Central Bureau for Astronomical Telegrams

CBAT "Transient Object Followup Reports"

TCP J18325790-1642211

TCP J18325790-1642211   2019 04 02.7544*  18 32 57.90 -16 42 21.1  12.5 U             Sgr       8 0

2019 04 02.754

Discovered by T. Kojima, Gunma-ken, Japan, on three frames with five second exposure using Canon EOS 6D digital camera + 200-mm f/3.2 lens under the limiting mag = 14.2, who writes nothing is visible at this location on two frames taken on 2019 March 16 and April 1 UT with limit mag.= 13s.

2019 04 02.85

There is a red star 1.6" south of the transient's reported position with Gaia DR2 position end figures 57.892s, 22.67" (equinox J2000.0, epoch 2015.5; Gmag. 15.17). Other designations are USNO-A2.0 0675-26976582 (Bmag. 17.6, Rmag. 15.6), USNO-B1.0 0732-0651565, GSC2.3 SA79039038 (Vmag. 15.75, Fmag. 15.07, Bjmag. 17.80), UCAC4 367-131021, CMC15 J183257.8-164222, 2MASS J18325789-1642225, UGPS J183257.89-164222.6. According to recent ASAS-SN Sky Patrol (Shappee et al. 2014ApJ...788...48S and Kochanek et al. 2017PASP..129j4502K) observations the current brightening began around 2019 March 29; complete light curve at https://asas-sn.osu.edu/light_curves/2207db5c-b277-44d0-af82-948b0feee86c --- Patrick Schmeer (Saarbrücken-Bischmisheim, Germany)

2019 04 03.44808

Photometry results were B=15.09, V=13.62 and Ic=11.89 with 0.25-m f/3.4 astrograph + SBIG ST-10XME CCD at iTelescope.NET (Mayhill, USA). Position end figures were 58.30 and 17.7 in R.A. and Dec. http://meineko.sakura.ne.jp/ccd/TCP_J18325790-1642211.jpg Seiichiro Kiyota(Kamagya, Japan)

2019 04 03.774

Mag. B= 15.54, V= 13.88, Ic= 11.88, position end figures 58s.31, 17".6 observed by K. Yoshimoto, Yamaguchi-ken, Japan, using 0.43-m f/6.8 reflector + CCD, Siding Spring, remotely. An image at http://orange.zero.jp/k-yoshimoto/TCP_J18325790-1642211.jpg.