October 2022 - vsnet-campaign-dn - ooruri.kusastro.kyoto-u.ac.jp

[vsnet-campaign-dn 16539] ASASSN-15pd possible rare outburst
by Taichi Kato 12 Oct '22

12 Oct '22

ASASSN-15pd possible rare outburst YYYYMMDD(UT) mag observer 20221010.1440 15.279zr (ZTF Alert DC mag (Masci+ 2019)) 20221010.1729 15.258zg (ZTF Alert DC mag (Masci+ 2019))

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[vsnet-campaign-dn 16538] SDSS J001153.08-064739.1: superhump period
by Taichi Kato 12 Oct '22

12 Oct '22

SDSS J001153.08-064739.1: superhump period Josch Hambsch has reported further observations. The superhump period has been determined tp be 0.10414(3) d. Amplitude 0.20 mag. If these superhumps are of stage B, the expected q=0.165 (table 4 in arXiv:2201.02945 = VSOLJ Variable Star Bulletin No. 89). Even if they are of stage C, q would be 0.18. This is very much in disagreement with Rebassa-Mansergas et al. (2014) giving q=0.32(8).

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[vsnet-campaign-dn 16537] SDSS J001153.08-064739.1 superhumps
by Taichi Kato 11 Oct '22

11 Oct '22

SDSS J001153.08-064739.1 superhumps Josch Hambsch detected superhumps also on Oct. 10. Despite the brightness (still brighter than 14.0) and 0.2-mag superhumps, no one else appears to be observing. This object is in the period gap and has an unusual secondary. Please pay more attention.

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[vsnet-campaign-dn 16536] MASTER OT J001204.00-412337.4: 7th rebrightening
by Taichi Kato 11 Oct '22

11 Oct '22

MASTER OT J001204.00-412337.4: 7th rebrightening Josch Hambsch detected another rebrightening on Oct. 10 (16.2 mag). The object had been rising before this rebrightening.

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[vsnet-campaign-dn 16535] ASASSN-21cw likely superoutburst
by Taichi Kato 09 Oct '22

09 Oct '22

ASASSN-21cw likely superoutburst YYYYMMDD(UT) mag observer 20220924.1525 14.835zr (ZTF Alert DC mag (Masci+ 2019)) 20220924.2318 15.133zg (ZTF Alert DC mag (Masci+ 2019)) 20220928.1463 15.229zr (ZTF Alert DC mag (Masci+ 2019)) 20220928.1503 15.574zg (ZTF Alert DC mag (Masci+ 2019)) 20220930.1538 15.691zg (ZTF Alert DC mag (Masci+ 2019)) 20220930.1721 15.321zr (ZTF Alert DC mag (Masci+ 2019)) 20221004.1749 15.537zr (ZTF Alert DC mag (Masci+ 2019)) 20221004.2403 16.130zg (ZTF Alert DC mag (Masci+ 2019)) 20221006.1620 16.504zg (ZTF Alert DC mag (Masci+ 2019)) 20221006.1850 15.700zr (ZTF Alert DC mag (Masci+ 2019))

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[vsnet-campaign-dn 16534] ASASSN-22mr: new WZ Sge-type dwarf nova
by Taichi Kato 09 Oct '22

09 Oct '22

ASASSN-22mr: new WZ Sge-type dwarf nova Berto Monard and Josch Hambsch have reported observations. The data show clear double-humped superhumps with a period of 0.0534(2) d (full amplitude 0.14 mag). 224117.532 -675916.24 (2000.0) Gaia_DR2_6385763697885620480 plx=3.080(0.730) dismod=7.6 pmra=7.201(1.050) pmdec=-1.210(1.120) G=20.444 BP=20.502 RP=20.160 224117.533 -675916.24 (2000.0) Gaia_EDR3_6385763697885620480 plx=2.711(0.552) dismod=7.8 pmra=6.612(0.477) pmdec=1.564(0.553) G=20.396 BP=20.299 RP=20.190 224117.459 -675916.64 (2000.0) GALEX_DR5_6384250644318917360 NUV=20.810(0.146) FUV=20.940(0.242)

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[vsnet-campaign-dn 16533] NSV10748 likely superoutburst
by Taichi Kato 08 Oct '22

08 Oct '22

NSV10748 likely superoutburst Type from ZTF data. YYYYMMDD(UT) mag observer 20221001.1637 16.243zg (ZTF Alert DC mag (Masci+ 2019)) 20221005.2350 16.628zg (ZTF Alert DC mag (Masci+ 2019))

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[vsnet-campaign-dn 16532] N080829A possible superoutburst
by Taichi Kato 08 Oct '22

08 Oct '22

N080829A possible superoutburst YYYYMMDD(UT) mag observer 20221003.5749 <155c (Yutaka Maeda) 20221005.2237 16.157zr (ZTF Alert DC mag (Masci+ 2019)) 20221005.2537 15.867zg (ZTF Alert DC mag (Masci+ 2019)) 20221005.5678 <156c (Yutaka Maeda)

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[vsnet-campaign-dn 16531] SDSS J001153.08-064739.1: most likely SU UMa star
by Taichi Kato 07 Oct '22

07 Oct '22

SDSS J001153.08-064739.1: most likely SU UMa star Josch Hambsch has recored a 0.2 mag hump. Although the baseline is one orbital cycle, the profile and amplitude suggest a superhump. This object is very interesting since it is in the period gap and has an evolved secondary. The reported mass ratio is above 0.25 and the detection of superhumps is great astrophysical importance. Continued observations are encouraged.

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[vsnet-campaign-dn 16530] ASASSN-21gw superoutburst
by Taichi Kato 06 Oct '22

06 Oct '22

ASASSN-21gw superoutburst Superhumps were detected in 2021 May. YYYYMMDD(UT) mag observer 20220927.5026 15.264zr (ZTF Alert DC mag (Masci+ 2019)) 20221004.4416 15.540zg (ZTF Alert DC mag (Masci+ 2019))

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