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

[vsnet-campaign-dn 17077] 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-campaign-dn 17076] 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-campaign-dn 17075] 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-campaign-dn 17074] 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-campaign-dn 17073] 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-campaign-dn 17072] 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-campaign-dn 17071] TCP J06461075+2502415: new WZ Sge-type dwarf nova
by tonny.vanmunster＠gmail.com 25 Mar '23

25 Mar '23

Dear colleagues, I have just finished analysing my unfiltered CCD observations of TCP J06461075+2502415, obtained on Mar 24/25, 2023 at CBA Extremadura Observatory (Spain), using a 0.40-m f/5.1 telescope and SX-46 CCD camera under moderate skies. I have been observing this object for multiple nights since its discovery announcement on Mar 14, 2023 by Yuji Nakamura. On all previous nights, no obvious modulations were visible in the light curve. TCP J06461075+2502415 finally started showing superhumps on Mar 24/25, 2023. The superhumps have an amplitude of 0.26 mag. A period analysis using the ANOVA, Lomb-Scargle, Generalized-Lomb-Scargle and PDM methods (Peranso 3.0), yields a combined superhump period of 0.0592 +/- 0.0012d. The object was at mag CV = 16.0 on Mar 24th. The superhump profile shows no signs of a double-waved pattern, but the large outburst amplitude, combined with the long time for superhumps to develop (approx. 10 days) are strong signatures of a WZ Sge-type dwarf nova. Follow-up observations are recommended to further track the evolution of the superhumps. I will send my observations to AAVSO, CBA and VSNET for further analysis. Best regards Tonny --- Tonny Vanmunster CBA Belgium Observatory CBA Extremadura Observatory http://www.cbabelgium.com PERANSO : The Light Curve and Period Analysis Software http://www.peranso.com

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[vsnet-campaign-dn 17070] ASASSN-VJ090756.65+715859.5: IW And
by Taichi Kato 25 Mar '23

25 Mar '23

ASASSN-VJ090756.65+715859.5: IW And From ZTF data.

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[vsnet-campaign-dn 17069] NSVS6625418: bright Z Cam star
by Taichi Kato 25 Mar '23

25 Mar '23

NSVS6625418: bright Z Cam star From ZTF data. 13.4-16.6. https://www.aavso.org/vsx/index.php?view=detail.top&oid=227663

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[vsnet-campaign-dn 17068] CC Cnc: slowly rising outburst
by Taichi Kato 25 Mar '23

25 Mar '23

CC Cnc: slowly rising outburst Superoutburst in 2022 Oct.-Nov. YYYYMMDD(UT) mag observer 20230312.8639 17.665o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230312.8671 17.605o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230312.8735 17.729o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230312.8839 17.653o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230313.6247 <161c (Yutaka Maeda) 20230313.6829 <169C (Masayuki Moriyama) 20230313.8194 <141 (Eddy Muyllaert) 20230314.0827 18.321o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230314.0911 18.100o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230314.0938 17.993o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230314.1012 18.032o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230314.1045 18.282o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230314.1125 18.002o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230314.4190 18.039o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230314.4222 18.210o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230314.4276 18.254o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230314.4380 18.421o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230314.5949 <157c (Yutaka Maeda) 20230314.597 181C (Mitsutaka Hiraga) 20230314.6593 <173C (Masayuki Moriyama) 20230314.891 <156 (Gary Poyner) 20230315.3485 18.761o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230315.3522 18.617o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230315.3576 18.574o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230315.3678 18.520o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230315.6110 <159c (Yutaka Maeda) 20230316.9054 18.130c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230316.9156 17.855c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230316.974 <149 (Gary Poyner) 20230318.0766 17.953o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230318.0858 17.472o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230318.0890 18.123o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230318.0926 17.892o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230318.0948 17.543o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230318.1296 17.578o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230318.1300 17.477o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230318.3404 18.059o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230318.3438 17.715o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230318.3493 17.767o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230318.3619 17.791o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230318.9118 <141 (Eddy Muyllaert) 20230319.024 <156 (Gary Poyner) 20230319.0618 170C (Masao Funada) 20230319.062 17.21C (Gary Poyner) 20230319.2372 17.609o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230319.2390 17.822o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230319.2422 17.574o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230319.2508 17.552o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230319.5944 166C (Masayuki Moriyama) 20230321.8590 <141 (Eddy Muyllaert) 20230322.0839 15.795o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230322.0866 15.836o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230322.0924 15.641o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230322.1022 15.530o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230323.017 <149 (Gary Poyner) 20230323.458 146 (Rod Stubbings) 20230325.467 153 (Rod Stubbings)

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