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

[vsnet-chat 9357] ASASSN-VJ094712.77-674504.0: UGSS+E
by Taichi Kato 27 Mar '23

27 Mar '23

ASASSN-VJ094712.77-674504.0: UGSS+E Porb=0.234979 d from ATLAS data. Eclipses 1.1 mag in quiescence + ellipsoidal modulations. Outbursts reaching 15.2.

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[vsnet-chat 9356] ASASSN-15na: missed superoutburst in 2019
by Taichi Kato 27 Mar '23

27 Mar '23

ASASSN-15na: missed superoutburst in 2019 (WZ Sge) Only the peak is shown. YYYYMMDD(UT) mag observer 20190627.4400 15.598c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20190627.4410 15.527c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20190627.4478 15.553c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20190627.4483 15.568c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20190627.4510 15.537c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20190627.4515 15.621c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20190627.4611 15.468c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20190627.4615 15.522c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505))

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[vsnet-chat 9355] ASASSN-15nz: SU UMa star
by Taichi Kato 27 Mar '23

27 Mar '23

ASASSN-15nz: SU UMa star ATLAS detected superhumps during the 2022 Apr. outburst.

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[vsnet-chat 9354] NSV11274: SS Cyg star
by Taichi Kato 27 Mar '23

27 Mar '23

NSV11274: SS Cyg star From ATLAS data. Range 14.0-17.5. Frequent outbursts. 184522.016 -462528.38 (2000.0) Gaia_DR2_6705536352519862144 plx=1.172(0.056) dismod=9.7 pmra=7.315(0.074) pmdec=-9.845(0.068) G=14.447 BP=14.318 RP=14.214 184522.016 -462528.38 (2000.0) Gaia_EDR3_6705536352519862144 plx=1.140(0.034) dismod=9.7 pmra=7.403(0.025) pmdec=-9.727(0.023) G=15.027 BP=15.141 RP=14.758 184522.012 -462527.32 (2000.0) GALEX_DR5_6383969183300850802 NUV=15.027(0.007) FUV=15.062(0.012)

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[vsnet-chat 9353] NSV03626: Z Cam star
by Taichi Kato 27 Mar '23

27 Mar '23

NSV03626: Z Cam star From ATLAS data. Currently in low-amplitude state (around 15.5). 073143.878 +011715.11 (2000.0) Gaia_DR2_3134745107203068928 plx=1.362(0.069) dismod=9.3 pmra=-10.134(0.123) pmdec=-1.404(0.115) G=16.518 BP=16.770 RP=15.967 073143.878 +011715.10 (2000.0) Gaia_EDR3_3134745107203068928 plx=1.309(0.061) dismod=9.4 pmra=-10.095(0.056) pmdec=-1.385(0.049) G=16.480 BP=16.733 RP=15.932

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[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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