[vsnet-alert 25839] ASASSN-21fr superoutburst (since Apr. 12): dip on May 3

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

 ASASSN-21fr (UGWZ)
https://www.aavso.org/vsx/index.php?view=detail.top&oid=2217828
 
ZTF light curve, data, and images (via Lasair):
https://lasair.roe.ac.uk/object/ZTF21aauvyod/
 
Recent ASAS-SN Sky Patrol light curve and data:
https://asas-sn.osu.edu/sky-patrol/coordinate/1e076a73-c06e-4f6a-9036-7c7304f27d1b
 
AAVSO data:
https://app.aavso.org/webobs/results/?star=ASASSN-21fr
 
The current superoutburst appears to be indeed a WZ Sge-type one.
Follow-up observations are encouraged.
 
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
Lasair:
- Smith et al., 2019RNAAS...3...26S
Zwicky Transient Facility (ZTF):
- Masci et al., 2019PASP..131a8003M
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     Am Mittwoch, 21. April 2021, 21:29:30 MESZ hat 反保雄介 <tampo at kusastro.kyoto-u.ac.jp> Folgendes geschrieben:  
 
 ASASSN-21fr: new SU UMa-type (& possible WZ Sge-type) dwarf nova

Kyoto Univ. Obs., Tonny Vanmunster, and Tamás Tordai have reported
time-resolved observations of ASASSN-21fr.
Our observations on 21st April detected ordinary superhumps with the
amplitude of ~0.2 mag and the period of ~0.055 d, confirming ASASSN-21fr as
a SU UMa-type dwarf nova.

Moreover, as ASASSN-21fr was found on 13th April but no clear moderations
were observed until today,  ASASSN-21fr is likely a low-inclination WZ
Sge-type dwarf nova.

Time-resolved observations are encouraged to establish the superhump period.

Best,
Yusuke
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京都大学大学院理学研究科宇宙物理学教室 D1
Kyoto University, Graduate School of Department of Astronomy, PhD candidate
反保 雄介 Yusuke TAMPO
MAIL: tampo at kusastro.kyoto-u.ac.jp

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