July 2022 - vsnet-alert - ooruri.kusastro.kyoto-u.ac.jp

[vsnet-alert 26866] Re: TCP J22561804+4109534: new WZ Sge-type dwarf nova
by Taichi Kato 05 Jul '22

05 Jul '22

> The superhump profile shows no signs of a double-waved pattern, and I could > not detect early superhumps in my data. Yet, the large outburst amplitude of > ~7.4 mag, and the long time for superhumps to develop (approx. 9 days) make > this a very likely WZ Sge-type dwarf nova. It would be worth noting that the period 0.065 d is long for a WZ Sge star. If this is indeed a WZ Sge star, it must be a period bouncer. Period bouncers tend to have smaller amplitudes of ordinary superhumps and 0.14 mag seems to be a bit large. I would propose to assign the WZ Sge classification after confirmation of a small Pdot and/or rebrightenings.

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[vsnet-alert 26864] ASASSN-20pv (AM CVn) switching on and off
by Taichi Kato 05 Jul '22

05 Jul '22

ASASSN-20pv (AM CVn) switching on and off Still shows post-superoutburst activity. YYYYMMDD(UT) mag observer 20220621.426 143 (Rod Stubbings) 20220621.458 145 (Rod Stubbings) 20220627.469 154 (Rod Stubbings) 20220628.428 154 (Rod Stubbings) 20220630.399 156 (Rod Stubbings) 20220630.492 154 (Rod Stubbings) 20220702.503 154 (Rod Stubbings) 20220703.449 148 (Rod Stubbings) 20220703.499 145 (Rod Stubbings)

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[vsnet-alert 26863] Re: ASASSN-14gq likely superoutburst
by Taichi Kato 05 Jul '22

05 Jul '22

Re: ASASSN-14gq likely superoutburst Faded rapidly. YYYYMMDD(UT) mag observer 20220702.491 143 (Rod Stubbings) 20220703.471 155 (Rod Stubbings)

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[vsnet-alert 26862] ASASSN-14gq likely superoutburst
by Taichi Kato 04 Jul '22

04 Jul '22

ASASSN-14gq likely superoutburst YYYYMMDD(UT) mag observer 20220702.491 143 (Rod Stubbings)

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[vsnet-alert 26861] CRTS J202857.1-061803 likely superoutburst
by Taichi Kato 04 Jul '22

04 Jul '22

CRTS J202857.1-061803 likely superoutburst Type from ZTF data. YYYYMMDD(UT) mag observer 20220615.4097 <164C (Masao Funada) 20220626.1150 151cG (Masao Funada) 20220629.7143 152:cG (Yutaka Maeda) 20220630.7076 153:cG (Yutaka Maeda) 20220701.2036 158cG (Masao Funada)

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[vsnet-alert 26860] ASASSN-18su superhump period
by Taichi Kato 04 Jul '22

04 Jul '22

ASASSN-18su superhump period Berto Monard, Josch Hambsch and Itoh-san have reported observations. The superhump period is 0.05815(2) d. The amplitude is large (0.23 mag). Ordinary SU UMa star.

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[vsnet-alert 26859] Blazar 1308+326 optical superoutburst
by Stefan Karge 03 Jul '22

03 Jul '22

Blazar 1308+326 (OP +313, AU CVn, B2 1308+32; z=0.997) optical superoutburst object date (UTC) mag comment -------------------------------------------------- 1308+326 20220630.001 13.03C active (1) 1308+326 20220701.913 12.88C active (1) 1308+326 20220701.944 12.95V active (2) 1308+326 20220702.728 13.18V active (3) 1308+326 20220702.767 12.98V active (4) -------------------------------------------------- Brightest optical state ever. Second optical flare in just two month [vsnet-alert 26762]. See also ATel #15476 and ATel #15474. -------------------------------------------------- (1) 30cm-Refl. + CCD + Clear (2) 43cm-Refl. + CCD + V-Johnson (remote) (3) 50cm-Refl. + CCD + V-Johnson (remote) (4) 36cm-Refl. + CCD + V-Johnson (remote) Stefan Karge (SKA) http://quasar.square7.ch/fqm/1308+326.html _______________________________________________

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[vsnet-alert 26858] ASASSN-18su observed at KKO
by Berto Monard 02 Jul '22

02 Jul '22

Hello, two nights of observations at CBA KKO show ASASSN-18su to be in an active stage of outburst Clear superhumps with amplitude of 0.27CR and period of 0.0582d +/- 0.0001d hint at an UGSU type CV . The unfiltered magnitude of the object was around 12.0CR on both nights, 29 and 30 June 2022. There has been a four year interval since the previous outburst. Berto Monard / KKO

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