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

[vsnet-newvar 9914] CRTSJ153023.6+220646: polar
by Taichi Kato 26 Mar '23

26 Mar '23

CRTSJ153023.6+220646: polar Bright since 2022 Aug. in ATLAS data. 1.2-mag variation (single maximum) in high state. Porb=0.0544372 d.

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[vsnet-newvar 9913] HH Cnc: long outburst mimicking a superoutburst?
by Taichi Kato 26 Mar '23

26 Mar '23

HH Cnc: long outburst mimicking a superoutburst? Porb=0.1846 d. 2022 Dec.-2023 Jan. bright outburst. Possible rebrightening. YYYYMMDD(UT) mag observer 20230125.5325 17.528o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230125.5590 17.687o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230125.5620 17.654o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230125.5896 17.572o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230126.6320 17.940o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230126.6352 17.792o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230126.6412 17.794o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230126.6511 17.750o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230130.6388 152:cG (Yutaka Maeda) 20230202.6391 <153c (Yutaka Maeda) No definite superhumps were recorded (Itoh-san and Josch Hambsch).

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[vsnet-newvar 9912] ASASSN-23bx: looks likely a superoutburst
by Taichi Kato 26 Mar '23

26 Mar '23

ASASSN-23bx: looks likely a superoutburst YYYYMMDD(UT) mag observer 20230317.2937 14.993zr (ZTF Alert DC mag (Masci+ 2019)) 20230318.9279 15.038c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230318.9310 15.077c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230318.9366 15.065c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230318.9466 15.251c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230320.1730 15.681o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230320.1823 15.677o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230320.1856 15.663o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230320.1974 15.653o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230322.9645 15.838c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230322.9697 15.944c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230322.9729 15.943c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230322.9986 15.864c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230324.1076 16.067o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230324.1109 16.138o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230324.1141 16.199o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230324.1195 16.122o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505))

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[vsnet-newvar 9911] ASASSN-23bw looks likely a superoutburst
by Taichi Kato 26 Mar '23

26 Mar '23

ASASSN-23bw: looks likely a superoutburst YYYYMMDD(UT) mag observer 20230312.3198 15.207o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230312.3230 15.204o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230312.3283 15.245o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230312.3400 15.238o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230314.9467 15.731o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230314.9531 15.765o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230314.9590 15.734o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230316.1860 15.700o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230316.1892 15.705o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230316.1933 15.751o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230316.2149 15.905o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230318.9750 16.065c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230319.0106 15.955c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230319.0391 16.104c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230319.0428 15.965c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230320.2854 16.240o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230320.2906 16.290o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230320.2940 16.381o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230320.3152 16.413o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230322.9459 16.459c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230322.9482 16.571c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230322.9503 16.575c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230322.9507 16.510c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230322.9531 16.527c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230322.9584 16.625c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230324.1939 16.888o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230324.1962 16.864o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230324.1989 16.924o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505))

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[vsnet-newvar 9910] ASASSN-23bq: looks likely a superoutburst
by Taichi Kato 26 Mar '23

26 Mar '23

ASASSN-23bq: looks likely a superoutburst YYYYMMDD(UT) mag observer 20230311.9682 15.896o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230311.9710 15.929o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230311.9724 15.917o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230311.9880 16.110o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230312.0043 16.038o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230312.0099 16.036o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230312.0103 16.054o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230313.2812 16.147o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230313.2831 16.121o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230313.2885 16.164o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230313.2962 16.101o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230317.2872 16.484o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230317.2903 16.439o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230317.2958 16.507o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230317.3013 16.474o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230319.9979 16.765c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230320.0010 16.730c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230320.0064 16.782c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230320.0278 16.822c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230321.3217 16.790o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230321.3254 16.785o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230321.3479 16.719o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505))

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[vsnet-newvar 9909] NSVS6625418: IW And star
by Taichi Kato 26 Mar '23

26 Mar '23

NSVS6625418: IW And star Using ATLAS+ZTF data, this object is confirmed to be an IW And star. Clear outburst from standstill in 2020. (Also likely outburst from standstill and subsequent dip, but observations discontinued due to the solar conjunction). Currently dwarf nova phase.

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[vsnet-newvar 9908] CRTSJ145502.2+143815 unusual light curve during the 2022 outburst
by Taichi Kato 26 Mar '23

26 Mar '23

CRTSJ145502.2+143815 unusual light curve during the 2022 outburst Using ZTF and ATLAS data, I noticed that the 2022 June-July lasted nearly 40 days. There were two dips during the outburst, resembling some of WZ Sge stars. Time-resolved photometry on June 21 and 23 by Tonny Vanmunster did not detect short-period superhumps as expected from the outburst light curve. Vanmunster's nightly observations were an order of 0.15 d but with slow variations. This object may have showed long-period superhumps (above the period gap). ATLAS data seem to have shown some degree of superhump-like variations.

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[vsnet-newvar 9907] SDSSJ075059.97+141150.1 outburst
by Taichi Kato 25 Mar '23

25 Mar '23

SDSSJ075059.97+141150.1 outburst Porb=0.093165454 d and eclipsing. Could be a superoutburst. YYYYMMDD(UT) mag observer 20230305.6022 <154c (Yutaka Maeda) 20230306.6288 <152c (Yutaka Maeda) 20230308.6291 <153c (Yutaka Maeda) 20230310.2743 18.730zg (ZTF Alert DC mag (Masci+ 2019)) 20230313.6063 <158c (Yutaka Maeda) 20230314.2084 18.635zg (ZTF Alert DC mag (Masci+ 2019)) 20230314.5766 <160c (Yutaka Maeda) 20230315.5924 <161c (Yutaka Maeda) 20230318.5772 <156C (Masayuki Moriyama) 20230325.826 160C (Jeremy Shears)

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[vsnet-newvar 9906] Re: ZTF23aaaatwl: still on fading tail (AM CVn)
by Taichi Kato 25 Mar '23

25 Mar '23

Re: ZTF23aaaatwl: still on fading tail (AM CVn) This was PNVJ06245297+0208207 (already well observed by us).

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[vsnet-newvar 9905] ZTF23aaaatwl: still on fading tail (AM CVn)
by Taichi Kato 25 Mar '23

25 Mar '23

ZTF23aaaatwl: still on fading tail (AM CVn) See ATel #15962 (AM CVn) YYYYMMDD(UT) mag observer 20230313.7829 17.297c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230313.7861 17.273c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230313.7920 17.338c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230313.8046 17.375c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230315.0235 17.072o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230315.0303 17.209o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230315.0336 17.113o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230315.0436 17.120o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230317.2695 16.995o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230317.2744 16.954o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230317.2776 17.015o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230317.3002 17.059o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230317.7699 17.196c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230317.7731 17.136c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230317.7785 17.173c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230317.7992 17.198c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230319.0482 17.173o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230319.0513 17.101o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230319.0568 17.049o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230319.0924 17.097o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230320.7819 17.490c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230320.7850 17.358c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230320.8036 17.536c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230321.2643 17.186o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230321.2675 17.071o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230321.2729 17.145o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230321.2964 17.155o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230321.7596 17.541c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230321.7632 17.499c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230321.7705 17.548c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230321.7805 17.433c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230323.0263 17.548o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230323.0295 17.412o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230323.0350 17.341o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230323.0464 17.349o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230325.2361 17.246o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230325.2402 17.340o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230325.2466 17.252o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) Around the peak: YYYYMMDD(UT) mag observer 20230127.1200 12.877o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230127.1232 12.901o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230127.1295 12.837o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230127.1408 12.846o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) Once faded 20230131.1028 13.240o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230131.1060 13.254o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230131.1114 13.235o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230131.1468 13.240o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505))

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vsnet-newvar March 2023