[vsnet-alert 25990] V744 And (AM CVn star) likely superoutburst (since June 17)

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

 V744 Andromedae (UGSU/IBWD, AM CVn star)
https://www.aavso.org/vsx/index.php?view=detail.top&oid=132057
 
The current outburst has also been recorded the ASAS-SN Sky Patrol.
Complete light curve and data:
https://asas-sn.osu.edu/sky-patrol/coordinate/e9d59e25-7c6c-49dc-9143-46360e3bf175
ANDV744 20210614.4324 <17.04g ASN
ANDV744 20210617.4343 14.10g ASN
ANDV744 20210617.4355 14.05g ASN
ANDV744 20210617.4367 14.07g ASN
ANDV744 20210619.6207 14.44g ASN

Gaia observations (see also Denis Denisenko's message below):
http://gsaweb.ast.cam.ac.uk/alerts/alert/Gaia21cxj/
ANDV744 20210617.6325 14.30G Gaia
ANDV744 20210617.8086 14.37G Gaia
 
Additional ATLAS observations (o = orange):
ANDV744 20210619.5846 14.839o ATLAS
ANDV744 20210619.5887 14.849o ATLAS
ANDV744 20210619.6059 14.835o ATLAS
ANDV744 20210619.6172 14.847o ATLAS
 
Previous outbursts were recorded 2009 Nov. - Dec. (superoutburst) and 2015 Jan. - Feb.
 
Time-resolved photometry during the current outburst is 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
Asteroid Terrestrial-impact Last Alert System (ATLAS):
- Tonry et al., 2018PASP..130f4505T
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Am Samstag, 19. Juni 2021, 19:40:23 MESZ hat Denis Denisenko Folgendes geschrieben:

This AM CVn-type dwarf nova (P=0.02608 d) is in outburst according to Gaia
Alerts, see http://gsaweb.ast.cam.ac.uk/alerts/alert/Gaia21cxj/

Gaia21cxj = AT2021qja = V744 And
  20210603.5970  <189o  ATLAS (Tonry et al., 2018)
  20210613.5975  <197c  ATLAS
  20210617.6325  14.3G  Gaia  Outburst!

AAVSO VSX entry:
https://www.aavso.org/vsx/index.php?view=detail.top&oid=132057
Position: 01 29 40.06 +38 42 10.4
Type: UGSU/IBWD
VSX range: 14.5-20.5 CR

Currently a morning object (opposition with the Sun on October 17th).

Denis Denisenko