Central Bureau for Astronomical Telegrams

CBAT "Transient Object Followup Reports"

PNV J18553862+1457343

PNV J18553862+1457343   2023 06 23.8855*  18 55 38.62 +14 57 34.3  13.2 U             Her       3 4

2023 06 23.8855

Discovered by the NMW survey (135mm f/2.0 telephoto lens + SBIG ST-8300M CCD; https://scan.sai.msu.ru/nmw/ ). Latest nondetection with the same camera: CV>14 on 2023-06-19.8157 UT. ---- Kirill Sokolovsky, Stanislav Korotkiy, Nikolay Potapov, Olga Smolyankina, Anna Prokudina, Sergei Ostapenko

2023 06 22.42826

There is a possible blue (g=22.2, r=21.9) counterpart Pan-STARRS DR1 125952839110901729 at 18:55:38.66 +14:57:33.8 J2000. ATLAS forced photometry at the Pan-STARRS position reveals a detection 1.45 days before the NMW discovery: 2023-06-20.46215 cyan non-detection 2023-06-22.42826 cyan=15.069 +/-0.007 2023-06-22.45976 cyan=14.813 +/-0.006 2023-06-22.46564 cyan=14.783 +/-0.005 ---- Kirill Sokolovsky

2023 06 23.999

Position end figures 38s.66, 33".8 measured with 0.50m reflector + CCD at Skygems Observatory, Namibia. J2000, Gaia DR2 positions. Position appears to correspond to a 22nd magnitude star measured in Pan-STARRS PS1 survey (Star ID 125952839110901729). Approximate unfiltered magnitude 13.4 using APASS V mag comparison stars. Andrew Pearce, Nedlands, Western Australia.

2023 06 24.0856

Photometry results were V=13.67 and Ic=13.53 with 0.32m reflector (F8.0) + QHY600M-PH CMOS camera (T18, iTelescope.NET) at Nerpio, Spain. Seiichiro Kiyota (Japan)

2023 06 24.877025

Xing Gao obtained the low-resolution spectrum using the Alpy 600 spectrograph attached to a 0.6-m f/8 Ritchey-Chretien telescope around 2023 Jun. 24.877025 UT, Jingyuan Zhao reduced these data.The spectrum show a blue mainly featureless spectrum with Halpha emission, We classify it as CV. The Spectrum data has been uploaded to TNS, and the spectrum image can be viewed here: https://www.wis-tns.org/system/files/uploaded/Pan-STARRS/tns_2023lmj_classrep_15107_Pan-STARRS.jpg .