[vsnet-alert 26031] ZTF21abilubd (re: ASASSN-21ma: new SU UMa-type dwarf nova)

[Patrick Schmeer pasc1312-aavso@yahoo.de via vsnet-alert]

 ZTF21abilubd = ASASSN-21ma (UGSU)
https://www.aavso.org/vsx/index.php?view=detail.top&oid=2223257
 
ZTF light curve, data, and images (via Lasair):
https://lasair.roe.ac.uk/object/ZTF21abilubd/

ASAS-SN Sky Patrol light curves and data:
https://asas-sn.osu.edu/sky-patrol/coordinate/e59c324a-d85e-4f4d-86cd-9441043da359
https://asas-sn.osu.edu/sky-patrol/coordinate/c2af9147-15ca-40f6-94a3-17cad21d9239
 
Taguchi-san wrote (vsnet-alert 26014):
"It looks a nearby star is contaminated, but two possible past outbursts
may have been recorded in 2015, 2018."
http://ooruri.kusastro.kyoto-u.ac.jp/mailarchive/vsnet-alert/26014
 
A superoutburst began on (or shortly before) 2015 October 18
and ended on (or shortly after) October 28.
Another outburst (probably a supermaximum, too) began on or before
2018 March 29 and ended after April 1.
(both according to ASAS-SN Sky Patrol and ATLAS data)

Superhumps during the current superoutburst (which started on
June 28 or 29) were first detected by Tonny Vanmunster on July 1:
http://ooruri.kusastro.kyoto-u.ac.jp/mailarchive/vsnet-alert/26025
 
Clear skies,
Patrick
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References:
All-Sky Automated Survey for Supernovae (ASAS-SN) Sky Patrol:
- Shappee et al., 2014ApJ...788...48S
- Kochanek et al., 2017PASP..129j4502K
Asteroid Terrestrial-impact Last Alert System (ATLAS):
- Tonry et al., 2018PASP..130f4505T
- Heinze et al., 2018AJ....156..241H
Lasair:
- Smith et al., 2019RNAAS...3...26S
Zwicky Transient Facility (ZTF):
- Masci et al., 2019PASP..131a8003M
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Am Donnerstag, 8. Juli 2021, 01:58:30 MESZ hat Taichi Kato Folgendes geschrieben:

ASASSN-21ma: new SU UMa-type dwarf nova

Tamas Tordai has reported observations.  The object
showed 0.2-mag superhumps with a period about 0.06 d.