[vsnet-alert 22649] TCP J17541747-2942531: new transient (14.9 mag) in Sagittarius

Wed Oct 24 17:14:25 JST 2018

TCP J17541747-2942531 (= AT 2018hnj)

Discovery details:
R.A. 17h54m17.47s, Decl. -29°42'53.1" (J2000.0)
2018 October 23.9179 UT, 14.9 mag (CCD, unfiltered)
Discoverers: Cristóvão Jacques, João Ribeiro de Barros, Eduardo Pimentel,
 Paulo Renato Holvorcem (SONEAR Observatory, Oliveira, Brazil)

2018 10 23.91791 UT
Discovered by C. Jacques, J. Barros, E. Pimentel, P. Holvorcem, on behalf
of the Brazilian Transient Search – BraTS – at SONEAR Observatory,
Oliveira, Brazil with three frames with 10 seconds exposure using an
astrograph 11"f/2.2 + CCD camera under limiting mag = 16.5. Nothing
is visible at this location on the previous frame (limit mag = 16.0)
taken on 2018 October 21.914 UT.

2018 10 24.29 UT
Also reported as AT 2018hnj by the discoverers:
https://wis-tns.weizmann.ac.il/object/2018hnj
An OGLE II. VI photometry of Galactic Bulge (Udalski+, 2002) catalogue
source (position end figures 17.47s, 53.3"; V= 20.8, I= 19.0 mag) is
0.2" south of the transient's reported position.
Nothing was detected by the ASAS-SN Sky Patrol (Shappee et al.
2014ApJ...788...48S and Kochanek et al. 2017PASP..129j4502K) since
2013 Apr. 4; latest available observation is 2018 Oct. 7.0607 UT,
gmag. fainter than 15.1; complete 'light curve' at
https://asas-sn.osu.edu/light_curves/fe4b7850-e9d3-4412-adb1-94623c7f8b84
--- Patrick Schmeer (Saarbrücken-Bischmisheim, Germany)

http://www.cbat.eps.harvard.edu/unconf/followups/J17541747-2942531.html

Spectroscopy and multiband photometry are urgently required.

Clear skies,
Patrick