January 2023 - vsnet-campaign-dn - ooruri.kusastro.kyoto-u.ac.jp

[vsnet-campaign-dn 16827] V827 Cep: likely SU UMa with a fainter counterpart
by Taichi Kato 07 Jan '23

07 Jan '23

V827 Cep: likely SU UMa with a fainter counterpart I found a likely superoutburst in the ATLAS data. The amplitude looks too small and the true counterpart is likely a fainter one near the USNO object. 20180611.5803 19.220c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20180613.5623 18.838o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20180613.5716 18.555o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20180613.5819 18.780o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20180613.5928 18.679o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20180615.5517 16.381c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20180615.5615 16.407c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20180615.5715 16.408c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20180615.5821 16.381c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20180617.5371 16.434o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20180617.5477 16.470o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20180617.5589 16.442o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20180617.5701 16.476o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20180619.5601 16.599o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20180619.5698 16.468o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20180621.5233 16.791o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20180621.5348 16.727o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20180621.5454 16.600o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20180621.5572 16.681o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20180623.5324 16.919o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20180623.5422 16.889o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20180623.5527 16.983o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20180623.5637 16.939o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20180625.5490 17.118o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20180625.5600 17.011o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20180625.5703 17.020o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20180625.5809 17.133o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20180627.2902 17.282o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20180627.5884 17.325o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20180627.5994 17.425o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20180627.6110 17.284o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20180627.6224 17.561o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20180629.4774 18.266o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20180629.4880 18.518o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20180701.5259 18.639o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20180701.5291 18.814o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20180701.5380 18.757o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20180701.5473 18.675o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505))

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[vsnet-campaign-dn 16826] DI Phe: dwarf nova (most likely SU UMa)
by Taichi Kato 07 Jan '23

07 Jan '23

DI Phe: dwarf nova (most likely SU UMa) ATLAS detected several outbursts. This one is most likely a superoutburst. YYYYMMDD(UT) mag observer 20220706.0753 19.437o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20220706.0781 19.565o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20220706.0832 19.244o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20220714.0196 16.337o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20220714.0207 16.439o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20220714.0225 16.616o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20220717.9998 16.785o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20220718.0095 16.760o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20220718.0128 16.800o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20220718.0381 16.716o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20220720.3231 17.241o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20220720.3396 17.031o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20220720.3427 17.061o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20220720.3454 17.148o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20220722.0533 19.138o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20220722.0567 18.863o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20220722.0595 19.187o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20220724.3076 19.152o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20220724.3255 19.453o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20220724.3291 18.995o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505))

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[vsnet-campaign-dn 16825] Highly variable high state of CM Phe
by Taichi Kato 07 Jan '23

07 Jan '23

Highly variable high state of CM Phe Recent ATLAS observations are given. The object was in relatively low state with dwarf nova outbursts in 2018-2021. High state similar to the current one was seen before 2018 in the ASAS-SN data. YYYYMMDD(UT) mag observer 20221126.8209 15.029c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221126.8241 15.109c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221126.8305 15.171c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221126.8424 15.286c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221129.0762 14.923o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221129.0803 14.834o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221129.0866 14.856o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221129.0974 14.736o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221130.8079 14.811o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221130.8110 14.811o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221130.8169 14.807o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221130.8205 14.831o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221130.8236 14.762o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221130.8268 14.751o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221130.8308 14.790o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221130.8408 14.812o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221203.0656 15.065o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221203.0683 15.088o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221203.0733 15.110o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221203.0828 15.119o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221204.8105 15.188o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221204.8237 15.167o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221204.8270 15.138o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221204.8325 15.158o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221204.8381 15.025o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221204.8409 15.139o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221204.8470 15.123o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221204.8571 15.049o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221207.0875 15.335o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221207.0929 15.269o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221207.0965 15.157o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221207.1189 15.242o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221208.7862 15.077o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221208.7929 15.069o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221208.7961 15.104o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221208.8088 14.927o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221208.8106 15.131o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221208.8161 15.261o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221208.8192 15.230o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221208.8307 15.208o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221211.0518 14.947o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221211.0609 14.939o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221211.0641 15.003o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221211.0740 15.082o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221215.0557 15.896c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221215.0612 15.746c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221215.0644 15.700c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221215.0746 15.775c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221219.0450 16.108c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221219.0480 16.086c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221219.0534 15.943c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221219.0699 15.909c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221220.7908 15.474o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221220.7941 15.435o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221220.7995 15.515o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221220.8097 15.538o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221223.0477 15.727c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221223.0513 15.661c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221223.0577 15.555c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221223.0685 15.643c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221227.0372 15.796c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221227.0403 16.042c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221227.0458 16.055c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221227.0650 16.055c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221231.0355 15.393o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221231.0386 15.482o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221231.0625 15.333o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505))

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[vsnet-campaign-dn 16824] CS Ind: observations on Jan. 4
by Taichi Kato 07 Jan '23

07 Jan '23

CS Ind: observations on Jan. 4 Observations by Filipp Romanov obtained a rather flat light curve (but only for 1 hr and it would be difficult to exclude the presence of superhumps).

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[vsnet-campaign-dn 16823] PNVJ06245297+0208207: no apparent superhumps yet
by Taichi Kato 07 Jan '23

07 Jan '23

PNVJ06245297+0208207: no apparent superhumps yet Tamas Tordai has reported observations. No large-amplitude superhumps were present and this object is likely a helium WZ Sge star with a low inclination.

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[vsnet-campaign-dn 16822] ATLAS17kol likely superoutburst
by Taichi Kato 07 Jan '23

07 Jan '23

ATLAS17kol likely superoutburst Type from ZTF data. http://gsaweb.ast.cam.ac.uk/alerts/alert/Gaia23acc/ Gaia23acc AT2023au 2023-01-03 09:45:23 15.52831 1.27574 16.93 CV 2023-01-05 07:21:51 Outburst in confirmed CV

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[vsnet-campaign-dn 16821] ASASSN-15cl likely superoutburst
by Taichi Kato 07 Jan '23

07 Jan '23

ASASSN-15cl likely superoutburst Known SU UMa star. Last superoutburst in 2022 Jan. YYYYMMDD(UT) mag observer 20221231.6265 <152c (Yutaka Maeda) 20230102.5990 <153c (Yutaka Maeda) 20230103.5885 <154c (Yutaka Maeda) 20230104.5834 <140c (Yutaka Maeda) 20230106.508 138 (Rod Stubbings)

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[vsnet-campaign-dn 16820] Standstill in CR Boo
by Taichi Kato 06 Jan '23

06 Jan '23

Standstill in CR Boo Using ATLAS forced photometry (Tonry et al. 2018; Shingles et al. 2021) and observations reported to VSNET, I found that CR Boo was almost constant between 2022 May and early July. A faint state without a dwarf nova outburst (around 17 mag) followed. The former appears to be a true standstill without low-amplitude oscillations. The latter may have reflected a lower mass-transfer rate, but the duration was too short to be recognized as a VY Scl-type fading episode. The object currently appears to show dwarf nova outbursts.

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[vsnet-campaign-dn 16819] Very low state of AG Aps
by Taichi Kato 06 Jan '23

06 Jan '23

Very low state of AG Aps Accoring to ATLAS forced photometry (Tonry et al. 2018; Shingles et al. 2021), this object was near the limit of detection (near 20.0 mag) in 2022. Outbursts were also present, but very faint (17 mag).

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[vsnet-campaign-dn 16818] PNVJ06245297+0208207
by Taichi Kato 06 Jan '23

06 Jan '23

PNVJ06245297+0208207 http://cbat.eps.harvard.edu/unconf/followups/J06245297+0208207.html Gaia ID: 062452.898 +020818.04 (2000.0) Gaia_DR2_3124112584945910912 plx=2.987(0.354) dismod=7.6 pmra=-18.782(0.630) pmdec=24.627(0.670) G=19.266 BP=19.186 RP=19.118 062452.897 +020818.06 (2000.0) Gaia_EDR3_3124112584945910912 plx=2.994(0.313) dismod=7.6 pmra=-19.292(0.354) pmdec=24.766(0.318) G=19.226 BP=19.295 RP=19.222 Brightening was recorded by ATLAS prior to the outburst. YYYYMMDD(UT) mag observer 20221218.2000 19.386c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221222.2929 19.388c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221226.1704 19.237c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221226.2057 19.105c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221226.2271 19.384c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221227.9054 18.688o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221227.9085 18.458o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221227.9140 18.550o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221227.9361 18.465o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221230.1596 18.586o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221230.1637 18.215o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221230.1892 18.900o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221230.1946 18.746o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221231.9034 18.797o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221231.9115 18.821o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221231.9183 18.974o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230103.1303 18.350o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230103.1335 18.380o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)

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