General information
SVOM sb26071506 was triggered by SVOM/ECLAIRs on 2026-07-15T16:23:04 UTC as an X-ray transient, with SVOM/MXT finding an X-ray source in the field. Later SVOM/VT observations confirmed the trigger was related to a stellar flare from the high-proper-motion star V* AT Mic.
Wavelength coverage
- X-ray: SVOM/ECLAIRs detected the event in the 5-20 keV band with image-trigger SNR 9.24, and SVOM/MXT observed the field 244 s after trigger, localizing an uncatalogued X-ray source.
- Optical: SVOM/VT observed in VT_B and VT_R starting 327 s after trigger and found fading of saturated V* AT Mic; MASTER-SAAO obtained clear-band upper limits reaching 18.1 mag.
Bands with no observations mentioned: radio, infrared, ultraviolet, gamma-ray beyond the reported ECLAIRs high-energy trigger, gravitational waves, neutrinos.
Lightcurve and spectrum
- ECLAIRs image trigger used a 327.68 s time window starting at 2026-07-15T16:18:58 UTC.
- SVOM/VT reported V* AT Mic decreased in brightness in both VT_B and VT_R.
- In VT_B, the source faded from ~10.9 mag to ~11.2 mag in about 1.4 hours.
- MASTER-SAAO reported clear-band upper limits of 14.7 mag at Tmid-T0 = 2949 s and 18.1 mag at Tmid-T0 = 5590 s.
Redshift
What’s special vs typical