May 2022 - vsnet-newvar - ooruri.kusastro.kyoto-u.ac.jp

[vsnet-newvar 9324] ASASSN-22gx
by Taichi Kato 13 May '22

13 May '22

ASASSN-22gx ASASSN-22gx --- ------- 18:28:47.09 -74:48:35.5 2022-05-12.15 11.8 SDSS DSS VIZIER ------- CV candidate, matches to GAIA DR2 G=19.9, g>17.7 on 2022-05-10.35, g=12.2 on 2022-05-12.15, g=12.1 on 2022-05-12.31 ASASSN-22gx 20220510.35 <177g ASN ASASSN-22gx 20220512.15 122g ASN ASASSN-22gx 20220512.31 121g ASN In outburst in 2MASS? 2MASS 182847.058 -744834.70 (2000.0) 14.155 14.155 14.175 182847.069 -744834.99 (2000.0) Gaia_DR2_6414712602093478016 plx=2.406(0.475) dismod=8.1 pmra=-3.677(0.604) pmdec=-16.212(1.161) G=19.889 BP=20.079 RP=19.662 182847.068 -744835.00 (2000.0) Gaia_EDR3_6414712602093478016 plx=2.599(0.364) dismod=7.9 pmra=-2.691(0.297) pmdec=-15.721(0.481) G=19.856 BP=20.009 RP=19.581

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[vsnet-newvar 9323] ZTF J181732.64+101954.5: ER UMa + Z Cam + IW And
by Taichi Kato 12 May '22

12 May '22

ZTF J181732.64+101954.5: ER UMa + Z Cam + IW And From ZTF data. Supercycle about 56 d before 2020 May. Then long standstill. ER UMa state e.g. 2019 July-Sep. (normal outbursts + superoutburst). In 2019 Mar.-June, two superoutbursts occurred directly from a standstill (like NY Ser), but with the same supercycle. Superhumps with a period of 0.08881(4) d (0.13 mag) were detected during the 2019 June-July superoutburst. IW And state (dip following superoutburst) was recorded in 2018 Mar.-July.

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[vsnet-newvar 9322] ASASSN-21qj: not VY Scl
by Taichi Kato 12 May '22

12 May '22

ASASSN-21qj: not VY Scl ASAS-SN data: https://asas-sn.osu.edu/sky-patrol/coordinate/e62dc628-571c-4558-aa26-44169… Resembles a fader (IS).

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[vsnet-newvar 9321] MGAB-V202: orbital period
by Taichi Kato 12 May '22

12 May '22

MGAB-V202: orbital period From TESS data. Porb=0.17248(2) d (amp. 0.011 mag).

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[vsnet-newvar 9312] XM116HT = TCP J14225968+4122545: WZ Sge-type star with prominent early superhumps
by Taichi Kato 12 May '22

12 May '22

XM116HT = TCP J14225968+4122545: WZ Sge-type star with prominent early superhumps Tamas Tordai has reported observations. The object shows double-wave 0.3-mag early superhumps. The period is still somewhat uncertain (0.0557-0.0571 d). Bright WZ Sge stars with large-amplitude early superhumps are rare and observations are encouraged.

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[vsnet-newvar 9319] ASASSN-22gm: superhumps (AM CVn)
by Taichi Kato 12 May '22

12 May '22

ASASSN-22gm: superhumps (AM CVn) Josch Hambsch has reported further observations. The data show 0.2-mag superhumps with a period of 0.0291(2) d. Further observations are strongly encouraged.

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[vsnet-newvar 9318] GSC8389.85: IW And star and orbital period
by Taichi Kato 11 May '22

11 May '22

GSC8389.85: IW And star and orbital period From TESS data. Porb=0.13550(1) d. Amplitude 0.02 mag. Heartbeat phase in TESS observation.

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[vsnet-newvar 9317] GSC8944.2101: orbital period
by Taichi Kato 11 May '22

11 May '22

GSC8944.2101: orbital period From TESS data. Porb=0.168058(6) d. Amplitude 0.04 mag. Double maxima in one period. Negative superhumps with a period of 0.158321(2) d (amp. 0.025 mag), or this may be the orbital one. Beat phenomenon is also present.

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[vsnet-newvar 9316] ASASSN-V J061528.41-412007.3: orbital period: orbital period
by Taichi Kato 11 May '22

11 May '22

ASASSN-V J061528.41-412007.3: orbital period From TESS data. Porb=0.279970(6) d. Amplitude 0.055 mag. Clear modulation.

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[vsnet-newvar 9315] CD-35.9665: orbital period: orbital period
by Taichi Kato 11 May '22

11 May '22

CD-35.9665: orbital period From TESS data. Porb=0.124824(4) d. Amplitude 0.09 mag.

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vsnet-newvar May 2022