Central Bureau for Astronomical Telegrams

CBAT "Transient Object Followup Reports"

TCP J05074264+2447555

TCP J05074264+2447555   2017 10 31.7340*  05 07 42.64 +24 47 55.5  10.8 U             Tau       5 0

2017 10 31.734

Discovered by T. Kojima, Gunma-ken, Japan, who found this on three frames taken using Canon EOS 6D + 135-mm f3.2 lens with the limiting mag.= 13.0. Star is visible on 2017 Sept. 2.762 (mag.= 13.0) and on Oct. 25.688 (mag.= 11.7) UT. Also this star is cataloged on USNO-A2 as mag.= B14.7 and R13.6. An image at http://www.oaa.gr.jp/~oaacs/image/TCPinTau2017.jpg.

2017 10 31.88

The catalogue number for the abovementioned 14 mag USNO-A2.0 star is 1125-02093329 (Gmag= 13.72 from Gaia DR1). Further designations: GALEX J050742.7+244756, USNO-B1.0 1147-0066243, GSC2.3 N9TS000630, UCAC4 574-013830, 2MASS J05074272+2447564, WISE J050742.71+244756.4, SDSS J050742.71+244756.2. Patrick Schmeer (Saarbrücken-Bischmisheim, Germany)

2017 11 01.383

Mag. B= 12.26, V= 11.49, I= 10.49, position end figures 42s.73, 56".2 observed by K. Yoshimoto, Yamaguchi-ken, Japan, using 0.25-m f/3.4 Mayhill telescope, remotely. An image at http://orange.zero.jp/k-yoshimoto/TCP_J05074264+2447555.jpg.

2017 11 2.45596

F. Watanabe observed this object using the 0.4-m Meili telescope (+ CCD) at Nayoro Observatory on Nov. 2.456 UT. The magnitude is measured to be U=11.5 +/- 0.3 (reference stars from UCAC4 Vmag) and the position end figures are given as 42s.71, 56”.4.

2017 11 02.94681

Observation of this transient object was made on 2017 11 02.94681 by Andrea Mantero at Bernezzo Observatory (MPC C77) Cuneo, Italy, with a telescope 0.25 m. f/4 + V filter. Performed photometry returns a value of 11.684 +/- 0.005 V magnitude (reference v mags from APASS).Astrometry RA= 05 07 42.72 De= +24 47 56.2 position measured from reference stars UCAC-4 catalogue.

2017 11 03.0887

We performed some follow-up of this object remotely through a 0.5 m f/8 Ritchey Chretien + CCD FLI PL4240 from "Osservatorio Salvatore Di Giacomo" located in Agerola (ITALY). On our images taken on November 03.1, 2017 we can confirm the presence of an optical counterpart at coordinates: R.A. = 05 07 42.74, Decl.= +24 47 56.3 (equinox 2000.0; Gaia DR1 catalogue reference stars). Our multicolor photometry provides the following values (APASS catalogue): 2017, November 02.99 V= +11.75; 2017, November 03.08 V= +11.79; 2017, November 02.99 R= +11.25; 2017, November 03.08 R= +11.28; 2017, November 02.99 B= +12.66; 2017, November 03.08 B= +12.62 (accuracy +/- 0.05 magnitudes in each color) by A. Noschese, F. Coccia, E. Guido

2017 11 04.1349

More multicolor photometry of this object, obtained from 2017, November 03.95 to 2017, November 04.13 through a 0.5 m f/8 Ritchey Chretien + CCD FLI PL4240 of "Osservatorio Salvatore Di Giacomo" located in Agerola (ITALY), provides the following values (APASS catalogue): JD 2458061.44080 11.966 V; 2458061.48672 11.979 V; 2458061.52809 12.000 V; 2458061.62157 12.008 V; 2458061.45043 12.820 B; 2458061.49647 12.876 B; 2458061.52760 12.872 B; 2458061.63132 12.850 B; 2458061.45154 11.461 R; 2458061.49745 11.477 R; 2458061.52859 11.486 R; 2458061.63231 11.513 R; (accuracy +/- 0.05 magnitudes in each color) by A. Noschese, F. Coccia, L. D'Avino, E. Guido