Central Bureau for Astronomical Telegrams

CBAT "Transient Object Followup Reports"

TCP J21101144+1740328

TCP J21101144+1740328   2023 10 28.4674*  21 10 11.44 +17 40 32.8  14.2 U             Peg       9 3

2023 10 28.4674

Discovered by Yuji Nakamura, Kameyama, Mie, Japan, on two frames (10-s exp. limiting mag 15.5) taken by 300-mm F/4.0 lens and CMOS camera. On Oct. 28.6399 UT, mag = 14.1 taken by 0.10-m F3.0 refractor and CMOS camera. Nothing is visible at this location on the frames taken on 2023 Oct. 25.4937 UT (10-s exp. limiting mag 15.5) by same instrument. --- Isao Endoh (NAOJ)

2023 10 29.4412

Photometry results were B=13.29, V=13.97, Rc=14.18 and Ic=14.64 with 0.28m SCT + QSI 632ws CCD at TAO-Kamagaya, Japan. Position end figures were 11.42 and 33.3 in R.A. and Dec., respectively.https://meineko.com/ccd/TCP_J21101144+1740328.jpg -Seiichiro Kiyora (Kamagaya, Japan)

2023 10 29.4312

F. Watanabe (Nayoro Observatory, Nayoro, Japan) performed a follow-up observation for this transient using a 0.4-m f/10 Meili telescope (Meade LX200-40ACF) + R-filtered CCD (SBIG STL-1001E) on Oct. 29.431 UT. The magnitude is measured to be R = 14.0 +/- 0.1 (reference stars from UCAC4 Rmag) and the position end figures are given as 11s.46, 33”.0.