MisV1449 rare outburst
Outburst in 2017 May and 2020 Sep. The 2017 one may have been
a superoutburst (rebrightening in ATLAS?). The 2020 one was
relatively short. Maybe a candidate for an SU UMa star
above the period gap similar to SDSSJ094002.56+274942.0.
YYYYMMDD(UT) mag observer
20230507.5783 17.109g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014))
20230507.5783 17.161g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014))
20230509.5134 <17.310g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014))
20230606.5216 14.939o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021))
20230606.5225 15.022o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021))
20230606.5239 14.928o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021))
20230606.5305 14.937o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021))
20230606.5473 14.916o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021))
SDSSJ162830.89+240259.1 superhump period
Josch Hambsch and Itoh-san have reported observations.
The superhump period is 0.0701(1) d. Amplitude 0.18 mag.
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.
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).
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).
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
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…> .
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).
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.