[vsnet-alert 24324] SDSS J124058.03-015919.2 (AM CVn star): 5th rebrightening (June 2)

Sat Jun 6 18:55:50 JST 2020

 SDSS J124058.03-015919.2 (UGWZ+IBWD)
https://www.aavso.org/vsx/index.php?view=detail.top&oid=132563

As expected, a fifth rebrightening occurred on 2020 June 2,
as observed by Josch Hambsch (HMB):
https://www.aavso.org/apps/webobs/results/?star=SDSS+J124058.03-015919.2

Previous rebrightenings occurred on May 8, 13, 19, and 26.
The (main) superoutburst (not a "double superoutburst") was
observed from April 27 until May 4.

Time-resolved photometry is still required.

Clear skies,
Patrick
-------
     Am Mittwoch, 27. Mai 2020, 19:55:54 MESZ hat 反保雄介 <tampo at kusastro.kyoto-u.ac.jp> Folgendes geschrieben:  

 SDSS J124058.03-015919.2: 4th rebrightening

Lasair detected its 4th rebrightening on 26th May, and also Moriyama-san
reported an observation.
However, it is already below 15.8 mag on 27th by Kyoto Univ. Obs. and
Moriyama-san.
Thus, as previous rebrightenings, this 4th rebrightening seems also a short
outburst.

As the duration between short outbursts are 6~7 days but a timescale of
outburst is about one day, continuous observations are encouraged to detect
the next outburst.

YYYYMMDD(UT)

SDSSJ124058.03-015919.2 20200525.486 17.37C Ioh (Itoh, VSOLJ)

SDSSJ124058.03-015919.2 20200526.199 14.818g Lasair
SDSSJ124058.03-015919.2 20200526.247 14.955r Lasair

SDSSJ124058.03-015919.2 20200526.650 15.5:C Myy (Moriyama, VSOLJ)

SDSSJ124058.03-015919.2 20200527.613 <16.7:C Myy (Moriyama, VSOLJ)

SDSSJ124058.03-015919.2 20200527.646 <15.8CV KyotoU

https://lasair.roe.ac.uk/object/ZTF18acyerom/