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[vsnet-chat 8807] ZTF18abjgdkx: deeply eclipsing likely IW And star
by Taichi Kato 02 Sep '21

02 Sep '21

ZTF18abjgdkx: deeply eclipsing likely IW And star According to ZTF data, this object shows deep (1.2 mag) eclipses. The period is 0.2108865(4) d. The overall light curve suggests an IW And star (particularly in 2020).

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[vsnet-chat 8806] RX J0153.3+7446: VY Scl star
by Taichi Kato 31 Aug '21

31 Aug '21

RX J0153.3+7446: VY Scl star Deep fading since 2020 Oct. in ZTF data. Now around mag 19 or even fainter.

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[vsnet-chat 8805]V841 Aql
by Taichi Kato 27 Aug '21

27 Aug '21

V841 Aql https://www.aavso.org/vsx/index.php?view=detail.top&oid=1980 Uncertain identification. Photometry (V= 19.7; V-J= 7.8) is for the red star IPHAS J190740.03+102945.5 (g-r= 2.9; J-K= 2.45; BP-RP= 7.02). The GCVS (version Nov. 2020) and the Downes catalogue identify the nova as the bluer star IPHAS J190739.84+102943.2 (g= 20.2; g-r= 1.0), which is 4" to the SW. This object is also classified as variable in 2021A&A...648A..44M and was also detected as a transient by ZTF (ZTF19abciwnk). The finding chart in 1987SSRv...45....1D does not have enough resolution to solve the two candidates. The bluer star is likely the true nova. 190739.846 +102943.22 (2000.0) Gaia_DR2_4312316597388130304 plx=0.374(0.455) dismod=12.1 pmra=-5.118(0.673) pmdec=-6.103(0.706) G=19.192 BP=19.734 RP=18.083 190739.846 +102943.22 (2000.0) Gaia_EDR3_4312316597388130304 plx=0.489(0.301) dismod=11.6 pmra=-4.266(0.283) pmdec=-5.876(0.286) G=19.169 BP=19.893 RP=18.195 The ZTF data showed a dwarf nova-like phase in 2019 June-Aug. Time-resolved data on 2018 Aug. 4 showed some degree of flickering. This is most likely the CV.

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[vsnet-chat 8803]VSOLJ bulletin
by meineko 26 Aug '21

26 Aug '21

Following VSOLJ bulletin are now available at http://vsolj.cetus-net.org/bulletin.html No.79 2021 Aug. MP Gem: VY Scl-type star, finally Taichi Kato No.80 2021 Aug. ASASSN-V J205543.90+240033.5: another white dwarf pulsar? Taichi Kato Seiichiro Kiyota, VSOLJ

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