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[vsnet-campaign-dn 16389] ASASSN-22gb: new SU UMa-type dwarf nova
by Taichi Kato 04 May '22

04 May '22

ASASSN-22gb: new SU UMa-type dwarf nova Berto Monard has reported time-resolved photometry. The object started to show superhumps on Apr. 31 with a period of 0.05439(6) d (stage A superhumps). Josch Hambsch has also contributed some observations, but not long enough to illustrate superhumps.

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[vsnet-campaign-dn 16388] BC UMa (faint) superoutburst (since Apr. 30)
by Patrick Schmeer 03 May '22

03 May '22

BC Ursae Majoris (UGWZ) https://www.aavso.org/vsx/index.php?view=detail.top&oid=37185 Patrick Wiggins reported (already on 2022 April 30) that BC UMa was active in a CCD image that had been taken by him on my request (in the course of our CV monitoring programme) on April 30.430 UT. Unfortunately I checked my inbox only today. ZTF light curve, data, and images (via Lasair): https://lasair.roe.ac.uk/object/ZTF18aalprzj/ UMABC 20220430.227 13.08g ZTF UMABC 20220502.291 13.01g ZTF UMABC 20220502.346 13.02g ZTF Recent ASAS-SN Sky Patrol light curve and data: https://asas-sn.osu.edu/sky-patrol/coordinate/4b5ee7a5-b6c1-4607-9496-b4ba5… UMABC 20220428.3002 <17.41g ASN The previous (super)outburst was also first detected by Wiggins (on 2020 August 16.228 UT, see vsnet-alert 24555). Time-resolved photometry is required. Clear skies, Patrick ------- References: All-Sky Automated Survey for Supernovae (ASAS-SN) Sky Patrol: - Shappee et al., 2014ApJ...788...48S - Kochanek et al., 2017PASP..129j4502K Lasair: - Smith et al., 2019RNAAS...3...26S Zwicky Transient Facility (ZTF): - Masci et al., 2019PASP..131a8003M

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[vsnet-campaign-dn 16387] CRTS J164950.4+035835 superhump period
by Taichi Kato 03 May '22

03 May '22

CRTS J164950.4+035835 superhump period Itoh-san, Shugarov's team and Filipp Romanov have reported observations. The superhump period (during the plateau phase) has been confirmed to be 0.06922(3) d (amplitude 0.16 mag). The data in 2015 and 2016 (2017, PASJ 69, 75) were of very limited quality and the present period supersedes the older one.

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[vsnet-campaign-dn 16386] AG Hya long, bright outburst
by Taichi Kato 03 May '22

03 May '22

AG Hya long, bright outburst Rod Stubbings has advised that AG Hya is undergoing a long, bright outburst. YYYYMMDD(UT) mag observer 20220421.2178 <17.016g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20220421.2190 <16.931g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20220421.2203 <16.947g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20220422.1842 <16.749g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20220422.1855 <16.804g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20220422.1868 <16.900g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20220424.2183 16.445g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20220424.2196 <17.023g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20220424.2208 16.749g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20220425.556 160 (Rod Stubbings) 20220428.2269 14.317g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20220428.2282 14.312g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20220428.2294 14.323g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20220428.542 140 (Rod Stubbings) 20220429.1593 14.300g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20220429.1606 14.291g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20220429.1619 14.300g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20220501.1362 14.308g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20220501.1374 14.307g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20220501.1387 14.303g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20220501.1433 14.312g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20220501.1445 14.307g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20220501.1458 14.321g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20220502.1315 14.433g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20220502.1328 14.450g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20220502.1340 14.508g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20220502.607 143 (Rod Stubbings) ASAS-SN: https://asas-sn.osu.edu/sky-patrol/coordinate/c1862687-f7a4-4304-a09a-a8ad2… A few Z Cam star has known to undergo superoutbursts and the present outburst might be worth attending.

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[vsnet-campaign-dn 16385] TU Crt superoutburst
by Taichi Kato 03 May '22

03 May '22

TU Crt superoutburst YYYYMMDD(UT) mag observer 20220420.4541 <147c (Yutaka Maeda) 20220420.5710 <151C (Masayuki Moriyama) 20220424.4577 <143c (Yutaka Maeda) 20220427.6381 141:C (Masayuki Moriyama) 20220502.612 124 (Rod Stubbings)

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[vsnet-campaign-dn 16384] Re: ASASSN-19hs bright outburst
by Taichi Kato 03 May '22

03 May '22

Re: ASASSN-19hs bright outburst > (But on Apr. 19) The 2019 Mar. outburst lasted more than a month (resembling a superoutburst of an AM CVn star). The object may be still bright.

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[vsnet-campaign-dn 16383] ASASSN-19hs bright outburst
by Taichi Kato 03 May '22

03 May '22

ASASSN-19hs bright outburst (But on Apr. 19) http://gsaweb.ast.cam.ac.uk/alerts/alert/Gaia22bti/ Gaia22bti AT2022jfe 2022-04-19 19:19:07 94.96753 24.34962 15.01 18.37 1.32 unknown 2022-05-02 09:11:04 Outburst in candidate CV ASASSN-19hs

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[vsnet-campaign-dn 16382] MASTER OT J210316.39+314913.6 outburst
by Taichi Kato 03 May '22

03 May '22

MASTER OT J210316.39+314913.6 outburst No outburst in ZTF data. http://gsaweb.ast.cam.ac.uk/alerts/alert/Gaia22btj/ Gaia22btj AT2022jff 2022-04-19 15:10:56 315.81861 31.82048 14.45 18.22 0.08 unknown 2022-05-02 09:11:37 ~4 mag outburst in candidate CV MASTER OT J210316.39+314913.6

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[vsnet-campaign-dn 16381] ASASSN-22fy: new SU UMa-type dwarf nova
by Taichi Kato 30 Apr '22

30 Apr '22

ASASSN-22fy: new SU UMa-type dwarf nova Josch Hambsch has reported observations. The object showed clear superhumps on Apr. 29 (period about 0.058 d). Superhumps were not very apparent on Apr. 27.

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[vsnet-campaign-dn 16380] NSV 35 possible superoutburst
by Taichi Kato 26 Apr '22

26 Apr '22

NSV 35 possible superoutburst YYYYMMDD(UT) mag observer 20220425.476 130 (Rod Stubbings)

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