Central Bureau for Astronomical Telegrams

CBAT "Transient Object Followup Reports"

TCP J18251276-2225293

TCP J18251276-2225293   2026 08 19.1062*  18 25 12.76 -22 25 29.3   9.4 U             Sgr       9 0

2026 08 19.1063

An optical transient found with the NMW-TexasTech survey (two identical Rokinon 135mm f/2.2 telephoto lenses + unfiltered QHY600PH-M CMOS cameras): 2026-08-18.1162 >14.7 2026-08-19.1063 9.4 2026-08-19.1067 9.4 2026-08-19.1174 9.5 2026-08-19.1212 9.3 The dates are UTC. The magnitude scale is calibrated to V magnitudes of Tycho-2 stars in the field. The discovery images and finder charts are available at http://tau.kirx.net/img/TCPJ18251276-2225293/ The NMW-TexasTech survey operates at TTU Preston Gott Skyview Observatory near Shallowater, Texas. ---- Katie Barnhart, Kirill Sokolovsky, Darien Perla, Pragati Acharya, John Worley, Vallia Antoniou, Elias Aydi (Texas Tech University)

2026 08 19.3750

I confirm there is an optical transient at the indicated position on 3 images taken with DSLR and 105 mm f/1.4 lens. V Magnitude 9.0 using UCAC4 reference stars. Images taken on 2026 08 19.3750 UT No object is visible at the location on 2026 08 18.375 UT using the same equipment to a limiting magnitude 12.5. John Seach, Grafton, NSW, Australia

2026 08 19.506

Position end figures 12s.76, 29.4" measured with 0.05m refractor + CMOS camera, J2000, Gaia DR2 positions. Gaia star 4090120793619793536 (G mag 19.5) is approximately 1.9" from measured position. Photometry - TB = 9.05, V = 8.73, TR = 8.41. Andrew Pearce, Nedlands, Western Australia

2026 08 19.4763

Follow-up photometry results were mag B = 9.48, V = 8.81, R = 8.34, I = 8.04. position end figures 12s.77, 29".2 using 0.30-m f/4.0 reflector + CMOS (P87). Pan-STARRS DR2 catalog appears to list a faint star of magnitude 20.5 or fainter at this celestial object's position, whereas Gaia DR3 does not. observed by K. Yoshimoto, Yamaguchi, Japan.

2026 08 19.76343

follow-up: CV=+8.7 mag, with, the NMW survey camera (135mm f/2.0 telephoto lens + unfiltered ST-8300M CCD). The NMW survey operates at the Astroverty astrofarm in Nizhnii Arkhyz, Karachay-Cherkessia, Russia ---- Stanislav Korotkiy (Astroverty, Ka-Dar), Kirill Sokolovsky (TexasTech) and Alexander Getmansky

2026 08 19.687

Position end figures 12s.77, 29.4" measured with 0.35m reflector + CCD at Perth Observatory, Bickley, Western Australia. Photometry - B = 9.25, V = 8.77, R = 8.33, I = 8.11. Andrew Pearce, Nedlands, Western Australia

2026 08 18.483

Object mag <13.0 TG on 18.483 Aug 2026 UT; mag 9.0 TG on 19.411 Aug 2026 UT. Canon 800D & 50mm lens, observer Rob Kaufman, Bright, Victoria, Australia.

2026 08 20.1430

Follow-up photometry with a 0.3-m telescope (+ QHY268M CMOS camera) located at the Preston F. Gott Skyview Observatory of Texas Tech University: 2026-08-20.1430 UTC B= 8.77 +/-0.01, V= 8.09 +/-0.04, I= 7.84 +/-0.01. The magnitude zero-points were calibrated to APASS stars in the field. ----- Kirill Sokolovsky, Katie Barnhart, Darien Perla, Pragati Acharya, John Worley, Vallia Antoniou, Elias Aydi (Texas Tech University)

2025 08 25.861

This transient was observed by Gianluca Masi, on Aug. 25.0861 2026, remotely using the 14" robotic unit part of the Virtual Telescope Project facility in Manciano, Italy. He took some low res spectra, with a scale of about 13.5 Angstrom/pixel and they show a very strong H-alpha emission, as well as an evident emision at the H-beta wavelength.

2026 08 25.861

Just to correct a typo in the previous comment: spectra were taken by G. Masi on Aug. 25.861 2026 UTC (there was zero which has to be removed).