April 2023 - vsnet-alert - ooruri.kusastro.kyoto-u.ac.jp

[vsnet-alert 27614] ASASSN-18jq: possible SU UMa star
by Taichi Kato 11 Apr '23

11 Apr '23

ASASSN-18jq: possible SU UMa star Rebrightening. YYYYMMDD(UT) mag observer 20230305.3804 17.835o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230305.3845 18.451o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230305.3912 17.997o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230305.4026 17.577o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230309.3318 15.431o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230309.3436 15.424o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230309.3568 15.403o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230309.3596 15.378o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230313.3807 14.971o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230313.3875 14.995o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230313.3916 14.960o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230313.4060 14.884o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230317.3789 15.126o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230317.3915 15.173o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230317.3938 15.179o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230317.3997 15.195o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230320.0724 15.319c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230320.0756 15.298c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230320.0920 15.373c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230320.1076 15.362c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230321.3725 15.658o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230321.3766 15.672o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230321.3951 15.666o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230321.4112 15.591o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230325.2600 17.475o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230325.2627 17.455o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230325.2816 177C (Masao Funada) 20230325.2876 17.617o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230325.2927 17.508o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230328.0578 16.709c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230328.0934 16.645c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230328.0977 16.710c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230328.1029 16.801c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230329.3160 17.509o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230329.3369 17.402o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230329.3397 17.477o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230329.3452 17.590o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230401.2657 18.428o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230401.2676 18.585o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230401.2703 18.512o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230401.2754 18.566o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230403.1131 18.998o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230403.1159 18.997o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230403.1214 18.803o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230406.0792 18.314o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230406.0829 18.618o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230406.1145 18.240o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230409.3122 173C (Masao Funada)

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[vsnet-alert 27613] CRTS J090516.0+120451 superhump period
by Taichi Kato 11 Apr '23

11 Apr '23

CRTS J090516.0+120451 superhump period Itoh-san also detected superhumps before Vanmunster's observations (would better be credited). The combined data yielded a period of 0.0623(2) d.

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[vsnet-alert 27612] ASASSN-15dq: early superhumps or growing ordinary superhumps?
by Taichi Kato 11 Apr '23

11 Apr '23

ASASSN-15dq: early superhumps or growing ordinary superhumps? Itoh-san has reported observations Apr. 10. The profile of superhumps somewhat resembled that of early superhumps. This also may be a signature of growing superhumps. The outbursts have been rare (first since 2015) and the outburst amplitude is large for this period (0.08 d) and there may be a possibility of a long-Porb WZ Sge star. Further observations are encouraged.

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[vsnet-alert 27611] CRTS J090516.0+120451 (aka CSS 091022:090516+120451): new SU UMa-type dwarf nova
by tonny.vanmunster＠gmail.com 11 Apr '23

11 Apr '23

Dear colleagues, I have just finished analysing my unfiltered CCD observations of CRTS J090516.0+120451 obtained on 2023, Apr 10/11 at CBA Extremadura Observatory (Spain) using a 0.40-m f/5.1 telescope and SX-46 CCD camera under relatively clear skies. My observations were triggered by vsnet-alert 27609. The resulting light curve clearly shows the presence of regular superhumps with an amplitude of 0.39 mag, establishing CRTS J090516.0+120451 as a new SU UMa-type dwarf nova. A period analysis, using the ANOVA, Generalized-Lomb-Scargle, PDM and Conditional Entropy methods (Peranso 3.0) yields a combined superhump period of 0.0645 +/- 0.0024d. The object was at mag CV = 15.7 on Apr 11th. 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 27610] Wils_SDSSJ080306.99+284855.8 superoutburst
by Taichi Kato 10 Apr '23

10 Apr '23

Wils_SDSSJ080306.99+284855.8 superoutburst YYYYMMDD(UT) mag observer 20230331.5855 <154c (Yutaka Maeda) 20230402.4976 <152c (Yutaka Maeda) 20230404.0488 16.210o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230404.0492 15.992o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230404.0534 16.006o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230404.0543 15.902o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230404.0640 16.088o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230404.0644 15.656o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230404.0700 15.621o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230405.3325 16.121o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230405.3485 16.226o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230405.3517 16.303o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230407.3038 16.421o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230407.3067 16.424o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230407.3122 16.411o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230407.3223 16.374o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230408.5323 159:c (Yutaka Maeda) 20230408.5323 159:c (Yutaka Maeda) 20230409.2698 16.492o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230409.2730 16.473o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230409.2787 16.471o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230409.2893 16.431o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505))

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[vsnet-alert 27609] CRTS J090516.0+120451 recent data
by Taichi Kato 10 Apr '23

10 Apr '23

CRTS J090516.0+120451 recent data ATLAS caught this outburst. YYYYMMDD(UT) mag observer 20230326.3301 19.200o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230326.6100 <149c (Yutaka Maeda) 20230326.6304 <173C (Masayuki Moriyama) 20230327.3206 19.251o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230327.3235 19.331o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230327.6277 <149c (Yutaka Maeda) 20230328.6433 <158c (Yutaka Maeda) 20230331.6067 <154c (Yutaka Maeda) 20230402.6029 <146c (Yutaka Maeda) 20230403.5667 <155c (Yutaka Maeda) 20230407.5425 <148c (Yutaka Maeda) 20230408.0981 16.871o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230408.1013 16.945o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230408.1076 16.938o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230408.5538 150:cG (Yutaka Maeda)

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[vsnet-alert 27608] ASASSN-18mw: precursor + outburst = possible superoutburst
by Taichi Kato 10 Apr '23

10 Apr '23

ASASSN-18mw: precursor + outburst = possible superoutburst Time-resolved observations are encouraged. YYYYMMDD(UT) mag observer 20230321.3823 18.655o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230321.3855 18.856o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230321.4033 18.598o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230321.4121 18.541o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230325.2932 18.416o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230325.2960 18.364o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230325.2988 18.147o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230325.3062 18.691o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230325.3113 18.380o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230328.1333 15.921c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230328.1448 15.927c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230328.1516 15.933c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230328.1538 15.960c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230329.3838 17.663o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230329.3947 17.537o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230329.3995 17.707o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230329.4010 17.652o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230329.4060 17.629o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230329.4080 17.536o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230401.2837 18.033o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230401.2990 18.026o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230401.3073 18.011o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230403.1210 17.899o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230403.1242 17.996o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230403.1307 18.164o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230403.1497 18.241o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230406.0995 16.435o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230406.1024 16.390o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230408.2124 15.16cG (Masao Funada)

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[vsnet-alert 27607] ASASSN-15dq superoutburst
by Taichi Kato 10 Apr '23

10 Apr '23

ASASSN-15dq superoutburst YYYYMMDD(UT) mag observer 20230326.4430 <152c (Yutaka Maeda) 20230327.1182 18.354o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230328.4727 <158c (Yutaka Maeda) 20230402.4347 <147c (Yutaka Maeda) 20230406.9332 16.247o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230406.9412 16.159o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230406.9462 16.102o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230406.9595 16.088o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230407.4537 140:c (Yutaka Maeda) 20230408.4619 142cG (Yutaka Maeda)

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[vsnet-alert 27606] CRTS J090516.0+120451 please check
by Taichi Kato 10 Apr '23

10 Apr '23

CRTS J090516.0+120451 please check Brughtest outburst, if confirmed. YYYYMMDD(UT) mag observer 20230402.6029 <146c (Yutaka Maeda) 20230403.5667 <155c (Yutaka Maeda) 20230407.5425 <148c (Yutaka Maeda) 20230408.5538 150:cG (Yutaka Maeda)

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[vsnet-alert 27605] CRTS J063437.9+412047 possible superoutburst
by Taichi Kato 10 Apr '23

10 Apr '23

CRTS J063437.9+412047 possible superoutburst But faint. Known SU UMa star. YYYYMMDD(UT) mag observer 20230403.490 <175C (Mitsutaka Hiraga) 20230407.494 <173C (Mitsutaka Hiraga) 20230408.5790 162C (Masayuki Moriyama) 20230409.5819 163C (Masayuki Moriyama)

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