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

[vsnet-newvar 9884] Standstill-like behavior in MGAB-V306
by Taichi Kato 19 Mar '23

19 Mar '23

Standstill-like behavior in MGAB-V306 (Not UGSU:) YYYYMMDD(UT) mag observer 20230308.8255 18.898o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230308.8287 18.752o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230308.8410 18.450o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230309.8426 18.219o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230309.8526 18.144o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230309.8558 18.277o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230309.8657 18.181o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230310.0800 18.276o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230310.0830 17.997o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230310.0835 18.219o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230310.0958 18.260o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230310.1116 18.070o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230310.1121 18.133o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230311.1003 17.975o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230311.1035 18.353o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230311.1141 18.071o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230311.1191 18.161o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230311.1278 17.897o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230312.8219 18.020c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230312.8247 17.982c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230312.8276 18.185c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230312.8304 18.021c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230313.7965 18.236c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230313.7996 18.213c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230313.8064 18.073c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230313.8164 18.063c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230314.0663 18.329o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230314.0694 18.291o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230314.0863 18.107o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230314.1031 18.239o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230315.0440 18.477o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230315.0476 18.500o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230315.0544 18.310o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230315.0647 18.188o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505))

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[vsnet-newvar 9883] 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-newvar 9882] 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-newvar 9881] 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-newvar 9880] 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-newvar 9879] 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-newvar 9878] 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-newvar 9877] 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-newvar 9876] 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-newvar 9875] TCP J06461075+2502415: most likely WZ Sge-type dwarf nova
by Taichi Kato 15 Mar '23

15 Mar '23

TCP J06461075+2502415: most likely WZ Sge-type dwarf nova Kiyota-san and Itoh-san have reported observations (also some data from Magnus Larsson). The observations show likely early superhumps with a period of 0.053(1) d and an amplitude of 0.05 mag. The period was based on a few cycles and will be updated as more data become available.

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