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

[vsnet-alert 27553] NSV06517: bright likely SU UMa star with superoutburst in this Feb.
by Taichi Kato 27 Mar '23

27 Mar '23

NSV06517: bright likely SU UMa star with superoutburst in this Feb. From ATLAS data. Superhumps were suspected. (Peak to plateau data only; currently at 19.5) YYYYMMDD(UT) mag observer 20230203.3072 15.089o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230203.3104 15.078o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230203.3162 15.059o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230203.3278 15.026o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230204.0566 13.523o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230204.0602 13.510o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230204.0665 13.502o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230204.0788 13.499o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230205.0741 13.408o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230205.0794 13.414o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230205.0826 13.410o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230205.0934 13.404o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230206.3081 13.561o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230206.3170 13.563o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230206.3202 13.554o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230206.3260 13.580o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230207.3226 13.741o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230207.3253 13.711o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230207.3308 13.722o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230207.3361 13.720o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230211.1029 13.985o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230211.1128 14.050o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230211.1160 14.099o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230211.1329 14.165o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230212.2973 14.264o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230212.2988 14.272o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230212.3002 14.288o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230212.3006 14.288o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230212.3030 14.316o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230212.3034 14.333o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230212.3258 14.346o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230212.3262 14.349o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230215.0382 14.685o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230215.0400 14.683o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230215.0573 14.718o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230215.0605 14.703o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230216.2930 14.719o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230216.2959 14.777o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230216.2988 14.736o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230216.3010 14.773o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230216.3042 14.767o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230216.3046 14.761o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230216.3349 14.689o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230216.3403 14.612o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230216.3911 14.728o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230220.2920 15.139c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230220.2938 15.122c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230220.2978 15.112c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230220.3053 15.093c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505))

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[vsnet-alert 27552] NSV05909: appears to be an ER UMa star
by Taichi Kato 27 Mar '23

27 Mar '23

NSV05909: appears to be an ER UMa star From ATLAS data. The shortest interval between likely superoutbursts was 41 d. There was some sign of superhumps during the 2023 Feb. one. The next one is expected in April and observations are encouraged. Bright (15-17.5) object. 124409.5 -481332 (2000.0) ASASSN-VJ124409.55-481332.6 VAR 16.2(1.86) P=29.0231976 124409.414 -481332.99 (2000.0) Gaia_DR2_6128036660505513728 plx=1.335(0.132) dismod=9.4 pmra=-4.487(0.128) pmdec=-4.292(0.177) G=16.418 BP=16.394 RP=16.072 124409.414 -481332.99 (2000.0) Gaia_EDR3_6128036660505513728 plx=1.096(0.047) dismod=9.8 pmra=-4.450(0.046) pmdec=-4.663(0.041) G=16.185 BP=16.255 RP=15.948

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[vsnet-alert 27550] ASASSN-15ku: new SU UMa-type dwarf nova
by Taichi Kato 26 Mar '23

26 Mar '23

ASASSN-15ku: new SU UMa-type dwarf nova Tamas Tordai has reported observations. The object shows 0.2-mag superhumps with a period of 0.07 d.

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[vsnet-alert 27549] 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-alert 27548] 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-alert 27547] 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-alert 27546] 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-alert 27545] 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-alert 27544] 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-alert 27543] 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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