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

[vsnet-newvar 9010] ASASSN-21vv
by Taichi Kato 08 Dec '21

08 Dec '21

ASASSN-21vv ASASSN-21vv --- ------- 3:44:15.99 22:7:9.2 2021-12-5.16 14.9 SDSS DSS VIZIER ------- CV candidate, matches to PS1 g=21.5, g>17.9 on 2021-12-04.27, g=15.2 on 2021-12-05.16, g=15.4 on 2021-12-06.06, g=15.4 on 2021-12-06.27 ASASSN-21vv 20211204.27 <179g ASN ASASSN-21vv 20211205.16 152g ASN ASASSN-21vv 20211206.06 154g ASN ASASSN-21vv 20211206.27 154g ASN

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[vsnet-newvar 9009] ZTF J210411.01-010202.3 = Gaia21fhx: superoutburst of AM CVn star?
by Taichi Kato 07 Dec '21

07 Dec '21

ZTF J210411.01-010202.3 = Gaia21fhx: superoutburst of AM CVn star? Josch Hambsch have reported observations. The object gradually faded from Nov. 28 to Dec. 4, then followed by sudden fading by 1.8 mag on the next night. This fading rate is too large for a hydrogen-rich dwarf nova. This object may be an AM CVn star (or EI Psc star) and further observations are encouraged.

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[vsnet-newvar 9008] CTCVJ1940-4724
by Taichi Kato 04 Dec '21

04 Dec '21

CTCVJ1940-4724 likely superoutburst http://gsaweb.ast.cam.ac.uk/alerts/alert/Gaia21fjv/ Gaia21fjv AT2020qvc 2021-12-01 14:29:06 295.15681 -47.41402 13.32 16.12 1.02 CV 2021-12-03 11:07:56 outburst in known CV CTCV J1940-4724

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[vsnet-newvar 9007] CRTS J072144.5+663838 likely superoutburst
by Taichi Kato 04 Dec '21

04 Dec '21

CRTS J072144.5+663838 likely superoutburst (Relatively short supercycle) http://gsaweb.ast.cam.ac.uk/alerts/alert/Gaia21fjy/ Gaia21fjy AT2021agbm 2021-12-01 23:21:00 110.43524 66.64385 15.57 17.63 0.91 CV 2021-12-03 11:08:16 outburst in confirmed CV CSS111124:072144+663838

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[vsnet-newvar 9006] MASTER OT J030227.28+191754.5: period of early superhumps
by Taichi Kato 03 Dec '21

03 Dec '21

MASTER OT J030227.28+191754.5: period of early superhumps Kyoto U team, Itoh-san, Kiyota-san, Tamas Tordai, Osaka Kyoiku U team, Josch Hambsch and Tonny Vanmunster have reported observations. The period of early superhumps is 0.05985(3) d (full amplitude 0.03 mag). During the rising phase, this period was not detected.

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[vsnet-newvar 9005] TCP J20441708-2037591: new SU UMa-type dwarf nova
by Taichi Kato 03 Dec '21

03 Dec '21

TCP J20441708-2037591: new SU UMa-type dwarf nova Josch Hambsch, Itoh-san and Kiyota-san have reported observations. According to the data by Hambsch, this object started to show superhumps on Nov. 30. Due to the short visibility in the evening sky, the superhump period has not been yet determined.

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[vsnet-newvar 9004] 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-newvar 9003] 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-newvar 9002] 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-newvar 9001] 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-newvar December 2021