[vsnet-alert 24745] Re: SDSS J152212.20+080340.9 bright outburst

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

 SDSS J152212.20+080340.9 (UGSU:)
https://www.aavso.org/vsx/index.php?view=detail.top&oid=185647
 
Complete ASAS-SN Sky Patrol (Shappee et al. 2014ApJ...788...48S
and Kochanek et al. 2017PASP..129j4502K) light curve and data:
https://asas-sn.osu.edu/light_curves/89986ae5-bf28-4567-8a1c-21841389fdef
 
Zwicky Transient Facility (ZTF) light curve:
https://lasair.roe.ac.uk/object/ZTF19aavnzxp/
 
This is likely an SU UMa-type dwarf nova, undergoing long and very
short outbursts. Recent examples (from ASAS-SN, ZTF, and Gaia data):
1) 2016 May 23 - June 3
2) 2017 July 30 - August 11
3) 2019 May 29-31
4) 2019 August 13
5) 2020 September 29
#1 and #2 look like superoutbursts, #3 and #4 like normal outbursts.

For the "UGSU:" classification of SDSS J152212.20+080340.9 see also
https://ui.adsabs.harvard.edu/abs/2012PASJ...64...63K/abstract
 
Time-resolved photometry is encouraged.
 
Clear skies,
Patrick
-------
     Am Donnerstag, 1. Oktober 2020, 05:00:11 MESZ hat Taichi Kato <tkato at kusastro.kyoto-u.ac.jp> Folgendes geschrieben:  
 
 SDSS J152212.20+080340.9 bright outburst

http://gsaweb.ast.cam.ac.uk/alerts/alert/Gaia20eoa/

Gaia20eoa    AT2020uob    2020-09-29 21:18:50    230.55076    8.06140    14.78    18.05    1.70    CV    2020-09-30 22:23:11    known CV SDSS J152212.20+080340.9, previous outbursts visible in Gaia light curve

Possibly related data:

  YYYYMMDD(UT)  mag  observer
  20200804.4962 <147c  (Yutaka Maeda)
  20200805.4929 <157c  (Yutaka Maeda)
  20200813.5255 <160c  (Yutaka Maeda)
  20200815.4961 163:c (Yutaka Maeda)