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[vsnet-campaign-dn 16414] ZTF J181732.64+101954.5: ER UMa + Z Cam + IW And
by Taichi Kato 12 May '22

12 May '22

ZTF J181732.64+101954.5: ER UMa + Z Cam + IW And From ZTF data. Supercycle about 56 d before 2020 May. Then long standstill. ER UMa state e.g. 2019 July-Sep. (normal outbursts + superoutburst). In 2019 Mar.-June, two superoutbursts occurred directly from a standstill (like NY Ser), but with the same supercycle. Superhumps with a period of 0.08881(4) d (0.13 mag) were detected during the 2019 June-July superoutburst. IW And state (dip following superoutburst) was recorded in 2018 Mar.-July.

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[vsnet-campaign-dn 16411] XM116HT = TCP J14225968+4122545: WZ Sge-type star with prominent early superhumps
by Taichi Kato 11 May '22

11 May '22

XM116HT = TCP J14225968+4122545: WZ Sge-type star with prominent early superhumps Tamas Tordai has reported observations. The object shows double-wave 0.3-mag early superhumps. The period is still somewhat uncertain (0.0557-0.0571 d). Bright WZ Sge stars with large-amplitude early superhumps are rare and observations are encouraged.

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[vsnet-campaign-dn 16413] ASASSN-22gm: superhumps (AM CVn)
by Taichi Kato 11 May '22

11 May '22

ASASSN-22gm: superhumps (AM CVn) Josch Hambsch has reported further observations. The data show 0.2-mag superhumps with a period of 0.0291(2) d. Further observations are strongly encouraged.

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[vsnet-campaign-dn 16412] ASASSN-22gr
by Taichi Kato 10 May '22

10 May '22

ASASSN-22gr ASASSN-22gr --- ------- 15:49:8.51 -62:8:20.1 2022-05-9.24 14.57 SDSS DSS VIZIER ------- CV candidate, matches to GAIA DR2 G=20.5, g>18.3 on 2022-05-01.09, g=17.3 on 2022-05-02.18, g=14.9 on 2022-05-09.23, g=15.2 on 2022-05-10.26 ASASSN-22gr 20220501.09 <183g ASN ASASSN-22gr 20220502.18 173g ASN ASASSN-22gr 20220509.23 149g ASN ASASSN-22gr 20220510.26 152g ASN

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[vsnet-campaign-dn 16410] ASASSN-22go
by Taichi Kato 09 May '22

09 May '22

ASASSN-22go ASASSN-22go --- ------- 11:55:6.56 -70:40:39.3 2022-05-7.04 14.55 SDSS DSS VIZIER ------- CV candidate, no Vizier match, g>18.3 on 2022-05-05.17, g=15.0 on 2022-05-07.00, g=15.4 on 2022-05-09.07, g=15.6 on 2022-05-09.17 ASASSN-22go 20220505.17 <183g ASN ASASSN-22go 20220507.00 150g ASN ASASSN-22go 20220509.07 154g ASN ASASSN-22go 20220509.17 156g ASN

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[vsnet-campaign-dn 16409] ASASSN-20pv: second post-superoutburst plateau (AM CVn)
by Taichi Kato 09 May '22

09 May '22

ASASSN-20pv: second post-superoutburst plateau (AM CVn) YYYYMMDD(UT) mag observer 20220415.1853 15.146g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20220415.1866 15.245g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20220415.1878 15.577g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20220416.1989 15.410g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20220416.2002 15.597g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20220416.2015 15.608g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20220416.2296 <15.511g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20220416.2309 <15.407g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20220416.2321 15.514g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20220417.2074 15.008g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20220417.2086 15.025g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20220417.2099 14.961g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20220418.2103 <15.464g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20220418.2116 <15.593g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20220418.2128 14.921g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20220422.0026 14.835g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20220422.0038 15.042g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20220422.2409 15.492g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20220422.2422 15.322g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20220422.2436 15.395g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20220422.606 143 (Rod Stubbings) 20220423.2442 15.314g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20220423.2455 15.455g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20220423.2468 15.419g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20220424.2435 15.497g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20220424.592 144 (Rod Stubbings) 20220425.376 154 (Rod Stubbings) 20220425.592 143 (Rod Stubbings) 20220425.624 144 (Rod Stubbings) 20220428.560 143 (Rod Stubbings) 20220502.610 143 (Rod Stubbings) 20220502.682 143 (Rod Stubbings) 20220503.591 143 (Rod Stubbings) 20220505.562 143 (Rod Stubbings) 20220505.635 144 (Rod Stubbings) 20220505.701 144 (Rod Stubbings) 20220509.599 144 (Rod Stubbings)

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[vsnet-campaign-dn 16408] ASASSN-22gb: stage A superhumps
by Taichi Kato 08 May '22

08 May '22

ASASSN-22gb: stage A superhumps Berto Monard and Josch Hambsch have reported further observations. The amplitudes of superhumps have been growing and the maxima were expressed by 0.05442(5) d (stage A superhumps). The long duration of stage A suggests a relatively small q.

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[vsnet-campaign-dn 16407] ASASSN-22gm: eclipsing AM CVn star
by Taichi Kato 08 May '22

08 May '22

ASASSN-22gm: eclipsing AM CVn star Berto Monard has reported observations. I obtained the following ephemeris (single night): BJD(Min) = 2459705.53602(7) + 0.02890(3) E Eclipse depth 0.26 mag. No superhumps were detected. The orbital profile is somewhat strange in that it showed two maxima in one orbital cycle. They might be (super)hump-like variations with a period of the orbital period. The object is most likely an eclipsing AM CVn star with infrequent outbursts. Further observations are needed to see whether this was a precursor or an isolated normal outburst.

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[vsnet-campaign-dn 16406] Re: PR Her
by Patrick Schmeer 08 May '22

08 May '22

PR Herculis (UGWZ) https://www.aavso.org/vsx/index.php?view=detail.top&oid=15127 PR Her was fainter than mag. 16 on 2022 May 8.38 UT according to recent ASAS-SN Sky Patrol (Shappee et al. 2014ApJ...788...48S and Kochanek et al. 2017PASP..129j4502K) data: https://asas-sn.osu.edu/sky-patrol/coordinate/6c10f9f0-10b3-4980-a70c-00627… Further observations are encouraged. Clear skies, Patrick ------- Gary Poyner wrote on Sunday, 8 May 2022 at 15:16:59 UTC: Jose Ripero has reported (on vsobs share, May 7) that the UGWZ star PR Her is in outburst. HERPR 20220507.9597 13.6 OJR Active Since its discovery in 1951 by Hoffmeister (from a photographic plate) the only major outburst to have been covered well occurred in November 2011. Since then there have been several faint detections (below mag 15) reported to the AAVSO database (the last one being in June 2020 at 16.7V by Roger Pickard). The quiescent magnitude is around 21.0. Confirmation is urgently requested. Gary ------------------------------------------------------ Gary Poyner FRAS garypoyner(a)gmail.com www.variablestars.co.uk

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[vsnet-campaign-dn 16405] V610 Her likely superoutburst
by Taichi Kato 07 May '22

07 May '22

V610 Her likely superoutburst YYYYMMDD(UT) mag observer 20220501.3925 20.099zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220501.3930 20.843zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220503.3312 17.722zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220503.3999 17.464zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220503.4162 17.336zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220503.4452 17.168zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220507.1413 164cG (Masao Funada)

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