Central Bureau for Astronomical Telegrams

CBAT "Transient Object Followup Reports"

TCP J18010186-2951258

TCP J18010186-2951258   2018 07 13.4938*  18 01 01.86 -29 51 25.8  10.8 U             Sgr       8 0

2018 07 13.494

Discovered by T. Kojima, Gunma-ken, Japan, who found this on six frames (limiting mag.= 13.3) taken by Canon EOS 6D + 200-mm f/3.2 lens. Nothing is visible at this location on a frame taken on 2017 July 2.522. There is a star (mag.= 15.0) at 01s.98 and 23".7 on USNO-A2.

2018 07 13.63

Crowded field. The current brightening was first detected by the ASAS-SN Sky Patrol (Shappee et al. 2014ApJ...788...48S and Kochanek et al. 2017PASP..129j4502K) on 2018 July 4.169 UT at Vmag. 13.9; the latest available observation is July 12.148 UT, Vmag. 12.0. Light curve at https://asas-sn.osu.edu/light_curves/2cffca21-6b86-4488-be2a-b473ab1d0256 --- Patrick Schmeer (Saarbrücken-Bischmisheim, Germany)

2018 07 13.66

No previous (major) brightenings were recorded by the ASAS-SN Sky Patrol since 2016 March 10: https://asas-sn.osu.edu/light_curves/7952b199-5c3b-4457-a470-6d9379f9e85f --- Patrick Schmeer (Saarbrücken-Bischmisheim, Germany)

2018 07 13.596

http://k-itagaki.jp/images/TCP-sgr.jpg

2018 07 14.3589

Photometry results were B=12.34, V=10.75, Rc=9.89 and Ic=8.96 with 0.50-m f/4.5 CDK astrograph + FLI PL6303E CCD camera (T30, iTelescope.NET at SSO, Australia). Position end figures were 01.81 and 24.6 n R.A. and Dec. Seiichiro Kiyota (kamagaya, Japan)

2018 07 14.528

Mag. B= 12.40, V= 10.69, Rc= 9.67, Ic= 8.84, position end figures 01s.81, 24".8 observed by K. Yoshimoto, Yamaguchi-ken, Japan, with 0.20-m Ritchey-Chretien + CCD + f/5.4 focal reducer. An image at http://orange.zero.jp/k-yoshimoto/TCP-J18010186-2951258.jpg.