TCP J18200437-1033071 (UG|N)
https://www.aavso.org/vsx/index.php?view=detail.top&oid=687317
*** Spectroscopy and time-resolved photometry are urgently required. ***
Discovery details:
R.A. 18h20m04.37s, Decl. -10°33'07.1" (J2000.0)
2019 Apr. 8.7083 UT, 13.3 mag (CCD, unfiltered)
Discoverer: Hideo Nishimura (Shizuoka-ken, Japan)
2019 04 08.708 UT
Discovered by H. Nishimura, Shizuoka-ken, Japan, on three frames using Canon EOS 6D Digital camera + 200-mm f/3.2 lens under the limiting mag = 14.7, who writes nothing is visible at this location on two frames taken on 2019 Apr. 5.724 and 6.720 UT with the limit mag.= 14s and there is a star (mag = 15.5) on USNO-A2.0 catalog.
2019 04 08.118 UT
Recent observations by the ASAS-SN Sky Patrol (Shappee et al. 2014ApJ...788...48S and Kochanek et al. 2017PASP..129j4502K) confirm this transient: 2019 Apr. 7.076 UT, gmag. fainter than 16.33; 8.118, 13.77; 8.574, 13.45; no previous eruptions or outbursts were recorded since 2012 Apr. 22/2015 Feb. 1; complete light curve at https://asas-sn.osu.edu/light_curves/0c86c2b5-5786-44dc-ad89-c619169e24…
Galactic latitude +2.1°. Galactic nova? --- Patrick Schmeer (Saarbrücken-Bischmisheim, Germany)
http://www.cbat.eps.harvard.edu/unconf/followups/J18200437-1033071.html
Clear skies,
Patrick
2019 04 08.88 UT
Nishimura-san wrote: "There is a star (mag = 15.5) on USNO-A2.0 catalog." This star is USNO-A2.0 0750-12956864 (Bmag. 15.7, Rmag. 15.3; epoch 1951.577) with position end figures 04.28s, 07.8" (J2000.0); it is not included in other catalogues (or several magnitudes fainter and at a somewhat different position). A previous brightening of this object in 1951 July? --- Patrick Schmeer (Saarbrücken-Bischmisheim, Germany)
https://www.aavso.org/vsx/index.php?view=detail.top&oid=687317
TCP J18200437-1033071 Now Has a Sequence
Good Observing & Ad Astra,
Tim