General information
AT2026fpm is reported as an optical transient candidate (MASTER OT J114437.99-023613.5) found by MASTER-OAFA in response to the IceCube Alert-260315A, stated to be very close to the neutrino errorbox center.
Wavelength coverage
- Neutrino: IceCube Alert-260315A reported.
- Optical: MASTER-OAFA CLEAR-band detection and limits reported.
No observations were mentioned in radio, IR, UV, X-rays, or gamma-rays.
Lightcurve and spectrum
- 2026-03-15 02:22:50 UT: MASTER-OAFA reports an upper limit up to 20.4 mag.
- 2026-03-15.10943 UT: CLEAR = 19.2 mag (mlim = 20.0), detected in 44 images.
- Reference image (2026-02-12.28608 UT): limiting magnitude mlim = 19.9 (unfiltered/reference stated).
Redshift
What’s special vs typical
- A prompt optical transient candidate was identified within minutes of the IceCube alert and is described as very close to the center of the neutrino localization, with repeated detections (44 images) and no minor-planet association reported.