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[vsnet-campaign-dn 17409] V591 Cen superoutburst
by Taichi Kato 12 Jul '23

12 Jul '23

V591 Cen superoutburst (Already well after peak) YYYYMMDD(UT) mag observer 20230627.0844 16.505g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230629.0542 16.453g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230701.0942 15.149g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230701.1346 15.138g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230703.0064 14.927g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) … [View More]

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[vsnet-campaign-dn 17408] ASASSN-17mj possible superoutburst
by Taichi Kato 12 Jul '23

12 Jul '23

ASASSN-17mj possible superoutburst Type from ASAS-SN(ver2). Precursor+superoutburst in 2019 Oct. YYYYMMDD(UT) mag observer 20230705.7769 16.297g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230706.7714 16.366g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230707.1696 <15.496g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230708.1776 15.989g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230709.0732 14.939g (ASAS-… [View More]

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[vsnet-campaign-dn 17407] ASASSN-16gg likely superoutburst
by Taichi Kato 10 Jul '23

10 Jul '23

ASASSN-16gg likely superoutburst Type from ASAS-SN(ver2)+ATLAS. YYYYMMDD(UT) mag observer 20230623.0415 16.481g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230625.1712 16.604g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230625.2140 16.729g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230628.0950 16.657g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230629.2036 13.745g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; … [View More]

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[vsnet-campaign-dn 17406] CRTS J162619.8-125557 possible outburst
by Taichi Kato 10 Jul '23

10 Jul '23

CRTS J162619.8-125557 possible outburst Can be a noise. UGSU:+E YYYYMMDD(UT) mag observer 20230705.3443 <16.131g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230705.9503 <16.039g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230706.2367 <16.916g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230706.3460 <16.840g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230706.8613 <16.402g (ASAS-SN Sky Patrol … [View More]

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[vsnet-campaign-dn 17405] ASASSN-15im likely superoutburst
by Taichi Kato 10 Jul '23

10 Jul '23

ASASSN-15im likely superoutburst Combined magnitudes, but the phenomenon is real. Type from ASAS-SN DB. Supercycle about 150 d. YYYYMMDD(UT) mag observer 20230625.3131 16.177g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230625.9705 16.574g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230626.0591 16.149g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230626.9640 16.590g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) … [View More]20230626.9957 16.742g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230627.0469 16.280g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230628.0241 16.155g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230628.0440 16.096g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230628.0593 16.818g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230628.0593 16.830g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230630.1421 15.136g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230630.1731 15.214g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230630.8416 15.256g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230630.9211 14.881g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230701.0663 15.158g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230701.0743 15.047g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230701.9981 15.319g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230702.0378 14.846g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230702.7841 14.913g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230703.0061 15.318g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230703.7720 15.537g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230704.2761 15.083g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230705.7618 15.251g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230706.0262 15.439g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230706.1891 15.547g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230706.7363 15.703g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230706.7635 15.431g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230707.3081 15.541g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230708.3069 15.470g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230709.0045 15.590g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) [View Less]

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[vsnet-campaign-dn 17404] ASASSN-14cy outburst?
by Taichi Kato 10 Jul '23

10 Jul '23

ASASSN-14cy outburst? Rather noisy data, but could be a real outburst. YYYYMMDD(UT) mag observer 20230701.2490 <16.859g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230701.8498 <16.476g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230701.9671 <16.780g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230702.1331 <16.537g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230702.8801 <16.518g (ASAS-SN Sky … [View More]

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[vsnet-campaign-dn 17403] V2276 Sgr outburst (AM CVn?)
by Taichi Kato 10 Jul '23

10 Jul '23

V2276 Sgr outburst (AM CVn?) Combined ATLAS+ASAS-SN(ver2) data indicate that this object is clearly a dwarf nova. The 2022 Sep. and 2021 Aug. outbursts showed a dip and rebrightening resembling an AM CVn star. Supercycle is 80-100 d. The object may be similar to MASTER OT J055845.55+391533.4 or MASTER OT J172758.09+380021.5 (see VSOLJ Variable Star Bulletin No. 113). The spectral type DC:, however, by Skiff (see AAVSO VSX) would favor a hydrogen-poor object. The current outburst appears … [View More]

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[vsnet-campaign-dn 17402] V803 Cen: cyclic state after dip
by Taichi Kato 10 Jul '23

10 Jul '23

V803 Cen: cyclic state after dip Entered a short-period cyclic state after the dip on July 2 (data: Josch Hambsch).

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[vsnet-campaign-dn 17401] V1052 Cyg standstill
by Taichi Kato 10 Jul '23

10 Jul '23

V1052 Cyg standstill Some sign of standstill also in 2017 (somewhat IW And-like). YYYYMMDD(UT) mag observer 20230406.5844 16.809g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230406.6122 16.712o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230406.6212 16.623o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230406.6344 16.659o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230406.6405 16.650o (ATLAS Forced Photometry (Tonry+2018; … [View More]Shingles+2021)) 20230408.4765 16.372zr (ZTF Alert DC mag (Masci+ 2019)) 20230408.4765 16.403zr (Zwicky Transient Facility (Masci et al., 2019)) 20230408.4862 16.490zg (ZTF Alert DC mag (Masci+ 2019)) 20230408.4862 16.510zg (Zwicky Transient Facility (Masci et al., 2019)) 20230408.8494 <143c (Yutaka Maeda) 20230409.5706 15.858g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230410.4366 16.051zr (Zwicky Transient Facility (Masci et al., 2019)) 20230410.4366 16.052zr (ZTF Alert DC mag (Masci+ 2019)) 20230410.4877 16.042zg (ZTF Alert DC mag (Masci+ 2019)) 20230410.4877 16.056zg (Zwicky Transient Facility (Masci et al., 2019)) 20230412.8225 <160c (Yutaka Maeda) 20230414.5398 17.083g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230415.4498 17.380zg (ZTF Alert DC mag (Masci+ 2019)) 20230415.4498 17.604zg (Zwicky Transient Facility (Masci et al., 2019)) 20230415.4876 17.213zr (Zwicky Transient Facility (Masci et al., 2019)) 20230416.5342 16.952g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230416.8183 <153c (Yutaka Maeda) 20230419.4480 17.253zr (Zwicky Transient Facility (Masci et al., 2019)) 20230422.5200 15.844g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230425.5159 16.361g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230427.4057 16.450g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230501.3995 16.553zr (Zwicky Transient Facility (Masci et al., 2019)) 20230501.3995 16.578zr (ZTF Alert DC mag (Masci+ 2019)) 20230501.4461 16.748zg (Zwicky Transient Facility (Masci et al., 2019)) 20230502.8056 <156c (Yutaka Maeda) 20230505.4995 16.133g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230505.4995 16.189g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230507.4821 16.665g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230508.4783 16.666g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230508.5591 16.595g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230509.4056 16.834zr (ZTF Alert DC mag (Masci+ 2019)) 20230509.4338 16.903zg (ZTF Alert DC mag (Masci+ 2019)) 20230509.8009 <155c (Yutaka Maeda) 20230511.8224 <147c (Yutaka Maeda) 20230513.4098 16.186zg (ZTF Alert DC mag (Masci+ 2019)) 20230513.4425 16.149zr (ZTF Alert DC mag (Masci+ 2019)) 20230515.4238 16.341zr (ZTF Alert DC mag (Masci+ 2019)) 20230515.4438 16.420zg (ZTF Alert DC mag (Masci+ 2019)) 20230516.8096 <141c (Yutaka Maeda) 20230518.4491 16.564zr (ZTF Alert DC mag (Masci+ 2019)) 20230520.4098 16.417zr (ZTF Alert DC mag (Masci+ 2019)) 20230520.4226 16.404zg (ZTF Alert DC mag (Masci+ 2019)) 20230522.4324 16.440zg (ZTF Alert DC mag (Masci+ 2019)) 20230525.4301 16.614zg (ZTF Alert DC mag (Masci+ 2019)) 20230525.4541 16.528zr (ZTF Alert DC mag (Masci+ 2019)) 20230528.3466 16.538zg (ZTF Alert DC mag (Masci+ 2019)) 20230531.3061 16.799g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230601.3888 16.796g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230602.3736 <16.498g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230602.7476 <153c (Yutaka Maeda) 20230603.4166 16.468zr (ZTF Alert DC mag (Masci+ 2019)) 20230603.4507 16.576zg (ZTF Alert DC mag (Masci+ 2019)) 20230603.7506 <163c (Yutaka Maeda) 20230605.4305 16.447zr (ZTF Alert DC mag (Masci+ 2019)) 20230605.4473 16.535zg (ZTF Alert DC mag (Masci+ 2019)) 20230607.3498 <16.268g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230608.3504 16.466g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230615.3714 16.295g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230615.7186 159:c (Yutaka Maeda) 20230615.7186 159:c (Yutaka Maeda) 20230617.4447 16.428g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230623.4679 16.534g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230627.3354 16.511g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230628.3442 16.501g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230629.4415 16.422g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230701.4886 16.364g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230703.2709 <16.177g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230707.1433 15.95cG (Masao Funada) 20230707.5404 16.161g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230708.1545 16.28cG (Masao Funada) 20230709.3671 16.430g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) [View Less]

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[vsnet-campaign-dn 17400] PNV J18553862+1457343: new WZ Sge-type dwarf nova
by Taichi Kato 07 Jul '23

07 Jul '23

PNV J18553862+1457343: new WZ Sge-type dwarf nova Early superhumps: P=0.06080(4) d, amplitude 0.04 mag. Ordinary superhumps (stage A?): P=0.06282(10) d, 0.07 mag. Corresponding q=0.088 Likely period bouncer with multiple rebeightenings. Observers: Itoh-san, Stephen Brincat, Josch Hambsch, Tamas Tordai

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