[vsnet-alert 23222] IY UMa superoutburst (since 27 April 2019)

Wed May 1 18:37:27 JST 2019

IY Ursae Majoris  (UGSU+E)
https://www.aavso.org/vsx/index.php?view=detail.top&oid=37346

Orbital period: 0.07390897 d (106.42892 min)

Indeed a superoutburst!
Recent ASAS-SN Sky Patrol (Shappee et al. 2014ApJ...788...48S
and Kochanek et al. 2017PASP..129j4502K) data and light curve:
https://asas-sn.osu.edu/light_curves/2f541145-a815-4340-8d85-a90f1d61361d

UMAIY 20190426.301 16.93g ASN
UMAIY 20190427.362 14.01g ASN
UMAIY 20190501.313 13.57g ASN

Time-resolved photometry is recommended.

Lewis Cook (COO), Douglas Barrett (BPO), and Tamas Tordai (TRT)
have already submitted results to the AAVSO:
https://www.aavso.org/apps/webobs/results/?star=IY+UMa

Clear skies,
Patrick
-----------------------------------------
Yutaka Maeda wrote (vsnet-alert 23210):

UGSU+E star IY UMa outburst!!
Probably superoutburst

UMAIY 20190427.58280 139c Mdy.VSOLJ

MAEDA Yutaka
Nagasaki Japan