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

[vsnet-alert 27312] FL Psc outburst?
by Taichi Kato 13 Jan '23

13 Jan '23

FL Psc outburst? Outburst in 2004. YYYYMMDD(UT) mag observer 20230104.4706 <146c (Yutaka Maeda) 20230107.5347 <147c (Yutaka Maeda) 20230110.5801 159:C (Masayuki Moriyama)

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[vsnet-alert 27311] HH Cnc long outburst
by Taichi Kato 13 Jan '23

13 Jan '23

HH Cnc long outburst Longest and brightest outburst ever, although past observations of a long outburst did not detect superhumps. YYYYMMDD(UT) mag observer 20221218.2008 <183C (Masao Funada) 20221225.7450 135cG (Yutaka Maeda) 20221227.6794 136cG (Yutaka Maeda) 20221231.6711 140cG (Yutaka Maeda) 20221231.7993 145C (Masayuki Moriyama) 20230101.0376 13.98C (Masao Funada) 20230102.6436 142:cG (Yutaka Maeda) 20230102.6437 142:cG (Yutaka Maeda) 20230102.7576 146C (Masayuki Moriyama) 20230103.583 146C (Mitsutaka Hiraga) 20230104.1945 14.04C (Masao Funada) 20230104.7743 14.34C (Masayuki Moriyama) 20230107.8946 145C (Masayuki Moriyama) 20230109.6875 139:c (Yutaka Maeda) 20230110.6695 143:cG (Yutaka Maeda) 20230110.6696 143:cG (Yutaka Maeda)

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[vsnet-alert 27310] RX Cha outburst
by Taichi Kato 13 Jan '23

13 Jan '23

RX Cha outburst Genuine superoutburst has not been observed recently. YYYYMMDD(UT) mag observer 20221214.3125 <177C (Masao Funada) 20230111.521 146 (Rod Stubbings) 20230112.526 147 (Rod Stubbings)

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[vsnet-alert 27309] 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-alert 27308] 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-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 January 2023