[vsnet-alert 16793] MASTER OT J003059.39+301634.3 - likely an eclipsing dwarf nova

Denis Denisenko d.v.denisenko at gmail.com
Sat Jan 18 23:19:54 JST 2014


Sergey Shurpakov has found new CV in Andromeda among MASTER-Tunka
transients, MASTER OT J003059.39+301634.3 (16.1-20:m). It was
published in Astronomer's Telegram ATel #5774,
http://www.astronomerstelegram.org/?read=5774

MASTER OT J003059.39+301634.3
  20140117.474   161C   MASTER-Tunka
  20140117.505   166C   MASTER-Tunka

Other IDs:
GALEX J003059.3+301635 (NUV=20.90+/-0.25)
USNO-A2.0 1200-00232738 (00 30 59.46 +30 16 34.9 R=18.2 B=18.7)
USNO-B1.0 1202-0006789 (00 30 59.439 +30 16 34.72 B1=18.96 R1=18.47
B2=19.97 R2=19.21)
SDSS J003059.40+301634.4 (u=18.27 g=18.07 r=18.03 i=18.03 z=18.03)
http://skyserver.sdss3.org/dr8/en/tools/explore/obj.asp?id=1237680483028566024

The object is showing large variability on the short time scales in
both MASTER and Catalina Sky Survey data. Note the fading by 0.5m in
45 minutes between the two triplets of MASTER-Tunka images on Jan. 17.
The similar variability is present in the archival CSS light curve:

http://nesssi.cacr.caltech.edu/cgi-bin/getcssconedb_id.cgi?ID=1129003052556&OUT=csv&SHORT=short&PLOT=plot

MASTER OT J003059.39+301634.3 is probably an eclipsing dwarf nova.
Photomertic time series are strongly encouraged. SDSS colors are
telling in favor of a short orbital period.

Denis Denisenko
Member of MASTER team at SAI MSU


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