Discovery of Unknown Transient (Possible CV) ROTSE3 J160213.1-021311.7
ATel #824; E. S. Rykoff (UMich), J. Aretakis (UMich), T. Guver (U. Istanbul) report on behalf of the ROTSE collaboration:
on 2 Jun 2006; 22:06 UT
Distributed as an Instant Email Notice Request For Observations
Credential Certification: Eli Rykoff (erykoff@umich.edu)
Subjects: Optical, Request for Observations, Cataclysmic Variable, Transient
Analysis of ROTSE-III sky patrol fields reveals an unknown transient we
designate ROTSE3 J160213.1-021311.7. The object was first detected May 28.94,
2006 by the ROTSE-IIIc telescope at the H.E.S.S. site in Namibia, at an
unfiltered magnitude of 18.2+/-0.2. It was not detected on May 27.94 with a
limiting magnitude of 18.5, and has not outburst previously in the ROTSE-III transient search. The transient brightened to 16.8+/-0.1 on May
29.92, and has faded to around 18th magnitude where it has remained for two
days. On June 2.87 it was at 17.9+/-0.1 magnitude. No counterpart is observed
in the Digitized Sky Survey, the USNO scanned plates, or the 2MASS survey.
This implies that the counterpart is very faint. Furthermore, there hWe obtained 3 band photometry
of the transient from the 1.5m Russian-Turkish Telescope (RTT150) on June
1.88, where m_B = 18.96+/-0.015, m_V = 18.31+/-0.021, and m_Rc = 17.69+/-0.017.
The V-R color of 0.6 is not as blue as expected for a CV outburst, making
identification of this source uncertain. Spectroscopic and photometric observations are
encouraged while the transient is still bright.
A finding chart can be found at: http://www.rotse.net/transients/j1602/j1602.jpg
