Central Bureau for Astronomical Telegrams

CBAT "Transient Object Followup Reports"

PSN J23135972+2453389

PSN J23135972+2453389   2013 12 12.43  *  23 13 59.72 +24 53 38.9  18.0 U   26E   4S  U12432    9 5 

2013 12 12.43

We discovered this object on Dec.12.43 2013 UT in the Tsinghua University-NAOC Transient Survey (TNTS), and the magnitude of the object on unfiltered CCD was about 18.0 mag.

2013 12 13.757

This transient was observed on 2013 12 13.757 by Gianluca Masi, Francesca Nocentini and Patrick Schmeer, remotely using the 17"-f/6.8 robotic unit part of the Virtual Telescope Project facility in Ceccano, Italy. 120-seconds exposures, unfiltered, show the source at mag. 17.5 (R mags for the reference stars from UCAC-4). We also performed astrometry, getting the following end figures: 59.76s; 38.0" (J2000.0, mean residuals of 0.2" on both axes).

2013 12 13.8561

Mag.: 17.4(V). R.A.: 23 13 59.66; Decl.: +24 53 38.8 (2000.0). Reference: PPMXL. Observer: Massimiliano Martignoni - Observatory: Stazione Astronomica Betelgeuse (B75), Magnago, Italy. Telescope: Schmidt-Cassegrain 0.25m-f/10.0 - CCD: KAF0261E

2013 12 15.83207

This object was observed by Federica Luppi and Luca Buzzi from Schiaparelli Observatory, Varese, Italy. In a stack of images totalling 5 minutes of unfiltered exposure time, the object has position end figures 59s.73, 38".4 and magnitude 17.2. Image posted at URL http://www.astrogeo.va.it/pub/TOCP/PSN_U12432.jpg