Central Bureau for Astronomical Telegrams

CBAT "Transient Object Followup Reports"

PNV J19030433-3102187

PNV J19030433-3102187   2023 07 19.8663*  19 03 04.33 -31 02 18.7  11.4 U             Sgr       9 0

2023 07 19.8663

The transient is visible in 10 unfiltered images obtained with the NMW survey camera (f=135mm f/2.0 telephoto lens + SBIG ST-8300M CCD). The images are available at http://scan.sai.msu.ru/~kirx/img/PNVJ19030433-3102187/ From the NMW images we derive the following pre-discovery upper limit and average magnitudes: 2023-07-14.8048 UTC CV>13.7 2023-07-19.8663 UTC CV=11.41 +/-0.04 2023-07-19.9208 UTC CV=11.49 +/-0.02 A confirmation image obtained between 2023-07-19 22:19 and 22:39 UT with a ZWO ASI1600MC color CMOS camera attached to a D=80mm, f=600mm refractor shows the transient is bluer than surrounding stars. --- S. Korotkiy (Ka-Dar Observatory/Astrovert), K. Sokolovsky (UIUC/SAI MSU), Nikolay Potapov, and S. Ostapenko

2023 05 20.0392

Position end figures 4s.30, 18".2 measured with 0.20m reflector + CCD at Skygems Observatory, Namibia. J2000, Gaia DR2 positions. Position may correspond to a Gaia 20.7 G magnitude star (Gaia DR3 6760477849042929664). Approximate unfiltered R magnitude 11.0 using APASS R mag comparison stars. Andrew Pearce, Nedlands, Western Australia.

2023 07 21.2554

Photometry results were B=11.50, V=11.84, Rc=12.11 and Ic=12.26 with T72, iTelescope.NET (0.5m, F:6.8 CDK) at Deep Sky Chile at Rio Hurtado Valley, Chile. -Seiichiro Kiyota (Kamagaya, Japan)