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

[vsnet-alert 27708] Re: AR UMa bright state (polar)
by Taichi Kato 03 May '23

03 May '23

Re: AR UMa bright state (polar) Still bright. YYYYMMDD(UT) mag observer 20230426.2591 14.269o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230426.2609 14.298o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230426.2827 14.136o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230426.2868 14.300o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230502.3378 14.192o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230502.3409 13.951o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230502.3464 13.908o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) See (historical) references: https://ui.adsabs.harvard.edu/abs/1996ApJ...473..483S/abstract https://ui.adsabs.harvard.edu/abs/1994ApJ...426..288R/abstract https://ui.adsabs.harvard.edu/abs/1993IBVS.3890....1W/abstract

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[vsnet-alert 27707] Re: PTF1J071912.13+485834.0 superoutburst (AM CVn)
by Taichi Kato 03 May '23

03 May '23

Re: PTF1J071912.13+485834.0 superoutburst (AM CVn) The peak was already in April. YYYYMMDD(UT) mag observer 20230407.4857 <157c (Yutaka Maeda) 20230408.4957 <155c (Yutaka Maeda) 20230409.5123 <162c (Yutaka Maeda) 20230410.3050 19.183o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230410.4829 <156c (Yutaka Maeda) 20230411.2455 19.501zr (ZTF Alert DC mag (Masci+ 2019)) 20230412.2710 19.176c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230412.5146 <160c (Yutaka Maeda) 20230415.1987 19.493zr (ZTF Alert DC mag (Masci+ 2019)) 20230415.5492 <150c (Yutaka Maeda) 20230416.5857 <167C (Masayuki Moriyama) 20230417.4964 <158c (Yutaka Maeda) 20230421.1833 18.261zg (ZTF Alert DC mag (Masci+ 2019)) 20230421.2033 18.232zr (ZTF Alert DC mag (Masci+ 2019)) 20230421.5104 <145c (Yutaka Maeda) 20230422.2421 17.105c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230422.2461 17.014c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230422.2515 16.955c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230422.2688 16.910c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230422.4941 <153c (Yutaka Maeda) 20230424.2360 15.925c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230424.2391 15.914c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230424.2448 15.974c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230424.2549 15.957c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230426.4903 <157c (Yutaka Maeda) 20230426.5346 <170C (Masayuki Moriyama) 20230427.5192 <156c (Yutaka Maeda) 20230430.4981 <158c (Yutaka Maeda) 20230501.1840 16.320zg (ZTF Alert DC mag (Masci+ 2019)) 20230501.2044 16.535zr (ZTF Alert DC mag (Masci+ 2019)) 20230501.5083 <155c (Yutaka Maeda) 20230501.5391 166:C (Masayuki Moriyama) 20230502.2701 16.842o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230502.2936 17.028o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230502.2968 16.865o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021))

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[vsnet-alert 27706] AR UMa bright state (polar)
by Taichi Kato 03 May '23

03 May '23

AR UMa bright state (polar) Long bright state probably first time since the 1990s. (Short brightening in 2021 May). Orbital modulations (as a polar) are very apparent and would be an interesting target. YYYYMMDD(UT) mag observer 20230221.7088 141cG (Yutaka Maeda) 20230226.5112 14.230g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230304.5086 14.143g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230305.1381 14.373g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230317.3885 14.041g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230318.3331 14.296g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230323.2519 14.278g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230325.4920 14.325g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230405.2185 14.356g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230410.3923 14.290g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230411.1975 14.519g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230412.4029 13.997g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230414.4357 14.272g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230415.8972 <146 (Jose Ripero) 20230416.3169 14.171g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230416.9056 <146 (Jose Ripero) 20230417.3071 14.178g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230419.2210 13.974g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230422.3850 14.095g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230425.2669 14.273g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230426.2239 13.946g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014))

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[vsnet-alert 27705] MASTER OT J131320.24+692649.1 superoutburst
by Taichi Kato 03 May '23

03 May '23

MASTER OT J131320.24+692649.1 superoutburst Known SU UMa star. YYYYMMDD(UT) mag observer 20230426.517 <176C (Mitsutaka Hiraga) 20230426.5733 <160c (Yutaka Maeda) 20230427.6008 <145c (Yutaka Maeda) 20230430.5811 156c (Yutaka Maeda) 20230430.5812 156c (Yutaka Maeda) 20230501.5908 151cG (Yutaka Maeda) 20230501.5908 151cG (Yutaka Maeda) 20230501.7604 15.43C (Masayuki Moriyama) 20230502.4630 15.370g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014))

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[vsnet-alert 27704] PTF1J071912.13+485834.0 superoutburst (AM CVn)
by Taichi Kato 03 May '23

03 May '23

PTF1J071912.13+485834.0 superoutburst (AM CVn) YYYYMMDD(UT) mag observer 20230430.4981 <158c (Yutaka Maeda) 20230501.1840 16.320zg (ZTF Alert DC mag (Masci+ 2019)) 20230501.2044 16.535zr (ZTF Alert DC mag (Masci+ 2019)) 20230501.5083 <155c (Yutaka Maeda) 20230501.5391 166:C (Masayuki Moriyama)

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[vsnet-alert 27703] Gaia23bql: WZ Sge star 1 month past the peak?
by Taichi Kato 03 May '23

03 May '23

Gaia23bql: WZ Sge star 1 month past the peak? http://gsaweb.ast.cam.ac.uk/alerts/alert/Gaia23bql/ Gaia23bql AT2023hng 2023-04-25 12:41:42 175.88031 -70.17583 17.32 unknown 2023-05-02 08:40:30 Apparently hostless transient There may have been a dip on Apr. 29 in ATLAS data. YYYYMMDD(UT) mag observer 20230407.1642 15.923o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230407.1673 16.047o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230407.1728 16.001o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230407.1848 15.872o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230411.9198 16.387o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230411.9226 16.307o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230411.9283 16.386o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230411.9384 16.432o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230413.0391 16.818c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230413.0419 16.671c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230413.0481 16.643c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230413.0602 16.691c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230414.9051 17.291o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230414.9079 16.913o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230414.9137 16.655o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230414.9238 16.744o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230417.9100 16.940o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230417.9130 16.965o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230417.9183 16.861o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230417.9286 16.873o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230419.1451 17.104c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230419.1484 17.038c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230419.1544 17.082c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230419.1663 17.055c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230425.2693 17.287c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230425.2721 17.318c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230425.2987 17.446c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230425.3043 17.566c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230426.8858 17.385o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230426.8888 17.436o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230426.8986 17.453o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230426.9051 17.633o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230429.8782 18.112o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230429.8843 18.673o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230429.8942 18.325o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230501.1772 17.992o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230501.2005 17.998o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230501.2166 18.100o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021))

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[vsnet-alert 27702] ASASSN-23dk ATLAS detection
by Taichi Kato 03 May '23

03 May '23

ASASSN-23dk ATLAS detection The fading rate may suggest a WZ Sge star. YYYYMMDD(UT) mag observer 20230428.7825 15.219o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230428.8055 15.202o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230428.8250 15.142o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230501.7545 15.576o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230501.7582 15.596o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230501.7657 15.595o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021))

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[vsnet-alert 27701] ASASSN-23dl ATLAS detection
by Taichi Kato 03 May '23

03 May '23

ASASSN-23dl ATLAS detection YYYYMMDD(UT) mag observer 20230429.8682 16.520o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230429.8716 16.525o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230429.8778 16.527o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230429.8876 16.565o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230501.1758 16.688o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230501.1801 16.731o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230501.1857 16.673o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230501.1959 16.771o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021))

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[vsnet-alert 27700] TCP J16064415-1611467: new WZ Sge-type dwarf nova
by Taichi Kato 03 May '23

03 May '23

TCP J16064415-1611467: new WZ Sge-type dwarf nova The most recent data by Itoh-san on May 2 (longer run than in the past) seem to show apparent early superhumps. Only the initial data (vsnet-alert 27686) appears to be anomalous. The combined data with Hambsch's (but not ver helpful) has yielded a period of 0.05633(5) d, characteristic double peaks and a full amplitude of 0.07 mag.

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[vsnet-alert 27699] ASASSN-22ak: sign of superhump?
by Taichi Kato 03 May '23

03 May '23

ASASSN-22ak: sign of superhump? Josch Hambsch has reported observations. 0.3-mag variations were recorded. The suspected superhump period appears to be longer than the one suspected in 2022 Nov (and longer than that of an AM CVn star). Please continue observations of this very unusual object.

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