmanski, G. 2002, Acta Astron. 52,397))

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[vsnet-alert 27301] ASASSN-14im outburst
by Taichi Kato 11 Jan '23

11 Jan '23

ASASSN-14im outburst Large-amplitude variation in quiescence in ZTF data. YYYYMMDD(UT) mag observer 20230107.6142 <150c (Yutaka Maeda) 20230108.5412 <156c (Yutaka Maeda) 20230108.578 <177C (Mitsutaka Hiraga) 20230108.6287 <163C (Masayuki Moriyama) 20230109.5699 152:c (Yutaka Maeda)

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[vsnet-alert 27300] KZ Gem outburst
by Taichi Kato 11 Jan '23

11 Jan '23

KZ Gem outburst (SS Cyg star?) YYYYMMDD(UT) mag observer 20230102.7140 <160c (Yutaka Maeda) 20230103.7017 <154c (Yutaka Maeda) 20230104.6969 <146c (Yutaka Maeda) 20230107.7661 <142c (Yutaka Maeda) 20230108.7213 146:c (Yutaka Maeda) 20230109.1496 14.40C (Masao Funada) 20230109.7621 146:c (Yutaka Maeda) 20230110.024 14.50C (Gary Poyner) 20230110.0237 14.41C (Masao Funada)

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[vsnet-alert 27299] SS UMi superoutburst
by Taichi Kato 11 Jan '23

11 Jan '23

SS UMi superoutburst YYYYMMDD(UT) mag observer 20230102.8283 <154c (Yutaka Maeda) 20230103.8162 <152c (Yutaka Maeda) 20230107.8855 136:cG (Yutaka Maeda) 20230108.728 146C (Mitsutaka Hiraga) 20230108.8059 136:c (Yutaka Maeda) 20230108.8059 136:c (Yutaka Maeda) 20230109.267 13.75C (Gary Poyner) 20230109.8620 139c (Yutaka Maeda)

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[vsnet-alert 27298] Gaia23aeh: large-amplitude outburst of a likely premain-sequence star
by Taichi Kato 10 Jan '23

10 Jan '23

Gaia23aeh: large-amplitude outburst of a likely premain-sequence star Could be an FU Ori or EX Lup outburst? http://gsaweb.ast.cam.ac.uk/alerts/alert/Gaia23aeh/ Gaia23aeh AT2022aefx 2022-12-17 04:54:00 302.04852 30.98031 17.55 20.17 0.62 unknown 2023-01-09 12:42:53 ~3 mag rise in Gaia source in the galactic plane Gaia: 200811.641 +305849.09 (2000.0) Gaia_DR2_2029961145080697472 plx=-0.230(0.683) dismod=- pmra=-1.089(0.939) pmdec=-5.159(1.185) G=20.254 BP=21.387 RP=18.763 200811.641 +305849.09 (2000.0) Gaia_EDR3_2029961145080697472 plx=0.840(0.516) dismod=10.4 pmra=-2.341(0.446) pmdec=-4.363(0.545) G=20.241 BP=21.646 RP=19.003

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