Central Bureau for Astronomical Telegrams
CBAT "Transient Object Followup Reports"
TCP J22452564-5246510
TCP J22452564-5246510 2020 09 05.1507* 22 45 25.64 -52 46 51.0 14.5 U Gru 9 1
2020 09 05.1507
Discovered by C. Jacques, C. Colesanti, C. Barreto, E. Pimentel, I. Mussi, J. Ribeiro, M. Domingues, J. Amancio, L. Amaral, P. Holvorcem, T. Napoleao on behalf of the Brazilian Transient Search - BraTS - at SONEAR Observatory, Oliveira, Brazil in three frames with 10 seconds exposure using an astrograph 280mm f/2.2 + CCD unfiltered, with magnitude 14.5 under limiting mag = 17.0. Nothing is visible at this location on the previous frames (limiting mag = 17.1) taken on 2020 Sep 03.1603 UT.
2020 09 06.59
A progenitor candidate is Gaia DR2 6507335805215054464 with position end figures 25.591 s in RA and 50.32" in DE (equinox J2000.0, epoch J2015.5; Gmag. 19.15, BPmag. 19.3, RPmag. 18.5; parallax 2.34 ± 0.33 mas, distance 0.43 ± 0.08 kpc), which is 0.8" NNW of the reported position of the transient. Other designations are DES J224525.57-524650.2 (gmag. 19.4, rmag. 19.3; RR Lyrae variable candidate according to Abbott et al., 2019AJ....158...16S), USNO-A2.0 0300-37751591 (Bmag. 18.5, Rmag. 19.1), USNO-B1.0 0372-1124511, GSC2.3 SAN4005505 (Fmag. 19.4, Bjmag. 19.3), WISE J224525.53-524650.2, 3XMM J224525.5-524649, GALEX J224525.5-524650 (FUVmag. 20.7, NUVmag. 19.8) —— Patrick Schmeer (Saarbrücken-Bischmisheim, Germany)
2020 09 06.6
No brightenings were observed by the ASAS-SN Sky Patrol (Shappee et al. 2014ApJ...788...48S and Kochanek et al. 2017PASP..129j4502K) since 2014 April 30; the latest observation is 2020 Aug. 24.798 UT, fainter than gmag. 16.8; complete light curve and data: https://asas-sn.osu.edu/light_curves/6a1a5717-fd39-4360-bd34-298e62784115 —— Patrick Schmeer (Saarbrücken-Bischmisheim, Germany)
2020 09 06.5208
Mag. 14.16(B), 14.48(V), 14.30 (R) and J2000.0 position end figures 25.62s, 50.4" on a 60-s exposure taken with the 0.50-m f/6.8 reflector + CCD at iTelescope.NET, SSO, Australia. observers E. Pimentel, C. Jacques, L. Amaral, C. Colesanti, I. Mussi, J. Ribeiro, M. Domingues, J. Amancio, P. Holvorcem, T. Napoleao, C.H.Barreto on behalf of the Brazilian Transient Search (BraTS).
