Central Bureau for Astronomical Telegrams

CBAT "Transient Object Followup Reports"

PNV J17370958-3510211

PNV J17370958-3510211   2019 09 15.4247*  17 37 09.58 -35 10 21.1  11.0 U             Sco       I 0

2019 09 14.1370

The brightening is confirmed by the following ASAS-SN Sky Patrol (Shappee et al. 2014ApJ...788...48S and Kochanek et al. 2017PASP..129j4502K) observations (g-band magnitudes): 2019 Sept. 12.145 UT, [15.8; 13.138, [14.6; 14.137, 13.4; 14.884, 13.1; light curve at https://asas-sn.osu.edu/light_curves/d5695d80-a6ae-40ce-aad0-6a57126f8c0c --- Patrick Schmeer (Saarbrücken-Bischmisheim, Germany)

2019 09 15.440

http://k-itagaki.jp/PN-Sco.jpg

2019 09 15.48

The two Gaia sources that are closest to Itagaki-san's improved position (17 37 09.53 -35 10 23.4) are both 5" away (G magnitudes 20.5 and 20.6). The Vista variable VVV J173709.36-351023.01 is 2.1" to the west of the transient's position. No previous eruptions (or outbursts) were recorded by the ASAS-SN Sky Patrol since 2012 March 31 / 2016 March 9: https://asas-sn.osu.edu/light_curves/b1ea1cd7-ba06-474d-bc86-abe7d33b8561 --- Patrick Schmeer (Saarbrücken-Bischmisheim, Germany)

2019 09 15.412

Three independent discoveries have been reported: Tadashi Kojima, Gunma-ken, from three images using Canon EOS 6D + 200-mm f/3.2, 2019 Sept. 15.412 UT, Mag. 11.5, positions end of figure 09s.45 and 21".4. Koichi Itagaki, Yamagata, using 180-mm lens + CCD at his Okayama station, no recent image. Hideo Nishimura, Shizuoka-ken, from three images using Canon EOS 6D + 200-mm lens f/3.2, 2019 Sept. 15.442 UT, Mag 10.9, positions end of figure 09s.56 and 25".3. Also K. Yoshimoto, Yamaguchi, observed this PNV, 2019 Sept. 15.451 UT, Mag B= 14.07, V= 11.75, Ic= 8.91, positions end of figure 09s.53 and 23".3 using 0.50-m f/6.8 reflector + CCD + f/4.5 focal reducer at Siding Spring remotely. Image at http://orange.zero.jp/k-yoshimoto/PNV_J17370958-3510211.jpg.

2019 09 15.4237

Minoru Yamamoto, Okazaki, Aichi, Japan, reported his independent discovery of this possible nova to NAOJ on 2019 Sept 15.488 UT. He discovered it on a frame taken on 2019 Sept 15.4237 UT using a 180mm F3.5 lens. He reported the position RA 17 37 09.58, Dec -35 10 24.1 (2000.0) and magnitude 10.5.

2019 09 15.4203

Yuji Nakamura, Kameyama, Mie, Japan, reported his independent discovery of this possible nova to NAOJ on 2019 Sept 15.582 UT. He discovered it on an unfiltered CCD frame taken on 2019 Sept 15.4203 UT using a 135mm F4 lens. He reported the position RA 17 37 09.5, Dec -35 10 25 (2000.0) and magnitude 10.9. He notes that this object was not shown on a frame taken on 2019 Sept 09.4251 UT (limiting magnitude 13).

2019 09 14.04265

C. Jacques, L. Amaral, C. Colesanti, E. Pimentel, I. Mussi, J. Ribeiro, M. Domingues, P. Holvorcem, T. Napoleao on behalf of the Brazilian Transient Search - BraTS - at SONEAR Observatory, Oliveira, Brazil report pre-discovery observations. 30 seconds exposure using an telephoto 200m f/1.8 + Canon 6D. 2019 09 14.04265 17 37 09.63 -35 10 20.0 mag 12.2 2019 09 15.01775 17 37 09.67 -35 10 20.0 mag 11.0

2019 09 21.3998

F. Watanabe (Nayoro Observatory, Nayoro, Japan) performed a follow-up observation for this transient using a 0.4-m f/10 Meili telescope (Meade Schmidt-Cassegrain telescope) + R-filtered CCD (SBIG STL-1001E) on Sep. 21.3998 UT. The magnitude is measured to be R = 11.7 +/- 0.1 (reference stars from UCAC4 Rmag). The position end figures are given as 09s.55, 23".3.