Central Bureau for Astronomical Telegrams

CBAT "Transient Object Followup Reports"

PSN J23342383+2727196

PSN J23342383+2727196   2015 07 12.77  *  23 34 23.83 +27 27 19.6  18.8 U    4W  10N            9 9

2015 07 12.77

We discovered this object on July 12.77 2015 UT in the Tsinghua University-NAOC Transient Survey (TNTS), and the magnitude of the object on unfiltered CCD was about 18.8 mag. Discovery and reference images: http://www.thca.tsinghua.edu.cn/~wangxf/TNTS/PSNJ23342383+2727196.png

2015 07 15.411

This possible supernova in PGC 1808598 was detected with 15 x 10 min images using a clear filter Photometry: Mag 18.12 +/- 0.16 C (V for ref; USNOA2) Astrometry: RA 23 34 23.85 Dec +27 27 18.7 These data were collected remotely by Joseph Brimacombe, Coral Towers Observatory, Cairns, Australia. Link to image and further information: https://www.flickr.com/photos/43846774@N02/19555275058/

2015 08 19.83665

This transient was observed on 2015 08 19.83665 by G. Masi and P. Catalano, remotely using the 17"-f/6.8 robotic unit part of the Virtual Telescope Project facility, at Bellatrix Astronomical Observatory in Ceccano, Italy. 120-seconds exposures, unfiltered, show the source at mag. 19.5 (R mags for the reference stars from UCAC-4). The source is difficult to see, as it is faint and contaminated by the host galaxy light. We also performed astrometry, getting the following end figures: 23.81; 19.3 (J2000.0, mean residuals of 0.2" on both axes).