Central Bureau for Astronomical Telegrams

CBAT "Transient Object Followup Reports"

TCP J20100517+1303006

TCP J20100517+1303006   2017 06 19.7028*  20 10 05.17 +13 03 00.6  12.6 U             Aql       5 3

2017 06 19.703

Discovered by T. Kojima, Gunma-ken, Japan, using Canon EOS 6D digital camera + 200-mm f/3.2 lens mounted on Sky-Memo equatorial instrument, who writes mag.= 13.0 on 2017 June 16.675 UT. Nothing is visible at this location on 2017 May. 4.716 and June 4.709 UT under the liming mag.= 13.5. Note position measured by K. Yoshimoto from his image.

2017 06 22.75

The following star is less than 1.2" from the reported position of this transient: GALEX J201005.0+130300 (NUV= 16.97 mag) = USNO-B1.0 1030-0638093 (R1= 15.86, B2= 16.82, R2= 16.16, I= 16.62 mag) = GSC2.3 N1UX000016 (F= 15.37, j= 16.96, V= 14.73, N= 15.79 mag) = 2MASS J20100514+1303006 (J= 15.936, H= 15.530, K= 15.230 mag) = WISE J201005.15+130300.9 (W1= 14.224, W2= 14.155, W3= 12.576 mag). The Gaia DR1 position (RA, DEC at epoch 2015.0, equinox J2000.0) of this star (G= 17.969 mag) is 20h10m05.169s, +13°03'00.50". Dwarf nova outburst? --- Patrick Schmeer (Saarbrücken-Bischmisheim, Germany)

2017 6 23.0717

Photometry results were B=14.03, V=14.21, Rc=14.30 and Ic=14.34 with 0.43-m f/6.8 CDK astrograph + SBIG STL-11000M CCD camera (T-07, ITelescope.NET) at Nerpio, Spain remotely. It has blue color and might be dwarf novae. Seiichiro Kiyota (Kamagaya, Japan)

2017 06 23.557

Mag.= 14.5, position end figures 05s.16, 00".8 observed by T. Noguchi, Chiba-ken, Japan, using 0.23-m f/6.3 Schmidt Cassegrain + unfiltered CCD, who put an image at http://park8.wakwak.com/~ngc/images/TCPinAql.jpg.