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

[vsnet-newvar 9707] ASASSN-22oh superhumps
by Taichi Kato 17 Jan '23

17 Jan '23

ASASSN-22oh superhumps Josch Hambsch's observations show that this object started showing ordinary superhumps on Jan. 14 (some hint on Jan. 13). The period (stage A) is 0.05539(8) d and the amplitude is relatively large (0.2 mag). Probably not an extreme WZ Sge star.

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[vsnet-newvar 9706] Re: Spectrum of PNV J00215475+5231007
by Taichi Kato 14 Jan '23

14 Jan '23

Re: Spectrum of PNV J00215475+5231007 Taguchi-san probably forgot to mention about He II and Bowen blend, which is frequently seen in (relatively) high-inclination WZ Sge stars in the earliest phase of outburst.

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[vsnet-newvar 9705] ATLAS22bopd: more likely UG
by Taichi Kato 13 Jan '23

13 Jan '23

ATLAS22bopd: more likely UG ATLAS data: YYYYMMDD(UT) mag observer 20221231.1897 15.411o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221231.1992 15.400o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221231.2131 15.487o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221231.2185 15.447o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230101.9713 15.649o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230101.9749 15.668o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230101.9961 15.698o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230102.0034 15.672o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230104.1508 15.902o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230104.1526 15.925o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230104.1558 15.891o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230104.1612 15.878o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230108.1758 16.142o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230108.1785 16.124o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230108.1942 16.105o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230108.1997 16.221o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230109.9391 16.482o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230109.9446 16.536o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230109.9482 16.489o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230109.9816 16.424o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230112.1533 16.676o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230112.1565 16.685o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230112.1611 16.765o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) In quiescence 3 d before (ATLAS). GALEX ID: 063247.060 -722006.25 (2000.0) GALEX_DR5_6385763636743246280 NUV=22.251(0.362) FUV=21.743(0.489)

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[vsnet-newvar 9704] ATLAS23agq = Gaia23afl
by Taichi Kato 13 Jan '23

13 Jan '23

ATLAS23agq = Gaia23afl > [vsnet-alert 27308] Gaia23afl

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[vsnet-newvar 9703] CRTSJ223235.4+304105 likely superoutburst
by Taichi Kato 13 Jan '23

13 Jan '23

CRTSJ223235.4+304105 likely superoutburst Apparent superoutburst in ZTF data in 2020 Aug.-Sep. (precursor + main + rebrightening) YYYYMMDD(UT) mag observer 20230107.1218 16.435zg (ZTF Alert DC mag (Masci+ 2019)) 20230107.1524 16.849zr (ZTF Alert DC mag (Masci+ 2019))

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[vsnet-newvar 9702] Gaia23afl
by Taichi Kato 13 Jan '23

13 Jan '23

Gaia23afl Gaia23afl AT2023dn 2023-01-10 13:11:44 187.36278 -37.09873 14.97 unknown 2023-01-12 09:15:02 Apparently hostless bright blue transient, candidate CV http://gsaweb.ast.cam.ac.uk/alerts/alert/Gaia23afl/ ATLAS also detected: YYYYMMDD(UT) mag observer 20230109.3551 15.382o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230109.3576 15.326o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230109.3589 15.264o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230109.3603 15.211o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230110.0016 15.035o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230110.0052 15.061o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230110.0116 15.051o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230110.0171 15.021o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230110.3202 15.032o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230110.3432 15.160o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230110.3610 15.063o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505))

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[vsnet-newvar 9701] 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-newvar 9700] 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-newvar 9699] 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-newvar 9698] 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-newvar January 2023