239Alferov
About the mission
239Alferov is an educational 3U CubeSat mission. It was launched on 25 July 2025 from the Vostochny Cosmodrome into a Sun-synchronous orbit. The mission combines amateur radio and space research objectives.
The gamma-ray detector onboard 239Alferov contains a 64×72×15 mm NaI(Tl) scintillator, read out by a SiPM array, and covers the energy range from approximately 20 keV to 1000 keV.
Scientific observations began in December 2025. The instrument currently records count rates in five energy bands: approximately 20–50 keV, 50–100 keV, 100–500 keV, 500–1000 keV, and >1000 keV, with a temporal resolution of 0.5 s.
Sky surveys last for several days, with approximately day-long intervals between observing sessions for data analysis and technical maintenance.
The mission ground segment uses the open SONIKS ground station network.
Current detector operation time
During the interval 2025-12-02 — 2026-06-04:
23 days
List of detected bursts
| Name | Date and time | 239Alferov GCN | Other detections |
|---|---|---|---|
| GRB 251203A | 29925.150 s UT (08:18:45.150) |
-- | Fermi-GBM (GCN 42968),
AstroSat-CZTI (GCN 42991), SVOM-GRM (GCN 42995), GECAM-B (GCN 42996), Insight-HXMT/HE (GCN 43002) |
| GRB 260101A | 3390.650 s UT (00:56:30.650) |
43481 | Fermi-GBM (GCN 43284),
Swift-BAT (GCN 43285), SVOM-GRM (GCN 43292), GECAM-B (GCN 43294), Konus-Wind (GCN 43389) |
| GRB 260121A | 8549.319 s UT (02:22:29.319) |
43612 | IPN (GCN 43564),
Konus-Wind (GCN 43611) |
| GRB 260604A | 8667.541 s UT (02:24:27.541) |
45005 | Fermi-GBM (GCN 44812),
Glowbug (GCN 44845), SVOM-GRM (GCN 44863) |
| GRB 260604B | 31555.356 s UT (08:45:55.356) |
45006 | Fermi-GBM (GCN 44818),
SVOM-GRM (GCN 44850) |
The date and time correspond to the trigger times of near-Earth spacecraft; for GRB 260121A, the Konus-Wind trigger time is given.