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

[vsnet-alert 26767] ASASSN-20pv: second post-superoutburst plateau (AM CVn)
by Taichi Kato 10 May '22

10 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-alert 26766] ASASSN-22gb: stage A superhumps
by Taichi Kato 09 May '22

09 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-alert 26765] ASASSN-22gm: eclipsing AM CVn star
by Taichi Kato 09 May '22

09 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-alert 26763] V610 Her likely superoutburst
by Taichi Kato 08 May '22

08 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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[vsnet-alert 26762] Blazar 1308+326 optical flare
by Stefan Karge 07 May '22

07 May '22

Blazar 1308+326 (OP +313, AU CVn, B2 1308+32; z=0.997) optical flare object date (UTC) mag comment -------------------------------------------------- 1308+326 20220504.178 15.16C active 1308+326 22020505.152 15.23V active -------------------------------------------------- Brightest optical state since 2002. See also ATel #15334. -------------------------------------------------- Stefan Karge (SKA) 40cm-Refl. + CCD + Clear/V-Johnson (remote) http://quasar.square7.ch/fqm/1308+326.html _______________________________________________

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[vsnet-alert 26761] asassn-22gm: an eclipsing CV with short period
by Berto Monard 07 May '22

07 May '22

ASASSN-22gm was observed at KKO on May 5-6. Time series photometry over 5h showed a fading trend with a mean magnitude of 15.2CR. Noticeable are clear eclipses hinting at a short Porb of 0.0288d. Berto Monard / CBA KKO Calitzdorp, South Africa

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[vsnet-alert 26760] NSV 4618 superoutburst
by Taichi Kato 07 May '22

07 May '22

NSV 4618 superoutburst YYYYMMDD(UT) mag observer 20220427.1620 16.578zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220427.1695 17.765zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220428.1691 16.616zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220428.1913 16.736zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220430.1933 17.887zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220430.1947 17.700zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220502.1905 13.896zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220503.538 133 (Rod Stubbings) 20220504.1881 13.842zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220504.8945 130cG (Masao Funada)

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[vsnet-alert 26758] MASTER OT J212624.16+253827.2 likely superoutburst
by Taichi Kato 07 May '22

07 May '22

MASTER OT J212624.16+253827.2 likely superoutburst YYYYMMDD(UT) mag observer 20220402.5030 18.805zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220402.5055 18.640zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220402.5080 18.666zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220402.5105 18.844zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220405.5016 18.808zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220405.5042 18.787zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220405.5067 18.811zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220405.5118 18.856zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220409.8305 <150c (Yutaka Maeda) 20220421.8256 <145c (Yutaka Maeda) 20220502.4045 14.623zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220502.4523 14.647zg (Zwicky Transient Facility Lasair (Masci+ 2019))

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[vsnet-alert 26757] MASTER OT J193347.47+442455.5 likely superoutburst
by Taichi Kato 07 May '22

07 May '22

MASTER OT J193347.47+442455.5 likely superoutburst Type from ZTF data. Not many superoutbursts in the past. YYYYMMDD(UT) mag observer 20220420.4488 20.184zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220420.4718 22.053zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220425.4488 19.068zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220425.4703 18.816zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220427.4306 15.563zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220427.4673 15.668zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220429.4558 15.757zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220429.4690 15.760zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220502.4098 15.926zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220502.4485 15.949zg (Zwicky Transient Facility Lasair (Masci+ 2019))

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[vsnet-alert 26756] MASTER OT J155215.19+831424.4 possible superoutburst
by Taichi Kato 07 May '22

07 May '22

MASTER OT J155215.19+831424.4 possible superoutburst Type from ZTF data. YYYYMMDD(UT) mag observer 20220418.6094 <158c (Yutaka Maeda) 20220419.6140 <153c (Yutaka Maeda) 20220421.4282 16.070zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220421.4685 16.109zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220424.6172 <157c (Yutaka Maeda) 20220425.2789 16.193zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220425.4116 16.222zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220427.1999 16.471zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220427.2658 16.803zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220429.3873 16.638zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220501.2588 16.692zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220501.2863 16.720zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220503.3130 16.918zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220503.3676 16.787zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220503.6015 <162c (Yutaka Maeda) 20220504.5874 <153c (Yutaka Maeda)

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