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

[vsnet-chat 9352] ASASSN-15nf: SU UMa star
by Taichi Kato 26 Mar '23

26 Mar '23

ASASSN-15nf: SU UMa star ZTF time-resolved data recorded superhumps in 2019 Sep. Also post-superoutburst large-amplitude humps in 2018 Aug.

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[vsnet-chat 9351] CRTSJ153023.6+220646: polar
by Taichi Kato 26 Mar '23

26 Mar '23

CRTSJ153023.6+220646: polar Bright since 2022 Aug. in ATLAS data. 1.2-mag variation (single maximum) in high state. Porb=0.0544372 d.

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[vsnet-chat 9350] HH Cnc: long outburst mimicking a superoutburst?
by Taichi Kato 26 Mar '23

26 Mar '23

HH Cnc: long outburst mimicking a superoutburst? Porb=0.1846 d. 2022 Dec.-2023 Jan. bright outburst. Possible rebrightening. YYYYMMDD(UT) mag observer 20230125.5325 17.528o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230125.5590 17.687o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230125.5620 17.654o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230125.5896 17.572o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230126.6320 17.940o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230126.6352 17.792o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230126.6412 17.794o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230126.6511 17.750o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230130.6388 152:cG (Yutaka Maeda) 20230202.6391 <153c (Yutaka Maeda) No definite superhumps were recorded (Itoh-san and Josch Hambsch).

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[vsnet-chat 9349] NSVS6625418: IW And star
by Taichi Kato 26 Mar '23

26 Mar '23

NSVS6625418: IW And star Using ATLAS+ZTF data, this object is confirmed to be an IW And star. Clear outburst from standstill in 2020. (Also likely outburst from standstill and subsequent dip, but observations discontinued due to the solar conjunction). Currently dwarf nova phase.

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[vsnet-chat 9348] CRTSJ145502.2+143815 unusual light curve during the 2022 outburst
by Taichi Kato 26 Mar '23

26 Mar '23

CRTSJ145502.2+143815 unusual light curve during the 2022 outburst Using ZTF and ATLAS data, I noticed that the 2022 June-July lasted nearly 40 days. There were two dips during the outburst, resembling some of WZ Sge stars. Time-resolved photometry on June 21 and 23 by Tonny Vanmunster did not detect short-period superhumps as expected from the outburst light curve. Vanmunster's nightly observations were an order of 0.15 d but with slow variations. This object may have showed long-period superhumps (above the period gap). ATLAS data seem to have shown some degree of superhump-like variations.

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[vsnet-chat 9347] Gaia DR3 1132628402609289472: AM CVn star?
by Taichi Kato 25 Mar '23

25 Mar '23

Gaia DR3 1132628402609289472: AM CVn star? From ZTF data. Superoutbursts every ~170 d. Peak 17 mag.

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[vsnet-chat 9346] ASASSN-VJ090756.65+715859.5: IW And
by Taichi Kato 25 Mar '23

25 Mar '23

ASASSN-VJ090756.65+715859.5: IW And From ZTF data.

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[vsnet-chat 9345] NSVS6625418: bright Z Cam star
by Taichi Kato 25 Mar '23

25 Mar '23

NSVS6625418: bright Z Cam star From ZTF data. 13.4-16.6. https://www.aavso.org/vsx/index.php?view=detail.top&oid=227663

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[vsnet-chat 9344] ASASSN-15ib: neglected bright dwarf nova
by Taichi Kato 25 Mar '23

25 Mar '23

ASASSN-15ib: neglected bright dwarf nova This appears to be superoutburst + rebrightening. YYYYMMDD(UT) mag observer 20200820.2394 17.667c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20200820.2427 17.532c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20200820.2505 17.509c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20200820.2637 17.464c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20200822.2674 14.702o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20200822.2706 14.716o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20200822.2758 14.708o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20200822.2859 14.729o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20200824.2407 13.039o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20200824.2439 13.044o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20200824.2495 13.056o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20200824.2614 13.046o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20200828.2410 13.371o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20200828.2447 13.363o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20200828.2506 13.258o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20200828.2610 13.191o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20200903.2321 14.797o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20200903.2353 14.747o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20200903.2408 14.717o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20200903.2524 14.824o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20200905.2429 16.360o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20200905.2466 16.276o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20200905.2535 16.076o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20200905.2655 16.138o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20200907.2239 16.502o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20200907.2257 16.524o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20200907.2276 16.518o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20200907.2295 16.351o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20200907.2336 16.365o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20200907.2364 16.535o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20200907.2435 16.427o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20200907.2490 16.670o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20200909.2264 15.088c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20200909.2296 15.104c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20200909.2352 15.125c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20200909.2467 15.157c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20200911.2217 16.686o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20200911.2250 16.841o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20200911.2324 16.924o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20200911.2425 16.752o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20200913.2215 17.400c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20200913.2247 17.474c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20200913.2307 17.380c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20200913.2408 17.229c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20200915.2192 16.828o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20200915.2224 16.896o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20200915.2279 16.922o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20200915.2385 16.958o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505))

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[vsnet-chat 9343] V1773 Oph: IW And star
by Taichi Kato 25 Mar '23

25 Mar '23

V1773 Oph: IW And star Based on ATLAS and ZTF. Sometimes deep dips below mag 20.

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