Central Bureau for Astronomical Telegrams

CBAT "Transient Object Followup Reports"

TCP J19324367-2239307

TCP J19324367-2239307   2026 04 05.4395*  19 32 43.67 -22 39 30.7  13.6 U             Sgr       9 0

2026 04 05.4395

This is an apparent brightening of a previously constant star 2MASS J19324369-2239330 identified with the NMW-TexasTech transient survey (135mm telephoto lens + unfiltered QHY600M CMOS camera). On 2026-04-05.4395 UTC the object was detected at an unfiltered magnitude (V zero-point) of 13.6 +/-0.1, while in the reference image obtained on 2026-03-26.4668 it was observed at 15.2 +/-0.3. The plate-solved FITS images, finder charts and animations produced from the NMW images are available at http://tau.kirx.net/img/TCPJ19324367-2239307/ The ASAS-SN photometry https://asas-sn.osu.edu/sky-patrol/coordinate/ad8314ff-13cb-42c9-84e5-6bdb2acc870b confirms a gradual brightening from g=16.1 +/-0.2 on 2026-03-11.3448 to g=14.11 +/-0.04 on 2026-04-05.2937. No similar brightening events appear in the ASAS-SN lightcurve that starts in 2014. Spectroscopic observations are needed to identify the nature of this event. Improved astrometry should test whether the newly-brightened object actually coincides with 2MASS J19324369-2239330. The NMW-TexasTech survey operates at TTU Preston Gott Skyview Observatory (Shallowater, Texas). ----- Kirill Sokolovsky, Darien Perla, Vallia Antoniou, Elias Aydi (Texas Tech University)