[vsnet-alert 22271] TCP J18292290-1430460: new transient (10.3 mag) in Scutum

Sat Jun 30 20:38:12 JST 2018

TCP J18292290-1430460

R.A. 18h29m22.90s, Decl. -14°30'46.0" (J2000.0)
2018 June 29.5768 UT, 10.3 mag (unfiltered)
Discoverer: Yukio Sakurai (Mito, Japan)

2018 06 29.577 UT
Discovered by Y. Sakurai, Mito, Japan, on two frames using Nikon D7100 digital camera
+ 180-mm f/2.8 lens, who writes there is a variable star TSVSC1-TN-S300112300-126-67-2
at 21s.88 and 51".1. Nothing is visible at this location on a frame (limit mag.= 12.1)
taken on 2018 June 23.632 UT.

2018 06 30.44 UT
The Bochum Galactic Disk Survey variable star GDS_J1829246-143046 (Gaia DR2 position
end figures 24.578s, 47.30"; G= 12.85 mag) is 25" east of the position reported by
Sakurai-san. The latest ASAS-SN Sky Patrol V-band observation (Shappee et al. 2014ApJ
...788...48S and Kochanek et al. 2017PASP..129j4502K) for the transient's reported
position was obtained on 2018 Jun. 23.435 UT (fainter than 15.3 mag):
https://asas-sn.osu.edu/light_curves/8d2f31fb-79b6-4ca9-bd12-a39f3b553544
--- Patrick Schmeer (Saarbrücken-Bischmisheim, Germany)

http://www.cbat.eps.harvard.edu/unconf/followups/J18292290-1430460.html

** Spectroscopy, precise astrometry, and multiband photometry are urgently required. **

Clear skies,
Patrick