Central Bureau for Astronomical Telegrams

CBAT "Transient Object Followup Reports"

PSN J12354442+1606366

PSN J12354442+1606366   2015 02 11.71  *  12 35 44.42 +16 06 36.6  18.4 U    3E   1N            9 9

2015 02 11.71

We discovered this object on February 11.71 2015 UT in the Tsinghua University-NAOC Transient Survey (TNTS), and the magnitude of the object on unfiltered CCD was about 18.4 mag. Discovery and reference images: http://www.thca.tsinghua.edu.cn/~wangxf/TNTS/PSNJ12354442+1606366.png

2015 02 11.71

The DEC posted is wrong, it should be 16:05:36.6.

2015 02 18.18366

This transient was observed on 2015 02 18.18366 by G. Masi, remotely using the 17"-f/6.8 robotic unit part of the Virtual Telescope Project facility, at Bellatrix Astronomical Observatory in Ceccano, Italy. 180-seconds exposures, unfiltered, show the source at mag. 17.1 (R mags for the reference stars from UCAC-4). We also performed astrometry, getting the following end figures: 44.25; 36.1 - Decl.:+16d 05' 36.1", note the discovered reported a wrong initial declination - (J2000.0, mean residuals of 0.2" on both axes).