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[vsnet-campaign-dn 16798] LS And: missed superoutburst in 2022!
by Taichi Kato 03 Jan '23

03 Jan '23

LS And: missed superoutburst in 2022! (I'm checking ASAS-SN) The outburst occurred close to the solar conjunction and was apparently not monitored by visual observers. The outburst of clearly of a WZ Sge-type one whose peak was missed. There was no rebrightening (object probably close to the period minimum). The object is currently still on the fading tail, about 1.5 mag brighter than in quiescence before the 2022 outburst. Observations of the white dwarf will still be interesting before it cools down. YYYYMMDD(UT) mag observer 20220425.4963 13.922zr (Zwicky Transient Facility (Masci et al., 2019)) 20220425.4986 13.986zr (Zwicky Transient Facility (Masci et al., 2019)) 20220425.5010 14.102zr (Zwicky Transient Facility (Masci et al., 2019)) 20220427.4928 14.266zr (Zwicky Transient Facility (Masci et al., 2019)) 20220427.4928 14.277zr (ZTF Alert DC mag (Masci+ 2019)) 20220427.4952 14.353zr (Zwicky Transient Facility (Masci et al., 2019)) 20220427.4952 14.356zr (ZTF Alert DC mag (Masci+ 2019)) 20220427.4976 14.312zr (ZTF Alert DC mag (Masci+ 2019)) 20220427.4976 14.336zr (Zwicky Transient Facility (Masci et al., 2019)) 20220427.4999 14.266zr (ZTF Alert DC mag (Masci+ 2019)) 20220427.4999 14.271zr (Zwicky Transient Facility (Masci et al., 2019)) 20220427.5023 14.374zr (Zwicky Transient Facility (Masci et al., 2019)) 20220428.4924 14.470zr (ZTF Alert DC mag (Masci+ 2019)) 20220428.4924 14.479zr (Zwicky Transient Facility (Masci et al., 2019)) 20220428.4947 14.466zr (ZTF Alert DC mag (Masci+ 2019)) 20220428.4947 14.470zr (Zwicky Transient Facility (Masci et al., 2019)) 20220428.4971 14.465zr (ZTF Alert DC mag (Masci+ 2019)) 20220428.4971 14.478zr (Zwicky Transient Facility (Masci et al., 2019)) 20220428.4995 14.437zr (ZTF Alert DC mag (Masci+ 2019)) 20220428.4995 14.451zr (Zwicky Transient Facility (Masci et al., 2019)) 20220428.5019 14.459zr (ZTF Alert DC mag (Masci+ 2019)) 20220428.5019 14.467zr (Zwicky Transient Facility (Masci et al., 2019)) 20220429.4900 14.580zr (ZTF Alert DC mag (Masci+ 2019)) 20220429.4900 14.586zr (Zwicky Transient Facility (Masci et al., 2019)) 20220429.4924 14.569zr (ZTF Alert DC mag (Masci+ 2019)) 20220429.4924 14.575zr (Zwicky Transient Facility (Masci et al., 2019)) 20220429.4948 14.598zr (ZTF Alert DC mag (Masci+ 2019)) 20220429.4948 14.609zr (Zwicky Transient Facility (Masci et al., 2019)) 20220429.4973 14.590zr (ZTF Alert DC mag (Masci+ 2019)) 20220429.4973 14.597zr (Zwicky Transient Facility (Masci et al., 2019)) 20220429.4997 14.589zr (ZTF Alert DC mag (Masci+ 2019)) 20220429.4997 14.602zr (Zwicky Transient Facility (Masci et al., 2019)) 20220430.4907 14.663zr (ZTF Alert DC mag (Masci+ 2019)) 20220430.4907 14.668zr (Zwicky Transient Facility (Masci et al., 2019)) 20220430.4931 14.668zr (ZTF Alert DC mag (Masci+ 2019)) 20220430.4931 14.677zr (Zwicky Transient Facility (Masci et al., 2019)) 20220430.4956 14.644zr (ZTF Alert DC mag (Masci+ 2019)) 20220430.4956 14.653zr (Zwicky Transient Facility (Masci et al., 2019)) 20220430.4980 14.671zr (ZTF Alert DC mag (Masci+ 2019)) 20220430.4980 14.685zr (Zwicky Transient Facility (Masci et al., 2019)) 20220430.5004 14.692zr (ZTF Alert DC mag (Masci+ 2019)) 20220430.5004 14.705zr (Zwicky Transient Facility (Masci et al., 2019)) 20220501.4897 14.780zr (Zwicky Transient Facility (Masci et al., 2019)) 20220501.4897 14.785zr (ZTF Alert DC mag (Masci+ 2019)) 20220501.4921 14.783zr (ZTF Alert DC mag (Masci+ 2019)) 20220501.4921 14.792zr (Zwicky Transient Facility (Masci et al., 2019)) 20220501.4945 14.762zr (ZTF Alert DC mag (Masci+ 2019)) 20220501.4945 14.766zr (Zwicky Transient Facility (Masci et al., 2019)) 20220501.4969 14.745zr (ZTF Alert DC mag (Masci+ 2019)) 20220501.4969 14.751zr (Zwicky Transient Facility (Masci et al., 2019)) 20220501.4994 14.764zr (ZTF Alert DC mag (Masci+ 2019)) 20220501.4994 14.774zr (Zwicky Transient Facility (Masci et al., 2019)) 20220502.4882 14.646zg (ZTF Alert DC mag (Masci+ 2019)) 20220502.4882 14.662zg (Zwicky Transient Facility (Masci et al., 2019)) 20220502.4905 14.581zg (ZTF Alert DC mag (Masci+ 2019)) 20220502.4905 14.595zg (Zwicky Transient Facility (Masci et al., 2019)) 20220502.4929 14.661zg (ZTF Alert DC mag (Masci+ 2019)) 20220502.4929 14.690zg (Zwicky Transient Facility (Masci et al., 2019)) 20220502.4953 14.669zg (ZTF Alert DC mag (Masci+ 2019)) 20220502.4953 14.706zg (Zwicky Transient Facility (Masci et al., 2019)) 20220502.4976 14.716zg (ZTF Alert DC mag (Masci+ 2019)) 20220502.4976 14.746zg (Zwicky Transient Facility (Masci et al., 2019)) 20220503.4889 14.923zr (Zwicky Transient Facility (Masci et al., 2019)) 20220503.4913 14.882zr (Zwicky Transient Facility (Masci et al., 2019)) 20220503.4937 14.891zr (Zwicky Transient Facility (Masci et al., 2019)) 20220503.4961 14.822zr (Zwicky Transient Facility (Masci et al., 2019)) 20220503.4986 14.760zr (Zwicky Transient Facility (Masci et al., 2019)) 20220508.4837 15.421zr (Zwicky Transient Facility (Masci et al., 2019)) 20220508.4861 15.421zr (Zwicky Transient Facility (Masci et al., 2019)) 20220508.4886 15.437zr (Zwicky Transient Facility (Masci et al., 2019)) 20220508.4910 15.466zr (Zwicky Transient Facility (Masci et al., 2019)) 20220509.4825 15.509zr (ZTF Alert DC mag (Masci+ 2019)) 20220509.4825 15.556zr (Zwicky Transient Facility (Masci et al., 2019)) 20220509.4849 15.485zr (ZTF Alert DC mag (Masci+ 2019)) 20220509.4849 15.506zr (Zwicky Transient Facility (Masci et al., 2019)) 20220509.4874 15.416zr (ZTF Alert DC mag (Masci+ 2019)) 20220509.4874 15.431zr (Zwicky Transient Facility (Masci et al., 2019)) 20220509.4898 15.424zr (ZTF Alert DC mag (Masci+ 2019)) 20220509.4898 15.429zr (Zwicky Transient Facility (Masci et al., 2019)) 20220509.4922 15.397zr (ZTF Alert DC mag (Masci+ 2019)) 20220509.4922 15.423zr (Zwicky Transient Facility (Masci et al., 2019)) 20220510.4818 15.537zr (ZTF Alert DC mag (Masci+ 2019)) 20220510.4818 15.602zr (Zwicky Transient Facility (Masci et al., 2019)) 20220510.4842 15.451zr (ZTF Alert DC mag (Masci+ 2019)) 20220510.4842 15.544zr (Zwicky Transient Facility (Masci et al., 2019)) 20220510.4866 15.587zr (ZTF Alert DC mag (Masci+ 2019)) 20220510.4866 15.620zr (Zwicky Transient Facility (Masci et al., 2019)) 20220510.4891 15.500zr (ZTF Alert DC mag (Masci+ 2019)) 20220510.4891 15.517zr (Zwicky Transient Facility (Masci et al., 2019)) 20220510.4915 15.746zr (ZTF Alert DC mag (Masci+ 2019)) 20220510.4915 15.822zr (Zwicky Transient Facility (Masci et al., 2019)) 20220511.4823 15.507zr (ZTF Alert DC mag (Masci+ 2019)) 20220511.4823 15.535zr (Zwicky Transient Facility (Masci et al., 2019)) 20220511.4847 15.510zr (ZTF Alert DC mag (Masci+ 2019)) 20220511.4847 15.527zr (Zwicky Transient Facility (Masci et al., 2019)) 20220511.4871 15.488zr (ZTF Alert DC mag (Masci+ 2019)) 20220511.4871 15.508zr (Zwicky Transient Facility (Masci et al., 2019)) 20220511.4896 15.535zr (ZTF Alert DC mag (Masci+ 2019)) 20220511.4896 15.543zr (Zwicky Transient Facility (Masci et al., 2019)) 20220511.4920 15.534zr (ZTF Alert DC mag (Masci+ 2019)) 20220511.4920 15.569zr (Zwicky Transient Facility (Masci et al., 2019)) 20220512.4800 15.734zr (ZTF Alert DC mag (Masci+ 2019)) 20220512.4800 15.752zr (Zwicky Transient Facility (Masci et al., 2019)) 20220512.4809 15.813zr (Zwicky Transient Facility (Masci et al., 2019)) 20220512.4824 15.775zr (Zwicky Transient Facility (Masci et al., 2019)) 20220512.4833 15.713zr (Zwicky Transient Facility (Masci et al., 2019)) 20220512.4847 15.762zr (Zwicky Transient Facility (Masci et al., 2019)) 20220512.4857 15.744zr (Zwicky Transient Facility (Masci et al., 2019)) 20220512.4871 15.809zr (Zwicky Transient Facility (Masci et al., 2019)) 20220512.4880 15.689zr (ZTF Alert DC mag (Masci+ 2019)) 20220512.4880 15.727zr (Zwicky Transient Facility (Masci et al., 2019)) 20220512.4895 15.728zr (Zwicky Transient Facility (Masci et al., 2019)) 20220512.4904 15.744zr (Zwicky Transient Facility (Masci et al., 2019)) 20220512.5959 15.738c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20220512.6130 15.658c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20220512.6158 15.565c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20220513.4806 15.773zr (ZTF Alert DC mag (Masci+ 2019)) 20220513.4806 15.776zr (Zwicky Transient Facility (Masci et al., 2019)) 20220513.4816 15.763zr (ZTF Alert DC mag (Masci+ 2019)) 20220513.4816 15.798zr (Zwicky Transient Facility (Masci et al., 2019)) 20220513.4830 15.780zr (ZTF Alert DC mag (Masci+ 2019)) 20220513.4830 15.791zr (Zwicky Transient Facility (Masci et al., 2019)) 20220513.4839 15.774zr (ZTF Alert DC mag (Masci+ 2019)) 20220513.4839 15.804zr (Zwicky Transient Facility (Masci et al., 2019)) 20220513.4854 15.804zr (ZTF Alert DC mag (Masci+ 2019)) 20220513.4854 15.805zr (Zwicky Transient Facility (Masci et al., 2019)) 20220513.4863 15.775zr (ZTF Alert DC mag (Masci+ 2019)) 20220513.4863 15.795zr (Zwicky Transient Facility (Masci et al., 2019)) 20220513.4877 15.776zr (ZTF Alert DC mag (Masci+ 2019)) 20220513.4877 15.787zr (Zwicky Transient Facility (Masci et al., 2019)) 20220513.4887 15.766zr (ZTF Alert DC mag (Masci+ 2019)) 20220513.4887 15.794zr (Zwicky Transient Facility (Masci et al., 2019)) 20220513.4901 15.797zr (ZTF Alert DC mag (Masci+ 2019)) 20220513.4901 15.808zr (Zwicky Transient Facility (Masci et al., 2019)) 20220513.4910 15.766zr (ZTF Alert DC mag (Masci+ 2019)) 20220513.4910 15.806zr (Zwicky Transient Facility (Masci et al., 2019)) 20220514.4802 15.850zr (ZTF Alert DC mag (Masci+ 2019)) 20220514.4802 15.859zr (Zwicky Transient Facility (Masci et al., 2019)) 20220514.4811 15.853zr (Zwicky Transient Facility (Masci et al., 2019)) 20220514.4825 15.764zr (ZTF Alert DC mag (Masci+ 2019)) 20220514.4825 15.784zr (Zwicky Transient Facility (Masci et al., 2019)) 20220514.4835 15.880zr (ZTF Alert DC mag (Masci+ 2019)) 20220514.4835 15.918zr (Zwicky Transient Facility (Masci et al., 2019)) 20220514.4849 15.821zr (Zwicky Transient Facility (Masci et al., 2019)) 20220514.4849 15.824zr (ZTF Alert DC mag (Masci+ 2019)) 20220514.4858 15.794zr (ZTF Alert DC mag (Masci+ 2019)) 20220514.4858 15.816zr (Zwicky Transient Facility (Masci et al., 2019)) 20220514.4873 15.833zr (ZTF Alert DC mag (Masci+ 2019)) 20220514.4873 15.842zr (Zwicky Transient Facility (Masci et al., 2019)) 20220514.4882 15.818zr (ZTF Alert DC mag (Masci+ 2019)) 20220514.4882 15.847zr (Zwicky Transient Facility (Masci et al., 2019)) 20220514.4896 15.846zr (ZTF Alert DC mag (Masci+ 2019)) 20220514.4896 15.850zr (Zwicky Transient Facility (Masci et al., 2019)) 20220514.4906 15.833zr (ZTF Alert DC mag (Masci+ 2019)) 20220514.4906 15.852zr (Zwicky Transient Facility (Masci et al., 2019)) 20220515.4804 16.485zr (ZTF Alert DC mag (Masci+ 2019)) 20220515.4804 16.503zr (Zwicky Transient Facility (Masci et al., 2019)) 20220515.4828 16.485zr (ZTF Alert DC mag (Masci+ 2019)) 20220515.4828 16.496zr (Zwicky Transient Facility (Masci et al., 2019)) 20220515.4853 16.447zr (ZTF Alert DC mag (Masci+ 2019)) 20220515.4853 16.465zr (Zwicky Transient Facility (Masci et al., 2019)) 20220515.4877 16.470zr (ZTF Alert DC mag (Masci+ 2019)) 20220515.4877 16.486zr (Zwicky Transient Facility (Masci et al., 2019)) 20220515.4901 16.500zr (ZTF Alert DC mag (Masci+ 2019)) 20220515.4901 16.526zr (Zwicky Transient Facility (Masci et al., 2019)) 20220519.4762 18.193zr (ZTF Alert DC mag (Masci+ 2019)) 20220519.4762 18.223zr (Zwicky Transient Facility (Masci et al., 2019)) 20220519.4786 18.130zr (ZTF Alert DC mag (Masci+ 2019)) 20220519.4786 18.148zr (Zwicky Transient Facility (Masci et al., 2019)) 20220519.4809 18.132zr (ZTF Alert DC mag (Masci+ 2019)) 20220519.4809 18.175zr (Zwicky Transient Facility (Masci et al., 2019)) 20220519.4833 18.156zr (ZTF Alert DC mag (Masci+ 2019)) 20220519.4833 18.179zr (Zwicky Transient Facility (Masci et al., 2019)) 20220519.4856 18.186zr (ZTF Alert DC mag (Masci+ 2019)) 20220519.4856 18.249zr (Zwicky Transient Facility (Masci et al., 2019)) 20220520.4664 18.361zr (ZTF Alert DC mag (Masci+ 2019)) 20220520.4664 18.366zr (Zwicky Transient Facility (Masci et al., 2019)) 20220520.4684 18.284zr (ZTF Alert DC mag (Masci+ 2019)) 20220520.4684 18.323zr (Zwicky Transient Facility (Masci et al., 2019)) 20220520.4704 18.214zr (ZTF Alert DC mag (Masci+ 2019)) 20220520.4704 18.261zr (Zwicky Transient Facility (Masci et al., 2019)) 20220520.4723 18.431zr (Zwicky Transient Facility (Masci et al., 2019)) 20220520.4743 18.199zr (ZTF Alert DC mag (Masci+ 2019)) 20220520.4743 18.202zr (Zwicky Transient Facility (Masci et al., 2019)) 20220520.4762 18.121zr (Zwicky Transient Facility (Masci et al., 2019)) 20220520.4762 18.153zr (ZTF Alert DC mag (Masci+ 2019)) 20220520.4786 18.126zr (ZTF Alert DC mag (Masci+ 2019)) 20220520.4786 18.169zr (Zwicky Transient Facility (Masci et al., 2019)) 20220520.4810 18.028zr (ZTF Alert DC mag (Masci+ 2019)) 20220520.4810 18.082zr (Zwicky Transient Facility (Masci et al., 2019)) 20220520.4833 17.912zr (Zwicky Transient Facility (Masci et al., 2019)) 20220520.4833 17.932zr (ZTF Alert DC mag (Masci+ 2019)) 20220520.4857 17.920zr (Zwicky Transient Facility (Masci et al., 2019)) 20220521.4657 18.247zr (ZTF Alert DC mag (Masci+ 2019)) 20220521.4657 18.266zr (Zwicky Transient Facility (Masci et al., 2019)) 20220521.4676 18.314zr (ZTF Alert DC mag (Masci+ 2019)) 20220521.4676 18.322zr (Zwicky Transient Facility (Masci et al., 2019)) 20220521.4695 18.306zr (ZTF Alert DC mag (Masci+ 2019)) 20220521.4695 18.317zr (Zwicky Transient Facility (Masci et al., 2019)) 20220521.4715 18.292zr (ZTF Alert DC mag (Masci+ 2019)) 20220521.4715 18.322zr (Zwicky Transient Facility (Masci et al., 2019)) 20220521.4734 18.308zr (Zwicky Transient Facility (Masci et al., 2019)) 20220521.4734 18.309zr (ZTF Alert DC mag (Masci+ 2019)) 20220521.4748 18.367zr (ZTF Alert DC mag (Masci+ 2019)) 20220521.4748 18.381zr (Zwicky Transient Facility (Masci et al., 2019)) 20220521.4767 18.347zr (ZTF Alert DC mag (Masci+ 2019)) 20220521.4767 18.400zr (Zwicky Transient Facility (Masci et al., 2019)) 20220521.4791 18.352zr (ZTF Alert DC mag (Masci+ 2019)) 20220521.4791 18.362zr (Zwicky Transient Facility (Masci et al., 2019)) 20220521.4815 18.386zr (ZTF Alert DC mag (Masci+ 2019)) 20220521.4815 18.387zr (Zwicky Transient Facility (Masci et al., 2019)) 20220521.4839 18.334zr (ZTF Alert DC mag (Masci+ 2019)) 20220521.4839 18.337zr (Zwicky Transient Facility (Masci et al., 2019))

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[vsnet-campaign-dn 16797] Z Cam fading from standstill
by Taichi Kato 03 Jan '23

03 Jan '23

Z Cam fading from standstill YYYYMMDD(UT) mag observer 20221226.7618 116 (Eddy Muyllaert) 20221227.049 116 (Gary Poyner) 20221227.6697 112cG (Yutaka Maeda) 20221227.6697 112cG (Yutaka Maeda) 20221227.792 11.68 (Pavol A. Dubovsky) 20221229.8181 120 (Eddy Muyllaert) 20221231.6615 125cG (Yutaka Maeda) 20221231.6615 125cG (Yutaka Maeda) 20221231.7454 12.64C (Masayuki Moriyama) 20230102.407 <125 (Takuichiro Onishi)

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[vsnet-campaign-dn 16796] CRTSJ000024.7+332543 superhumps and eclipse?
by Taichi Kato 03 Jan '23

03 Jan '23

CRTSJ000024.7+332543 superhumps and eclipse? Itoh-san reported further observations. The superhump period is 0.09325(8) d or its alias (amplitude 0.23 mag). An eclipse-like feature was again seen on Jan. 1. This object may be UGSU+E.

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[vsnet-campaign-dn 16795] ASASSN-22ak stopped fading
by Taichi Kato 02 Jan '23

02 Jan '23

ASASSN-22ak stopped fading According to observations by Josch Hambsch, this object has been around 19.0 for the last four nights.

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[vsnet-campaign-dn 16794] MASTER OT J054111.82+454054.9 rare? outburst
by Taichi Kato 02 Jan '23

02 Jan '23

MASTER OT J054111.82+454054.9 rare? outburst Only one outburst detection in the ZTF data. YYYYMMDD(UT) mag observer 20221225.5741 <154c (Yutaka Maeda) 20221227.6662 <175C (Masayuki Moriyama) 20221227.7269 <148c (Yutaka Maeda) 20221231.8153 159:C (Masayuki Moriyama)

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[vsnet-campaign-dn 16793] CRTSJ000024.7+332543 superhumps
by Taichi Kato 02 Jan '23

02 Jan '23

CRTSJ000024.7+332543 superhumps Itoh-san confirmed superhumps on the second night. There was no hint of an eclipse.

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[vsnet-campaign-dn 16792] CRTSJ000024.7+332543: superhump and eclipse?
by Taichi Kato 01 Jan '23

01 Jan '23

CRTSJ000024.7+332543: superhump and eclipse? Itoh-san reported observations and detected a 0.3-mag superhump. There was an eclipse-like episode which needs to be confirmed.

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[vsnet-campaign-dn 16791] AY Lac rapidly faded
by Taichi Kato 30 Dec '22

30 Dec '22

AY Lac rapidly faded YYYYMMDD(UT) mag observer 20221220.5363 <139cG (Yutaka Maeda) 20221222.1777 16.273zg (ZTF Alert DC mag (Masci+ 2019)) 20221222.2272 16.306zr (ZTF Alert DC mag (Masci+ 2019)) 20221223.797 163C (Jeremy Shears) 20221224.857 17.21C (Gary Poyner) 20221225.413 18.27C (Hiroshi Itoh) 20221225.4545 <146c (Yutaka Maeda) 20221225.5029 <141cG (Yutaka Maeda) 20221225.5580 <173C (Masayuki Moriyama) 20221226.5805 <167C (Masayuki Moriyama)

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[vsnet-campaign-dn 16790] WX Hyi superoutburst
by Taichi Kato 30 Dec '22

30 Dec '22

WX Hyi superoutburst YYYYMMDD(UT) mag observer 20221222.596 147 (Rod Stubbings) 20221224.619 157 (Rod Stubbings) 20221225.582 155 (Rod Stubbings) 20221226.569 147 (Rod Stubbings) 20221227.578 123 (Rod Stubbings) 20221229.603 116 (Rod Stubbings)

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[vsnet-campaign-dn 16789] ASASSN-22ak: very rapid fading!
by Taichi Kato 30 Dec '22

30 Dec '22

ASASSN-22ak: very rapid fading! Josch Hambsch has reported further observations. Although no definite superhump signal has been detected, the object suddenly faded by 1.8 mag on Dec. 29 (probably more than 2 mag/d since there was no hint of fading during Dec. 28 observations). This fading supports my second interpretation as an AM CVn star. The object is still expected to be detectable and please continue observations.

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