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

[vsnet-alert 27561] Re: TCPJ06461075+2502415 brightening!
by Taichi Kato 28 Mar '23

28 Mar '23

Re: TCPJ06461075+2502415 brightening! > Sano-san has reported that this object brightened above > 15 mag and was apparently still brightening on Mar. 27. This turned out to be an error.

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[vsnet-alert 27560] ASASSN-23bx: new SU UMa-type dwarf nova
by tonny.vanmunster＠gmail.com 28 Mar '23

28 Mar '23

Dear colleagues, I have just finished analysing my unfiltered CCD observations of ASASSN-23bx, obtained on 2023, Mar 27/28 at CBA Extremadura Observatory (Spain) using a 0.40-m f/5.1 telescope and SX-46 CCD camera under clear skies. The resulting light curve clearly shows the presence of regular superhumps with a large amplitude of 0.58 mag, establishing ASASSN-23bx as a new SU UMa-type dwarf nova. A period analysis, using the ANOVA, Lomb-Scargle, Generalized-Lomb-Scargle and Conditional Entropy methods (Peranso 3.0) yields a combined superhump period of 0.0589 +/- 0.0005d. The object was at mag CV = 16.5 on Mar 28th. 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> http://www.cbabelgium.com PERANSO: The Light Curve and Period Analysis Software http://www.peranso.com

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[vsnet-alert 27559] TCPJ06461075+2502415 brightening!
by Taichi Kato 28 Mar '23

28 Mar '23

TCPJ06461075+2502415 brightening! Sano-san has reported that this object brightened above 15 mag and was apparently still brightening on Mar. 27. YYYYMMDD(UT) mag observer 20230327.4423 15.495B (Yasuo Sano) 20230327.4448 14.964V (Yasuo Sano) 20230327.4473 14.447Rc (Yasuo Sano) 20230327.4493 14.863C (Yasuo Sano) Time-resolved data did not show apparent superhumps reported by Vanmunster on Mar. 24. Such behavior is not expected in a WZ Sge after appearance of ordinary superhumps. Please continue your observations!

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[vsnet-alert 27551] ASASSN-19gp outburst?
by Taichi Kato 27 Mar '23

27 Mar '23

ASASSN-19gp outburst? YYYYMMDD(UT) mag observer 20230311.3793 15.22cG (Masao Funada) 20230312.3933 15.18cG (Masao Funada) 20230325.3442 15.39cG (Masao Funada)

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[vsnet-alert 27557] MASTER OT J174816.22+501723.3 likely superoutburst
by Taichi Kato 27 Mar '23

27 Mar '23

MASTER OT J174816.22+501723.3 likely superoutburst YYYYMMDD(UT) mag observer 20230316.6432 19.087o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230320.5546 16.551o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230320.5737 16.919o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230320.5755 16.475o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230320.5845 16.346o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230324.5974 15.925o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230324.6220 15.853o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230324.6244 15.879o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230324.6280 15.814o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230324.6285 15.943o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230324.6333 15.985o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230324.6346 15.971o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230324.6437 15.973o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505))

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[vsnet-alert 27556] ASASSN-14gu standstill?
by Taichi Kato 27 Mar '23

27 Mar '23

ASASSN-14gu standstill? YYYYMMDD(UT) mag observer 20230308.549 164C (Mitsutaka Hiraga) 20230310.2587 16.373zg (ZTF Alert DC mag (Masci+ 2019)) 20230310.5488 <155c (Yutaka Maeda) 20230313.5732 <164c (Yutaka Maeda) 20230313.6686 161C (Masayuki Moriyama) 20230314.5436 160:c (Yutaka Maeda) 20230314.6021 162C (Masayuki Moriyama) 20230315.5593 156c (Yutaka Maeda) 20230315.5593 156c (Yutaka Maeda) 20230317.1558 15.991zg (ZTF Alert DC mag (Masci+ 2019)) 20230317.2775 15.997zr (ZTF Alert DC mag (Masci+ 2019)) 20230318.6317 161C (Masayuki Moriyama) 20230319.5777 158:C (Masayuki Moriyama) Another likely standstill with IW And-type ending: YYYYMMDD(UT) mag observer 20221218.7773 161C (Masayuki Moriyama) 20221219.3434 16.103zr (Zwicky Transient Facility (Masci et al., 2019)) 20221219.4481 16.103zg (Zwicky Transient Facility (Masci et al., 2019)) 20221220.6296 <150c (Yutaka Maeda) 20221221.3447 16.067zr (Zwicky Transient Facility (Masci et al., 2019)) 20221221.4050 16.049zg (Zwicky Transient Facility (Masci et al., 2019)) 20221223.2760 16.101zr (Zwicky Transient Facility (Masci et al., 2019)) 20221223.3294 16.039zg (ZTF Alert DC mag (Masci+ 2019)) 20221223.3294 16.046zg (Zwicky Transient Facility (Masci et al., 2019)) 20221225.6126 <154c (Yutaka Maeda) 20221227.2810 15.374zg (ZTF Alert DC mag (Masci+ 2019)) 20221227.2810 15.435zg (Zwicky Transient Facility (Masci et al., 2019)) 20221227.3292 15.253zr (ZTF Alert DC mag (Masci+ 2019)) 20221227.3292 15.444zr (Zwicky Transient Facility (Masci et al., 2019)) 20221227.6888 156C (Masayuki Moriyama) 20221227.7589 155:c (Yutaka Maeda)

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[vsnet-alert 27555] NSV04734: bright dwarf nova
by Taichi Kato 27 Mar '23

27 Mar '23

NSV04734: bright dwarf nova From ATLAS data. Suntype unknown (SS Cyg? but the data are insufficient). Outburst in this March. YYYYMMDD(UT) mag observer 20230305.2120 16.042o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230305.2152 16.099o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230305.2225 15.955o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230305.2571 15.963o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230309.1595 15.054o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230309.1869 14.983o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230309.1897 15.008o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230309.2054 14.957o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230310.9411 14.066o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230310.9443 14.867o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230310.9495 13.989o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230310.9659 14.120o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230310.9668 14.063o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230310.9720 14.149o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230310.9752 13.975o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230311.0011 15.571o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230311.9208 14.298o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230311.9239 14.279o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230311.9294 14.270o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230311.9334 14.271o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230311.9366 14.271o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230311.9398 14.312o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230311.9420 14.269o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230311.9520 14.266o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230313.1821 14.666o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230313.1853 14.663o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230313.1911 14.661o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230313.2016 14.655o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230317.1721 15.713o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230317.1752 15.797o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230317.1807 15.797o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230317.1912 15.767o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230319.8292 16.174c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230319.8647 16.062c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230319.8837 16.083c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230319.8870 16.112c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230321.1827 15.832o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230321.1859 15.902o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230321.1922 15.861o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230321.2175 15.789o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230325.1233 15.836o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230325.1565 15.872o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230325.1598 15.760o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230325.1653 15.776o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 100527.5 -454241 (2000.0) ASASSN-VJ100527.57-454241.3 VAR 15.29(1.69) P=305.8166148 100527.566 -454241.39 (2000.0) Gaia_DR2_5414549894369796096 plx=1.137(0.041) dismod=9.7 pmra=-0.122(0.065) pmdec=-4.474(0.064) G=16.145 BP=16.638 RP=15.438 100527.566 -454241.40 (2000.0) Gaia_EDR3_5414549894369796096 plx=1.102(0.033) dismod=9.8 pmra=-0.119(0.035) pmdec=-4.535(0.032) G=16.106 BP=16.600 RP=15.406

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[vsnet-alert 27554] NSV03326: bright likely SU UMa star with superoutburst in this Feb.
by Taichi Kato 27 Mar '23

27 Mar '23

NSV03326: bright likely SU UMa star with superoutburst in this Feb. From ATLAS data. Superhumps were suspected. Supercyle about 85 d. Bright (13.2-17.5) and continued observations are desired. 065852.601 -462600.70 (2000.0) Gaia_DR2_5557692908000138496 plx=1.911(0.110) dismod=8.6 pmra=-1.977(0.293) pmdec=28.689(0.290) G=17.625 BP=17.810 RP=17.014 065852.601 -462600.69 (2000.0) Gaia_EDR3_5557692908000138496 plx=1.870(0.052) dismod=8.6 pmra=-1.633(0.048) pmdec=28.330(0.070) G=17.647 BP=17.848 RP=16.940

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[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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