INTErnational Gamma-Ray Astrophysics Laboratory (INTEGRAL)
Launch Date: July 15, 2009
Extended Mission Lifetime: 2023+ (Pending NASA Senior Review)
End of Operations: Reentry in 2029
Data Archive: ESA
INTEGRAL performs spectroscopy and imaging of gamma-ray sources. It is an ESA medium-sized mission with additional contributions from Italy, France, Germany, and Spain, and with Roscosmos and NASA as external partners. Gamma-ray bursts are distributed through the Integral Burst Alert System (IBAS).
| Instruments | Energy Range | Field of View | Localization |
|---|---|---|---|
| Imager on Board the INTEGRAL Satellite (IBIS) | 15 keV–10 MeV | 0.25 ster | ≤ 4′ radius (statistical, 90%) |
| SPectrometer on INTEGRAL AntiCoincidence Shield (SPI-ACS) | >75 keV | 4π ster |
GCN Notice Types in GCN Classic and GCN Classic Over Kafka: Detailed Descriptions and Examples
| Type | Contents | Latency |
|---|---|---|
INTEGRAL_WEAK | Low-significance events | ~1 minutes |
INTEGRAL_WAKEUP | First Notice with a position | ~1 minutes |
INTEGRAL_REFINED | Uses more data (if a long burst) | 1-2 minutes |
INTEGRAL_OFFLINE | Human-involved post-processing | 1–3 hours |
INTEGRAL_SPIACS | Timestamp only; no position information | ~1 minutes |
Common GCN Circular Types:
| Type | Latency | Example |
|---|---|---|
| Identification of a GRB | hours | GRB 220514A |
| Follow-up of a GW trigger | 1 hour | LIGO/Virgo S191213g |
Yearly Trigger Rates:
| Instrument | Type | Rates |
|---|---|---|
| IBIS | Gamma-ray burst | 5-10 |
| SPI-ACS | Gamma-ray burst | 100-120 |