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[vsnet-campaign-dn 15944] PNV J21581852+2419246 superoutburst (since Aug. 27)
by Patrick Schmeer 17 Sep '21

17 Sep '21

PNV J21581852+2419246 (UGSU) https://www.aavso.org/vsx/index.php?view=detail.top&oid=270725 Bright since 2021 August 27.470 UT (orange mag. 14.5) according to ATLAS data (last non-detection on Aug. 25.399 UT; orange mag. 16.0 on September 4.46 UT). Time-resolved photometry is encouraged. Clear skies, Patrick ------------ References: Asteroid Terrestrial-impact Last Alert System (ATLAS): - Tonry et al., 2018PASP..130f4505T --------------------------------------------- Gary Poyner wrote on Saturday, 4 September 2021 at 15:26:11 UTC: The UGSU star OT J215818.5+241925 (PNV J21581852+2419246) is in outburst. The first detected since September 2018... September 03.940 14.903CV Open University COAST regards, Gary

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[vsnet-campaign-dn 15994] ASASSN-19ax possible superoutburst
by Taichi Kato 17 Sep '21

17 Sep '21

ASASSN-19ax possible superoutburst Suspected type from ZTF + ASAS-SN data. YYYYMMDD(UT) mag observer 20210906.9583 <142 (Eddy Muyllaert) 20210908.9069 <142 (Eddy Muyllaert) 20210909.9368 <142 (Eddy Muyllaert) 20210910.9194 128 (Eddy Muyllaert) 20210911.8451 127 (Eddy Muyllaert) 20210911.883 12.73C (Gary Poyner) 20210915.9076 128 (Eddy Muyllaert)

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[vsnet-campaign-dn 15993] LL And: early superhumps
by Taichi Kato 17 Sep '21

17 Sep '21

LL And: early superhumps Crimean Astrophys. Obs. team has reported observations. The combined data yielded a period of 0.0552(1) d, in agreement with the orbital period of 0.055055 d. The profile is doubly humped and the amplitude was 0.025 mag. Further observations are encouraged.

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[vsnet-campaign-dn 15992] LL And variation
by Taichi Kato 16 Sep '21

16 Sep '21

LL And variation Kyoto U. team and Tamas Tordai have reported observations. Although some variations were present, the period was not the same as the orbital period. Since the runs were not very long, more observations would clarify whether they were early superhumps or not.

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[vsnet-campaign-dn 15990] ASASSN-18vb: new SU UMa-type dwarf nova
by Taichi Kato 15 Sep '21

15 Sep '21

ASASSN-18vb: new SU UMa-type dwarf nova Tamas Tordai has reported observations. The object shows superhumps with a period of 0.0832(7) d and an amplitude of 0.21 mag.

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[vsnet-campaign-dn 15989] MASTER OT J221811.12+654219.9 superoutburst
by Taichi Kato 15 Sep '21

15 Sep '21

MASTER OT J221811.12+654219.9 superoutburst YYYYMMDD(UT) mag observer 20210908.3480 19.897zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210908.5962 <163c (Yutaka Maeda) 20210909.6506 <166c (Yutaka Maeda) 20210910.1999 15.073zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210910.2206 15.005zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210912.2642 14.551zg (Zwicky Transient Facility Lasair (Masci+ 2019))

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[vsnet-campaign-dn 15988] CRTS J212625.1+201948 superoutburst
by Taichi Kato 15 Sep '21

15 Sep '21

CRTS J212625.1+201948 superoutburst ER UMa-like object. Supercycle about 80 d. YYYYMMDD(UT) mag observer 20210908.1957 18.380zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210908.1971 18.441zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210910.1947 15.825zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210912.1973 15.875zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210914.2242 16.068zr (Zwicky Transient Facility Lasair (Masci+ 2019))

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[vsnet-campaign-dn 15987] ATLAS18sxj outburst
by Taichi Kato 15 Sep '21

15 Sep '21

ATLAS18sxj outburst Past outburst in 2018 Aug. looked like a normal outburst of an SU UMa star (from ZTF data). The current one may be a superoutburst. YYYYMMDD(UT) mag observer 20210912.1982 16.378zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210914.2209 16.522zr (Zwicky Transient Facility Lasair (Masci+ 2019))

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[vsnet-campaign-dn 15986] Re: ASASSN-21rt = ZTF21acahuzg
by Taichi Kato 15 Sep '21

15 Sep '21

Re: ASASSN-21rt = ZTF21acahuzg GALEX ID: 222658.619 +225446.50 (2000.0) GALEX_DR5_6376193502565371439 NUV=22.400(0.425) FUV=-(-)

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[vsnet-campaign-dn 15984] MASTER OT J055845.55+391533.4 superoutburst
by Taichi Kato 14 Sep '21

14 Sep '21

MASTER OT J055845.55+391533.4 superoutburst The 2021 Jan.-Feb. and 2018 Apr. superoutbursts showed a dip and a long rebrightening. YYYYMMDD(UT) mag observer 20210828.8465 <142c (Yutaka Maeda) 20210829.8457 <146c (Yutaka Maeda) 20210830.8308 <162c (Yutaka Maeda) 20210831.8157 <156c (Yutaka Maeda) 20210909.7884 146:cG (Yutaka Maeda) 20210911.1820 14.20cG (Masao Funada)

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