Central Bureau for Astronomical Telegrams

CBAT "Transient Object Followup Reports"

PNV J17422408-2053088

PNV J17422408-2053088   2018 08 08.9596*  17 42 24.08 -20 53 08.8  11.1 U             Oph       9 0

2018 08 9.112

Discovered by C. Jacques, J. Barros, E. Pimentel, P. Holvorcem, on behalf of the Brazilian Transient Search - BraTS - at SONEAR Observatary, 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 2018 July. 8.991 UT.

2018 08 09.24

The Pan-STARRS1 source PSO J174224.016-205308.866 (position end figures 24.013s, 08.90"; i= 20.17 mag) is 0.9" away from the reported position of the transient. Latest available ASAS-SN Sky Patrol observation (Shappee et al. 2014ApJ...788...48S and Kochanek et al. 2017PASP..129j4502K): 2018 Aug. 8.273 UT, fainter than Vmag. 16.0. V-band data at https://asas-sn.osu.edu/light_curves/848b65b5-ede3-4571-91eb-4ed7a9f4cce2. --- Patrick Schmeer (Saarbrücken-Bischmisheim, Germany)

2018 08 09.3876

PNV J17422408-2053088 is 10.961V on 09.3876 August 2018 with a 60s CCD images taken remotely by Robert Fidrich, Budapest, Hungary with a 0.43m iTelescope.net reflector at Siding Spring, Australia.

2018 08 09.3589

Photometry results were B=11.29, V=10.69, Rc=10.26 and Ic=10.07 with 0.50-m f/4.5 CDK astrograph + FLI PL6303E CCD (T30, iTelescope.NET at Siding Spring Observatory, NSW, Australia. Position end figures were 24.10 and 08.6 in R.A. and Dec. My image is available at http://meineko.sakura.ne.jp/ccd/PNV_J17422408-2053088.jpg Seiichiro Kiyota (Kamagaya, Japan)

2018 08 09.3882

Correction: PNV J17422408-2053088 was 10.50V (-+0.025) on 09.3882 August 2018 with a 2x60s CCD images taken remotely by Robert Fidrich, Budapest, Hungary with a 0.43m iTelescope.net reflector at Siding Spring, Australia.

2018 08 09.42

PSO J174224.016-205308.866 and the Vista variable VVV J174224.02-205307.77 are both 1" away from the reported co-ordinates of the transient. The amplitude of this eruption is at least 11 magnitudes. No outbursts or eruptions were detected by the ASAS-SN Sky Patrol since 2015 Feb. 16: https://asas-sn.osu.edu/light_curves/313de2c3-624a-4be5-87be-b626265a0314 --- Patrick Schmeer (Saarbrücken-Bischmisheim, Germany)