Central Bureau for Astronomical Telegrams

CBAT "Transient Object Followup Reports"

TCP J07134590-2112330

TCP J07134590-2112330   2018 03 24.4964*  07 13 45.90 -21 12 33.0  12.0 U             CMa       9 1

2018 03 24.4964

Yuji Nakamura, Kameyama, Mie, Japan, reports his discovery of this TCP (mag 12.0) in CMa on a CCD frame taken on 2018 Mar 24.4964 UT (limiting mag 15.1) using a 10cm reflector F3.0 telescope. He confirmed this object on other 3 frames taken on the same night. The object was not shown on a frame taken on 2018 Mar 17.5107 UT (limiting mag 15.4).

2018 03 24.79

USNO-B1.0 0687-0122255 (07 13 45.83 -21 12 27.3, R= 19.6 mag; G= 20.21 mag in Gaia DR1) is 5.4" away, the nearest Pan-STARRS1 source (07 13 45.84 -21 12 31.3, g= 21.55 mag) is 1.9" away from the transient's position. No previous outbursts or eruptions were recorded by the ASAS-SN Sky Patrol (Shappee et al. 2014ApJ...788...48S and Kochanek et al. 2017PASP..129j4502K) in 2012 February and since 2014 December; latest available observation: 2018 March 23.153 UT, V= 15.5 mag, contaminated by a 15 mag star 9" away): https://asas-sn.osu.edu/light_curves/b38524a4-4dff-49e8-af69-18d14ce7406a --- Patrick Schmeer (Saarbrücken-Bischmisheim, Germany)

2018 03 24.831

Visual magnitude estimate by P. Schmeer, Bischmisheim, Germany: 2018 Mar. 24.831 UT, 12.8 (203-mm Schmidt–Cassegrain telescope).

2018 03 25.4111

Photometry results were V=12.14, Rc=11.54 and Ic=11.01. Seiichiro Kiyota (Kamagaya, Japan)

2019 02 05.9327

MASTER-IAC auto-detection system (MASTER Global Robotic Net http://observ.pereplet.ru ) detected this OT on 2019-02-05 22:23:09.98UT (+ 4 180s-expositions) W=17.0m (MASTER W=0.2B+0.8R calibrated by thousands USNO -B1 field stars)