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

[vsnet-alert 27525] MGAB-V319 likely superoutburst, but fading
by Taichi Kato 19 Mar '23

19 Mar '23

MGAB-V319 likely superoutburst, but fading Gaia detection of the present outburst. Relatively frequent superoutbursts in ATLAS data. YYYYMMDD(UT) mag observer 20230308.7711 17.680o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230308.7743 17.694o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230310.0374 16.997o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230310.0484 17.117o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230310.0510 17.222o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230310.0563 17.030o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230311.3246 16.668o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230311.3506 17.047o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230312.7807 17.004c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230312.7844 16.926c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230312.7900 16.956c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230312.8040 17.025c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230312.8290 17.054c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230314.0197 17.231o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230314.0223 17.207o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230314.0383 17.222o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230314.0443 17.273o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230315.3284 17.350o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230315.3311 17.336o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230315.3372 17.408o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230315.3471 17.257o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230318.0108 17.648o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230318.0149 17.568o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230318.0231 17.628o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230318.0404 17.577o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230318.3278 17.516o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230318.3310 17.633o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230318.3365 17.471o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505))

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[vsnet-alert 27524] NSV 3240 superoutburst and now fading
by Taichi Kato 18 Mar '23

18 Mar '23

NSV 3240 superoutburst and now fading YYYYMMDD(UT) mag observer 20230226.7100 <171C (Masayuki Moriyama) 20230306.0437 15.531o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230306.0469 15.518o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230306.0643 15.421o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230306.0754 15.491o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230306.3090 15.710o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230306.3118 15.652o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230306.3174 15.687o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230306.3282 15.669o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230308.7720 15.729o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230310.0526 15.649o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230310.0552 15.710o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230310.0650 15.722o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230310.0753 15.742o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230311.3246 15.953o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230311.3282 15.873o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230311.3333 15.891o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230311.3506 15.883o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230312.7807 15.988c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230312.7844 16.006c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230312.7900 16.024c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230312.7909 16.031c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230312.8027 16.030c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230312.8040 16.095c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230312.8142 16.024c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230312.8290 15.928c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230312.8299 15.931c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230313.6669 164C (Masayuki Moriyama) 20230314.0213 16.588o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230314.0246 16.551o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230314.0388 16.521o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230314.0452 16.520o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230314.5972 173C (Masayuki Moriyama) 20230315.3165 18.083o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230315.3197 17.979o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230315.3252 18.001o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230315.3354 17.870o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505))

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[vsnet-alert 27523] Wils_SDSSJ075107.50+300628.4 superhump period
by Taichi Kato 18 Mar '23

18 Mar '23

Wils_SDSSJ075107.50+300628.4 superhump period Itoh-san has reported observations. Superhumps have been present at least since Mar. 10. The period is 0.05798(1) d (based on the alias selection in 2013).

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[vsnet-alert 27522] ASASSN-23bn superhumps
by Taichi Kato 18 Mar '23

18 Mar '23

ASASSN-23bn superhumps Peter Starr's observations on Mar. 16 showed a 0.2-mag superhump.

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[vsnet-alert 27521] AT Cnc standstill
by Taichi Kato 17 Mar '23

17 Mar '23

AT Cnc standstill Somewhat atypical start of a standstill. YYYYMMDD(UT) mag observer 20230214.8465 134 (Eddy Muyllaert) 20230214.903 134 (Gary Poyner) 20230215.6609 134cG (Yutaka Maeda) 20230215.7441 137C (Masayuki Moriyama) 20230215.778 137CV (Klaus Wenzel) 20230215.8465 134 (Eddy Muyllaert) 20230215.917 133 (Gary Poyner) 20230216.7083 137C (Masayuki Moriyama) 20230216.9396 <140 (Jose Ripero) 20230217.476 <126 (Tsuneo Horie) 20230219.8590 142 (Eddy Muyllaert) 20230220.753 139 (Klaus Wenzel) 20230221.458 <126 (Tsuneo Horie) 20230221.6226 134cG (Yutaka Maeda) 20230221.785 137V (Klaus Wenzel) 20230223.469 <134 (Tsuneo Horie) 20230224.6180 143:cG (Yutaka Maeda) 20230224.928 146 (Gary Poyner) 20230224.9451 <140 (Jose Ripero) 20230225.6342 145cG (Yutaka Maeda) 20230225.6809 145C (Masayuki Moriyama) 20230225.783 145CV (Klaus Wenzel) 20230225.8660 145 (Eddy Muyllaert) 20230225.901 145 (Gary Poyner) 20230226.465 <134 (Tsuneo Horie) 20230226.5788 140cG (Yutaka Maeda) 20230226.630 144 (Hiroyuki Maehara) 20230226.7447 14.25C (Masayuki Moriyama) 20230226.8604 141 (Eddy Muyllaert) 20230227.451 <126 (Tsuneo Horie) 20230227.5810 132cG (Yutaka Maeda) 20230227.5810 132cG (Yutaka Maeda) 20230228.453 132 (Tsuneo Horie) 20230228.790 131CV (Klaus Wenzel) 20230228.8271 131 (Eddy Muyllaert) 20230301.8757 132 (Eddy Muyllaert) 20230302.503 <126 (Tsuneo Horie) 20230302.6154 133cG (Yutaka Maeda) 20230302.6155 133cG (Yutaka Maeda) 20230302.7045 137C (Masayuki Moriyama) 20230302.776 136CV (Klaus Wenzel) 20230304.6051 <141c (Yutaka Maeda) 20230305.6217 134cG (Yutaka Maeda) 20230305.6217 134cG (Yutaka Maeda) 20230306.6483 136cG (Yutaka Maeda) 20230307.458 <121 (Tsuneo Horie) 20230307.6388 135cG (Yutaka Maeda) 20230307.6388 135cG (Yutaka Maeda) 20230307.842 135 (Gary Poyner) 20230308.6487 133cG (Yutaka Maeda) 20230310.6006 133cG (Yutaka Maeda) 20230310.6006 133cG (Yutaka Maeda) 20230311.526 132 (Tsuneo Horie) 20230311.775 136CV (Klaus Wenzel) 20230313.6257 134cG (Yutaka Maeda) 20230313.6838 137C (Masayuki Moriyama) 20230313.8181 135 (Eddy Muyllaert) 20230314.5960 135cG (Yutaka Maeda) 20230314.6601 137C (Masayuki Moriyama) 20230314.887 134 (Gary Poyner) 20230315.451 134 (Tsuneo Horie) 20230315.6120 134cG (Yutaka Maeda) 20230315.801 132 (Klaus Wenzel) 20230316.453 <126 (Tsuneo Horie) 20230316.972 134 (Gary Poyner)

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[vsnet-alert 27520] ATOJ302.3933+55.0904 = VSSPJ200934.41+550525.8: currently dwarf nova
by Taichi Kato 17 Mar '23

17 Mar '23

ATOJ302.3933+55.0904 = VSSPJ200934.41+550525.8: currently dwarf nova Dwarf nova outbursts since 2020 Aug. (ATLAS data). Z Cam star.

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[vsnet-alert 27519] Re: TCP J06461075+2502415: most likely WZ Sge-type dwarf nova
by Taichi Kato 17 Mar '23

17 Mar '23

Re: TCP J06461075+2502415: most likely WZ Sge-type dwarf nova Using all the available data, the presence of early superhumps has become inconclusive. Let's wait to see ordinary superhumps to appear. Observers: Itoh-san, Kyoto U. team, Kiyota-san, Tonny Vanmunster, Sano-san, Tamas Tordai and Magnus Larsson.

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[vsnet-alert 27518] ASASSN-23bn: new SU UMa-type dwarf nova
by Taichi Kato 17 Mar '23

17 Mar '23

ASASSN-23bn: new SU UMa-type dwarf nova According to observations by Peter Starr on Mar. 15, this object showed clear ordinary superhumps (amplitude 0.07 mag). Although the data by Josch Hambsch (Mar. 11-14) were suggestive of superhumps, the reality was not confirmed due to the sparse sampling. High time-resolution data by Berto Monard on Mar. 12 did not show evidence. There may have been variations (possible early superhumps?) on Mar. 10, but were not conclusive.

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[vsnet-alert 27517] Gaia DR3 5648566130992828800 = Gaia23bcj: UGSS+ELL, in outburst but fading
by Taichi Kato 17 Mar '23

17 Mar '23

Gaia DR3 5648566130992828800 = Gaia23bcj: UGSS+ELL, in outburst but fading Gaia23bcj 2023-03-10 13:51:47 136.71472 -26.41193 15.62 18.33 0.09 unknown 2023-03-17 00:01:57 ~3 mag brightening in Gaia / WISE source, gets bluer Porb = 0.423739(2) d (ATLAS data). Ellipsoidal variations with an amplitude of 0.3 mag.

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[vsnet-alert 27516] MASTER OT J051529.15+560532.0 likely superoutburst
by Taichi Kato 16 Mar '23

16 Mar '23

MASTER OT J051529.15+560532.0 likely superoutburst Known SU UMa star. Moderately observed in 2020. YYYYMMDD(UT) mag observer 20230310.5155 <156c (Yutaka Maeda) 20230313.500 <178C (Mitsutaka Hiraga) 20230313.5395 <159c (Yutaka Maeda) 20230314.5100 <164c (Yutaka Maeda) 20230314.6089 170C (Masayuki Moriyama) 20230315.5258 <159c (Yutaka Maeda) 20230316.5502 132c (Yutaka Maeda) 20230316.5502 132c (Yutaka Maeda)

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vsnet-alert March 2023