[vsnet-newvar 2603] OT_J080714.2+113812: new dwarf nova in Cnc

[Taichi Kato]

   Forwarded.  The object was not recorded in outburst in available
ASAS-3 data.  This mught indicate that outbursts are relatively rare.
Time-resolved photometry is strongly encouraged.

===

  Itagaki-san detected a possible new variable in Cnc.  It is located
at 8:07:14.25, +11:38:12.7 (J2000.0), which was mag 13.6 (unfiltered
CCD) on Nov. 13.71 UT.  His survey image taken on Oct. 2.796 UT does
not show any object brighter than mag about 17.  K. Kadota, Ageo,
Saitama, Japan, confirmed the existence of the object (unfiltered mag
13.7 on Nov. 15.67 UT).  Itagaki supplys additional photometries;
Nov. 16.688 UT, 13.8; 19.619, 14.1.

Following our request, H. Naito, Nishi-Harima Astronomical
Observatory, took a low-resolution (410 - 670 nm, R = 330 at H_alpha)
spectrum of this object on Nov. 16.77 UT with the 2.0-m NAYUTA
telescope.  It shows a smooth blue continuum with Balmer lines in
absorption.  Core of the H_alpha absoption is filled by the emission
component.  It suggests that it is a dwarf nova in outburst.

Cheers,
Hitoshi

===

OT_J080714.2+113812 20071113.71 136C KIt
OT_J080714.2+113812 20071115.67 137C Kdt
OT_J080714.2+113812 20071116.688 138C KIt
OT_J080714.2+113812 20071119.619 141C KIt