Central Bureau for Astronomical Telegrams

CBAT "Transient Object Followup Reports"

TCP J05515391+6504346

TCP J05515391+6504346   2019 04 01.4504*  05 51 53.91 +65 04 34.6  13.2 U             Cam       9 0

2019 04 1.450

Discovered by H. Nishimura, Shizuoka-ken, Japan, on three frames with 15 second exposure using Canon EOS 6D digital camera + 200-mm f/3.2 lens under the limiting mag = 14.7, who writes there is no previous image since this is not his survey area and also because of a faint star, he has confirmed the appearance of this star on April 1.593 UT.

2019 04 01.65

A (blue) progenitor candidate is 2.3" away at Gaia DR2 position end figures 53.825s, 36.80" (equinox J2000.0, epoch 2015.5; Gmag. 20.62). Other designations are USNO-B1.0 1550-0122180 (Bmag. 20.9, Rmag. 20.2), GSC2.3 NAQ5009716 (Fmag. 20.08, Bjmag. 21.52), PSO J055153.857+650436.965 (gmag. 20.59, rmag. 20.63), and CSS_J055153.8+650436. No outbursts were recorded by the ASAS-SN Sky Patrol (Shappee et al. 2014ApJ...788...48S and Kochanek et al. 2017PASP..129j4502K) between 2012 Jan. 11 and 2019 Mar. 30; complete light curve at https://asas-sn.osu.edu/light_curves/acb806ec-ce61-4bcf-8e9e-6e1a54a2e73d. The transient is probably a dwarf nova outburst with an amplitude of about 7 magnitudes (WZ Sge type?). Spectroscopy as well as multiband and time-resolved photometry are strongly recommended. --- Patrick Schmeer (Saarbrücken-Bischmisheim, Germany)

2019 04 02.1122

Photometer results were B=14.06 with 0.43-m f/4.5 CDK astrograph + FLI-PL6303E CCD at iTelescope.NET,Mayhill, New Mexico、USA. Position end figures were 53.92 and 37.47 in R.A. and Dec. http://meineko.sakura.ne.jp/ccd/TCP_J05515391+6504346.jpg Seiichiro Kiyota (Kamagaya, Japan)