June 2023 - vsnet-alert - ooruri.kusastro.kyoto-u.ac.jp

[vsnet-alert 27823] ASASSN-22ak brightened again
by Taichi Kato 07 Jun '23

07 Jun '23

ASASSN-22ak brightened again Josch Hambsch has reported new observations. The object started to brighten again on June 3. This time, superhumps have not been enhanced.

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[vsnet-alert 27822] GaiaDR32893005857946801152 = ASASSN-23dr, oscillation-type rebrightening
by Taichi Kato 07 Jun '23

07 Jun '23

GaiaDR32893005857946801152 = ASASSN-23dr, oscillation-type rebrightening Josch Hambsch and Maehara-san have reported additional observations. The object faded from superoutburst on May 30-31. After a short dip, the object now shows oscillation-type rebrightenings (like WZ Sge).

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[vsnet-alert 27821] HS Vir indeed superoutburst
by Taichi Kato 07 Jun '23

07 Jun '23

HS Vir indeed superoutburst Josch Hambsch has recorded superhumps.

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[vsnet-alert 27820] Carter_SDSSJ173047.59+554518.5 superhumps
by Taichi Kato 06 Jun '23

06 Jun '23

Carter_SDSSJ173047.59+554518.5 superhumps Itoh-san reported observations on June 5 and clear superhumps were visible. The outburst was possibly composed of early superhump-type superoutburst, dip and ordinary superoutburst (type E-like in hydrogen-rich WZ Sge stars).

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[vsnet-alert 27819] SDSSJ162830.89+240259.1: superhumps
by Taichi Kato 06 Jun '23

06 Jun '23

SDSSJ162830.89+240259.1: superhumps Itoh-san recorded superhumps on June 5. According to http://ooruri.kusastro.kyoto-u.ac.jp/mailarchive/vsnet-alert/13491 G. Masi detected superhumps in 2011. The data are not in our record. If Masi still have the data, please send them to vsnet-campaign-report(a)ooruri.kusastro.kyoto-u.ac.jp

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[vsnet-alert 27818] Re: [VSS] RCB Star IO Nor is undergoing a decline & [VSS] RCB star V653 Sco is undergoing a decline
by Peter Williams 05 Jun '23

05 Jun '23

Hi Andrew, Great to see someone keeping a regular watch on these southern RCB stars! CC to the vsnet-rcb and vsnet-alert groups for info, but I cannot remember if they accept the light curve attachments :) Tks and regards Peter Williams Heathcote NSW From: variablestarssouth(a)googlegroups.com [mailto:variablestarssouth@googlegroups.com] On Behalf Of Andrew Pearce Sent: Monday, 5 June 2023 11:15 AM To: Variable Stars South <VariableStarsSouth(a)googlegroups.com> Subject: [VSS] RCB Star IO Nor is undergoing a decline Hi All Another little observed RCB star, IO Nor, is undergoing a decline as per the attached light curve. Regards Andrew = = = = = = = = = = = = = = = = = = = = From: variablestarssouth(a)googlegroups.com [mailto:variablestarssouth@googlegroups.com] On Behalf Of Andrew Pearce Sent: Monday, 5 June 2023 10:45 AM To: Variable Stars South <VariableStarsSouth(a)googlegroups.com> Subject: [VSS] RCB star V653 Sco is undergoing a decline Hi All The little observed RCB star, V653 Sco, is undergoing a decline as can be seen from the attached light curve. Years ago, professional astronomers used to be very interested in RCB fades. That doesn't seem to be the case anymore at least that I'm aware of. Regards Andrew = = = = = = = = = = = = = = = = = = = = -- You received this message because you are subscribed to the Google Groups "Variable Stars South" group. To unsubscribe from this group and stop receiving emails from it, send an email to VariableStarsSouth+unsubscribe(a)googlegroups.com <mailto:VariableStarsSouth+unsubscribe@googlegroups.com> . To view this discussion on the web, visit https://groups.google.com/d/msgid/VariableStarsSouth/e7b14d23-70f2-4b8d-96f… <https://groups.google.com/d/msgid/VariableStarsSouth/e7b14d23-70f2-4b8d-96f…> .

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[vsnet-alert 27817] Carter_SDSSJ173047.59+554518.5 already after dip
by Taichi Kato 05 Jun '23

05 Jun '23

Carter_SDSSJ173047.59+554518.5 already after dip (AM CVn star) Tamas Tordai and Tonny Vanmunster have reported observations. The was an apparent dip on June 3 and the object was observed to brighten on June 3-4 (with superhumps).

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[vsnet-alert 27816] ZTF23aajjayv superhump period
by Taichi Kato 05 Jun '23

05 Jun '23

ZTF23aajjayv superhump period Josch Hambsch and Tonny Vanmunster have reported further observations. The object now show superhumps. An analysis of the data since May 31 yielded a period of 0.06786(6) d, amplitude 0.11 mag. Likely a period bouncer.

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[vsnet-alert 27815] ATLAS23lgk up to now
by Taichi Kato 05 Jun '23

05 Jun '23

ATLAS23lgk up to now No time-resolved photometry has been reported. YYYYMMDD(UT) mag observer 20230524.6978 14.990o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230524.7010 14.981o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230524.7088 14.992o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230524.7204 14.961o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230527.7458 15.294o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230527.7485 15.301o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230527.7734 15.268o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230531.9851 15.344o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230531.9914 15.408o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230531.9942 15.379o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230601.0115 15.382o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230602.4886 153C (Masayuki Moriyama) 20230602.7197 15.580o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230602.7230 15.530o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230602.7282 15.510o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230602.7420 15.532o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230603.9928 15.907o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021))

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[vsnet-alert 27814] ASASSN-13cs likely superoutburst
by Taichi Kato 05 Jun '23

05 Jun '23

ASASSN-13cs likely superoutburst Last superoutbursts in 2022 Apr. YYYYMMDD(UT) mag observer 20230531.3448 <17.427g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230601.3900 <17.226g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230602.1336 <16.627g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230602.3848 <16.743g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230602.6056 <151c (Yutaka Maeda) 20230603.6084 141:cG (Yutaka Maeda) 20230603.6084 141:cG (Yutaka Maeda)

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vsnet-alert June 2023