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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 to be a superoutburst and time-resolved photometry is encouraged. YYYYMMDD(UT) mag observer 20230705.8343 <16.309g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230705.8535 <16.794g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230707.3509 15.533g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230707.4367 15.660g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230708.3381 15.626g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230709.1767 15.869g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014))

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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; 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))

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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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[vsnet-campaign-dn 17399] HO Del superoutburst
by Taichi Kato 03 Jul '23

03 Jul '23

HO Del superoutburst (Known SU UMa star) YYYYMMDD(UT) mag observer 20230623.0146 <144 (Eddy Muyllaert) 20230623.4563 16.066g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230624.0194 137 (Eddy Muyllaert) 20230624.033 139 (Gary Poyner) 20230625.0222 136 (Eddy Muyllaert) 20230625.056 138 (Gary Poyner) 20230625.139 14.03C (Gary Poyner) 20230625.1402 14.07cG (Masao Funada) 20230625.4061 13.763g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230626.060 140 (Gary Poyner) 20230628.1662 13.935g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230628.2162 13.997g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230628.2689 13.791g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230629.3589 14.120g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230630.3508 14.202g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230630.3620 14.19cG (Masao Funada) 20230701.3654 14.62cG (Masao Funada) 20230701.3676 14.293g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014))

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[vsnet-campaign-dn 17398] ASASSN-15aq superoutburst
by Taichi Kato 03 Jul '23

03 Jul '23

ASASSN-15aq superoutburst YYYYMMDD(UT) mag observer 20230623.0403 17.860g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230624.2844 <18.036g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230628.2786 13.812g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230629.3028 13.653g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230630.2952 13.469g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230701.3827 13.69cG (Masao Funada) 20230702.0130 13.574g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230702.2698 13.707g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014))

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[vsnet-campaign-dn 17397] Re: FL Psc: rapid fading on June 26
by Taichi Kato 01 Jul '23

01 Jul '23

Re: FL Psc: rapid fading on June 26 Recent data: YYYYMMDD(UT) mag observer 20230622.2089 123cG (Masao Funada) 20230623.210 12.11C (Gary Poyner) 20230623.5319 12.123g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230624.197 12.20C (Gary Poyner) 20230625.208 12.38C (Gary Poyner) 20230626.5207 13.652g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230627.208 14.75C (Gary Poyner) 20230628.3570 15.245g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014))

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[vsnet-campaign-dn 17396] V803 Cen another superoutburst
by Taichi Kato 01 Jul '23

01 Jul '23

V803 Cen another superoutburst Josch Hambsch reported further observations. Another superoutburst started on June 25-26 and superhumps are clearly present.

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[vsnet-campaign-dn 17395] V725 Aql rebrightening on June 29
by Taichi Kato 01 Jul '23

01 Jul '23

V725 Aql rebrightening on June 29 Josch Hambsch reported further observations. There was a rebrightening at 15.7 mag on June 29 (it was already fading).

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[vsnet-campaign-dn 17394] FL Psc: rapid fading on June 26
by Taichi Kato 01 Jul '23

01 Jul '23

FL Psc: rapid fading on June 26 Josch Hambsch reported further observations. The object started fading on June 25 and now at mag 15.0. We probably observed the growth of stage C superhumps and the behavior is not particularly different from the 2004 superoutburst. A rebrightening is expected.

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