JAXA's MAXI (Monitor of All-sky X-ray Image) is an International Space Station (ISS) based all-sky X-ray scanner, which consists of X-ray slit cameras with high sensitivity. It continuously monitors astronomical X-ray objects over a broad energy band (0.5 to 30 keV).
MAXI monitors the X-ray variability once every 96 minutes for more than 1,000 X-ray sources covering the entire sky on time scales from a day to a few months.
As an all-sky monitor, MAXI employs slit cameras. They determine one direction of X-ray sources within the narrow field of view of the slit that is orthogonally oriented to a one-dimensional position-sensitive X-ray detector. As an X-ray source moves according to the motion of the International Space Station, another position of the X-ray source is determined when the sources are captured by the collimated field of view of the camera.
The International Space Station orbits around the Earth every 96 minutes. During this time, Maxi’s two semicircular (arc-shaped) fields of view will scan the whole sky once.
MAXI employs two types of position-sensitive detectors, gas proportional counters and X-ray CCDs, aligned to two fields of views to observe both the zenith and horizontal directions.
|Type / Application:||Astronomy, X-ray|
|Configuration:||Attached ISS payload|
|Lifetime:||1 year (planned); 6 months reached|
|Orbit:||400 km × 400 km, 51.6° (typical)|
|MAXI||N/A||15.07.2009||CCK LC-39A||Shuttle||with Endeavour F23 (STS-127), JEF (JEM-EF), JLE (JEM-ELM-ES), SEDA-AP, ICS, ANDE-2 AA, ANDE-2 PA, Bevo 1, AggieSat2|