January 2023 - vsnet-campaign-dn - ooruri.kusastro.kyoto-u.ac.jp

[vsnet-campaign-dn 16847] Gaia23afl
by Taichi Kato 12 Jan '23

12 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-campaign-dn 16846] ASASSN-22oh: WZ Sge star below the period minimum
by Taichi Kato 12 Jan '23

12 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-campaign-dn 16845] PNVJ00215475+5231007: WZ Sge star
by Taichi Kato 12 Jan '23

12 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-campaign-dn 16844] PNVJ00215475+5231007: likely WZ Sge star
by Taichi Kato 11 Jan '23

11 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-campaign-dn 16843] NSV13146: IW And star
by Taichi Kato 10 Jan '23

10 Jan '23

NSV13146: IW And star Using ATLAS forced photometry (Tonry et al. 2018; Shingles et al. 2021), I found that this object all variety of different states of an IW And star.

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[vsnet-campaign-dn 16842] ASASSN-22oh: no strong evidence for early superhumps
by Taichi Kato 10 Jan '23

10 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-campaign-dn 16841] PNVJ06245297+0208207: further fading
by Taichi Kato 10 Jan '23

10 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-campaign-dn 16840] LP Vul: IW And star
by Taichi Kato 10 Jan '23

10 Jan '23

LP Vul: IW And star Using ATLAS forced photometry (Tonry et al. 2018; Shingles et al. 2021), I found that this object typical IW And behavior in 2022 June-Sep.

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[vsnet-campaign-dn 16839] Gaia DR3 6134636930031090560 = ASASSN-23ab
by Taichi Kato 10 Jan '23

10 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-campaign-dn 16838] ASASSN-14im outburst
by Taichi Kato 10 Jan '23

10 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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