December 2021 - vsnet-chat - ooruri.kusastro.kyoto-u.ac.jp

[vsnet-chat 8996] ZTF19abrqett: IW And-like phenomenon
by Taichi Kato 21 Dec '21

21 Dec '21

ZTF19abrqett: IW And-like phenomenon There was only one short fading in the ZTF data in 2020 July. The object brightened before and after this event and it is most likely a disk-instability phenomenon similar to an IW And-type dip, not VY Scl phenomenon.

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[vsnet-chat 8995] ZTF19acqxtql: outbursts from an intermediate polar?
by Taichi Kato 21 Dec '21

21 Dec '21

ZTF19acqxtql: outbursts from an intermediate polar? ZTF data show two outbursts in 2019 Nov. They were only 8 d apart and no other outbursts were detected. The fading rates were very rapid (2 mag/d) and they look like IP outbursts.

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[vsnet-chat 8993] VSOLJ bullein No.87
by meineko 19 Dec '21

19 Dec '21

Following new VSOLJ Bulletin are available at http://vsolj.cetus-net.org/bulletin.html No.87 2021 Nov. Study of the low-amplitude Z Cam star IX Vel Taichi Kato Seiichiro Kiyota VSOLJ

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[vsnet-chat 8992] CM Mic: ER UMa + Z Cam star
by Naoto Kojiguchi 03 Dec '21

03 Dec '21

CM Mic: ER UMa + Z Cam star From ASAS-SN+TESS data. Standstill in 2017 Oct.-2019 Jul. (see vsnet-chat 8095). Superoutbursts in 2019 Jul.-2021. Supercycle ~ 51.7(3) d. Psh ~ 0.080277(3) d. 2019 Aug. and 2021 Sep. superoutbursts resemble long superoutbursts (permanent superhumper state) in RZ LMi in 2016. Similar objects: MGAB-V859 (see vsnet-chat 8510, 8511) ZTF18abgjsdg (see vsnet-chat 8640) ZTF18abncpgs (see vsnet-chat 8896)

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[vsnet-chat 8991] MLSJ034713.8+161108: VY Scl star
by Taichi Kato 01 Dec '21

01 Dec '21

MLSJ034713.8+161108: VY Scl star = ASASSN-VJ034713.87+161108.9 = ATOJ056.8078+16.1856 = ZTFJ034713.88+161108.1 = LAMOST J072304.77+020437.4 https://arxiv.org/abs/2111.13049 Deep fading in late 2019 to 2020 in ZTF data.

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[vsnet-chat 8990] ATOJ110.7699+02.0770: NL
by Taichi Kato 01 Dec '21

01 Dec '21

ATOJ110.7699+02.0770: NL = LAMOST J072304.77+020437.4 https://arxiv.org/abs/2111.13049 2MASS 072304.781 +020437.55 (2000.0) 15.021 14.850 14.858 072304.7 +020437 (2000.0) ATOJ110.7699+02.0770 dubious c=15.143 o=15.220 P(LS)=0.606047 rms=0.07 072304.7 +020437 (2000.0) ZTFJ072304.78+020437.3 g=15.507 (15.309-15.711) P=0.0070 072304.780 +020437.25 (2000.0) Gaia_DR2_3135760162593729792 plx=0.615(0.047) dismod=11.1 pmra=2.421(0.085) pmdec=-4.871(0.068) G=15.136 BP=15.107 RP=14.917 072304.781 +020437.24 (2000.0) Gaia_EDR3_3135760162593729792 plx=0.692(0.032) dismod=10.8 pmra=2.383(0.036) pmdec=-4.847(0.031) G=15.131 BP=15.152 RP=14.947 Flickering in ZTF data.

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[vsnet-chat 8989] BMAM-V708: AM:
by Taichi Kato 01 Dec '21

01 Dec '21

BMAM-V708: AM: = LAMOST J021633.89+251346.5 https://arxiv.org/abs/2111.13049 Strong He II. The ZTF light curve doesn't look like a dwarf nova.

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[vsnet-chat 8988] PS1-3PIJ211249.93+374225.9: CV:
by Taichi Kato 01 Dec '21

01 Dec '21

ATOJ305.7515+06.5284: NL = LAMOST J202300.37+063142.4 https://arxiv.org/abs/2111.13049 202300.380 +063142.41 (2000.0) Gaia_DR2_4249755657041989376 plx=0.568(0.048) dismod=11.2 pmra=-2.391(0.074) pmdec=-4.284(0.066) G=15.341 BP=15.292 RP=15.264 202300.380 +063142.40 (2000.0) Gaia_EDR3_4249755657041989376 plx=0.487(0.039) dismod=11.6 pmra=-2.371(0.050) pmdec=-4.228(0.033) G=15.310 BP=15.303 RP=15.243 202300.370 +063142.38 (2000.0) GALEX_DR5_6379360087465531119 NUV=15.566(0.009) FUV=15.666(0.025)

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[vsnet-chat 8987] ATOJ305.7515+06.5284: NL
by Taichi Kato 01 Dec '21

01 Dec '21

ATOJ305.7515+06.5284: NL = LAMOST J202300.37+063142.4 https://arxiv.org/abs/2111.13049 202300.380 +063142.41 (2000.0) Gaia_DR2_4249755657041989376 plx=0.568(0.048) dismod=11.2 pmra=-2.391(0.074) pmdec=-4.284(0.066) G=15.341 BP=15.292 RP=15.264 202300.380 +063142.40 (2000.0) Gaia_EDR3_4249755657041989376 plx=0.487(0.039) dismod=11.6 pmra=-2.371(0.050) pmdec=-4.228(0.033) G=15.310 BP=15.303 RP=15.243 202300.370 +063142.38 (2000.0) GALEX_DR5_6379360087465531119 NUV=15.566(0.009) FUV=15.666(0.025)

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[vsnet-chat 8986] CSSJ032034.5+203607: AM
by Taichi Kato 01 Dec '21

01 Dec '21

CSSJ032034.5+203607: AM = LAMOST J032034.51+203607.2 https://arxiv.org/abs/2111.13049 Strong He II. Classified as a polar in this paper. The orbital period would be half of 0.320948 d (CSS). 032034.545 +203607.02 (2000.0) Gaia_DR2_61121202850354048 plx=0.979(0.099) dismod=10.0 pmra=13.134(0.205) pmdec=3.557(0.139) G=16.790 BP=17.271 RP=16.077 032034.546 +203607.02 (2000.0) Gaia_EDR3_61121202850354048 plx=1.092(0.077) dismod=9.8 pmra=13.266(0.093) pmdec=3.458(0.068) G=16.791 BP=17.302 RP=16.062

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