Gravitational Wave High-energy Electromagnetic Counterpart All-sky Monitor (GECAM)

Launch Date: December 9, 2020

End of Operations: No specific requirement

Data Archives: GCN Classic

GECAM is a constellation of two small X-ray and gamma-ray all-sky observatories. These two microsatellites, denoted as GECAM-A and GECAM-B, are designed to operate on opposite sides of the Earth. Each GECAM satellite features a dome-shaped array of 25 Gamma-ray detectors (GRD) and 8 Charged particle detectors (CPD). Each satellite can monitor the all-sky un-occulted by the Earth, thus two satellites together could watch the entire sky. Due to unexpected anomalies in power supply system, GECAM-A has not been able to observe yet, and GECAM-B can observe about 10 hours per day since January 14, 2021, and about 21 hours per day since May 30, 2022.

GCN Notice Types in GCN Classic and GCN Classic Over Kafka: Detailed Descriptions and Examples

Yearly Trigger Rates:

Real notices will have Trigger_Number values between 1 and 99999999. Test notices will have Trigger_Number values greater than or equal to 100000000.