[vsnet-alert 24682] Re: ASASSN-20jc: large amplitude outburst

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

 ASASSN-20jc (UGWZ:)
https://www.aavso.org/vsx/index.php?view=detail.top&oid=1545957
https://wis-tns.weizmann.ac.il/object/2020qov
 
This transient (of unknown nature) seems to be fading
again (after a plateau stage), according to recent
ASAS-SN Sky Patrol (Shappee et al. 2014ApJ...788...48S
and Kochanek et al. 2017PASP..129j4502K) data:
https://asas-sn.osu.edu/light_curves/c0591052-63ca-41b1-877c-ae1e8a3cbb6d
 
AAVSO data (only reported by Josch Hambsch, HMB):
https://www.aavso.org/apps/webobs/results/?star=ASASSN-20jc
 
WZ Sagittae-type dwarf nova outburst? Time-resolved
photometry and spectroscopy are still encouraged.
 
Clear skies,
Patrick
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     Am Samstag, 22. August 2020, 10:49:40 MESZ hat Patrick Schmeer pasc1312-aavso at yahoo.de via vsnet-alert <vsnet-alert at ooruri.kusastro.kyoto-u.ac.jp> Folgendes geschrieben:  
 
  ASASSN-20jc (UG/N)
https://www.aavso.org/vsx/index.php?view=detail.top&oid=1545957

Recent 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/5e2c8dc3-2742-4f46-8360-6be0a320c184

AAVSO data (all by Josch Hambsch, HMB):
https://www.aavso.org/apps/webobs/results/?star=ASASSN-20jc
 
Spectroscopy and further time-resolved photometry are encouraged.

Clear skies,
Patrick
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    Am Sonntag, 26. Juli 2020, 10:27:02 MESZ hat Berto Monard astroberto13m at gmail.com via vsnet-alert <vsnet-alert at ooruri.kusastro.kyoto-u.ac.jp> Folgendes geschrieben:  
 
 Unfiltered CCD observations at CBA KKO over a duration of 0.2d show
ASASSN-20jc OT around magn 13.0CR, more than 2 mag brighter than the
discovery magnitude. The outburst magnitude therefore  >7mag.
Possibly a nova or alternatively another ugwz type CV.

The observations show a gradual fade with a non-cyclic modulation.
Astrometry vs UCAC2 gave a position (2000): 15 08 10.13  -09 13 04.6 with
uncertainties 0.02 and 0.1 for RA and Decl respectively.

Berto Monard / CBA KKO
Calitzdorp, South Africa