September 2021 - vsnet-alert - ooruri.kusastro.kyoto-u.ac.jp

[vsnet-alert 26240] V544 Her double outburst continues
by Taichi Kato 14 Sep '21

14 Sep '21

V544 Her double outburst continues YYYYMMDD(UT) mag observer 20210819.5030 <156c (Yutaka Maeda) 20210820.5016 <146c (Yutaka Maeda) 20210824.1742 15.119zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210824.1938 14.913zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210826.1947 15.308zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210827.5030 151:c (Yutaka Maeda) 20210828.1876 15.252zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210828.1877 15.252zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210828.2713 15.354zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210828.2715 15.354zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210828.901 15.30C (Gary Poyner) 20210828.9028 15.22C (Masao Funada) 20210829.4567 157:cG (Yutaka Maeda) 20210830.8756 16.63C (Masao Funada) 20210831.2067 16.965zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210831.2069 16.965zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210831.4373 <164c (Yutaka Maeda) 20210831.5071 <166C (Masayuki Moriyama) 20210903.2085 17.666zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210903.2086 17.666zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210903.2667 17.995zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210905.1945 15.505zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210907.2273 15.298zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210907.2275 15.298zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210908.4314 155:c (Yutaka Maeda) 20210909.1497 15.498zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210909.4912 150cG (Yutaka Maeda) 20210911.1659 15.415zg (Zwicky Transient Facility Lasair (Masci+ 2019))

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[vsnet-alert 26239] ASASSN-18vb outburst
by Taichi Kato 14 Sep '21

14 Sep '21

ASASSN-18vb outburst SS Cyg star or a superoutburst? Time-resolved observations are desirable. YYYYMMDD(UT) mag observer 20210621.4470 20.679zg (Zwicky Transient Facility (Masci et al., 2019)) 20210625.3917 20.246zr (Zwicky Transient Facility (Masci et al., 2019)) 20210628.4482 20.847zr (Zwicky Transient Facility (Masci et al., 2019)) 20210908.3184 14.816zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210908.3185 14.816zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210908.3704 15.040zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210908.3706 15.040zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210910.3879 15.021zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210910.4309 14.733zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210910.4311 14.733zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210912.3542 14.729zg (Zwicky Transient Facility Lasair (Masci+ 2019))

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[vsnet-alert 26238] ASASSN-21rm: new likely WZ Sge-type dwarf nova
by Taichi Kato 13 Sep '21

13 Sep '21

ASASSN-21rm: new likely WZ Sge-type dwarf nova Tamas Tordai has reported observations. The object showed humps on Sep. 11. The period was 0.0548(6) d and the amplitude was 0.14 mag. The profile resembles that of early superhumps. Combined with the large outburst amplitude, this object is likely a WZ Sge star.

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[vsnet-alert 26237] ASASSN-17ik: new SU UMa-type dwarf nova
by Taichi Kato 13 Sep '21

13 Sep '21

ASASSN-17ik: new SU UMa-type dwarf nova Tamas Tordai has reported observations. The object showed superhumps on Sep. 9. The period was 0.0591(6) d and the amplitude was 0.14 mag. This confirms the suggestion in vsnet-alert 26221.

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[vsnet-alert 26236] DDE 139 outburst
by Taichi Kato 10 Sep '21

10 Sep '21

DDE 139 outburst YYYYMMDD(UT) mag observer 20210622.2109 20.197zr (Zwicky Transient Facility (Masci et al., 2019)) 20210628.1906 20.372zr (Zwicky Transient Facility (Masci et al., 2019)) 20210704.2402 16.218zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210704.2404 16.218zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210706.2116 17.563zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210706.2118 17.563zg (Zwicky Transient Facility Lasair (Masci+ 2019))

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[vsnet-alert 26235] AXJ1853.3-0128: bright outburst in 2019 Aug.
by Taichi Kato 10 Sep '21

10 Sep '21

AXJ1853.3-0128: bright outburst in 2019 Aug. ZTF data. Reached 12.9 mag. The duration is that of a normal outburst of this orbital period, not a short IP-type outburst. Should be reclassified as UG+DQ.

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[vsnet-alert 26234] MGAB-V305 possible superoutburst
by Taichi Kato 10 Sep '21

10 Sep '21

MGAB-V305 possible superoutburst Type from ZTF data. YYYYMMDD(UT) mag observer 20210908.2028 16.555zr (Zwicky Transient Facility Lasair (Masci+ 2019))

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[vsnet-alert 26233] V544 Her double outburst!
by Taichi Kato 10 Sep '21

10 Sep '21

V544 Her double outburst! Precusor on Aug. 28? The current outburst may be a superoutburst. Time-resolved photometry is encouraged. This object is suspected to be an SU UMa star above the period gap. See: https://ui.adsabs.harvard.edu/abs/2019PASJ...71L...4K/abstract YYYYMMDD(UT) mag observer 20210819.5030 <156c (Yutaka Maeda) 20210820.5016 <146c (Yutaka Maeda) 20210827.5030 151:c (Yutaka Maeda) 20210828.1876 15.252zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210828.2713 15.354zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210828.901 15.30C (Gary Poyner) 20210828.9028 15.22C (Masao Funada) 20210829.4567 157:cG (Yutaka Maeda) 20210830.8756 16.63C (Masao Funada) 20210831.2067 16.965zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210831.4373 <164c (Yutaka Maeda) 20210831.5071 <166C (Masayuki Moriyama) 20210903.2085 17.666zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210907.2273 15.298zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210909.1497 15.498zr (Zwicky Transient Facility Lasair (Masci+ 2019))

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[vsnet-alert 26232] DDE169 outburst
by Taichi Kato 10 Sep '21

10 Sep '21

DDE169 outburst YYYYMMDD(UT) mag observer 20210729.626 <168C (Mitsutaka Hiraga) 20210731.3827 17.484zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210731.3828 17.484zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210731.4559 17.455zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210731.4559 17.494zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210802.4490 17.614zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210808.3674 18.082zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210808.3675 18.082zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210909.3836 15.073zr (Zwicky Transient Facility Lasair (Masci+ 2019))

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[vsnet-alert 26231] CRTS J202857.1-061803 possible superoutburst
by Taichi Kato 10 Sep '21

10 Sep '21

CRTS J202857.1-061803 possible superoutburst SU UMa candidate (from ZTF data). YYYYMMDD(UT) mag observer 20210828.4653 <148c (Yutaka Maeda) 20210828.5732 <169C (Masayuki Moriyama) 20210908.1900 15.009zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210909.3393 15.028zr (Zwicky Transient Facility Lasair (Masci+ 2019))

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vsnet-alert September 2021