MAXI team reported 0 detection of the transient events to Astronomer’s Telegram (ATEL) in April, 2010.
And MAXI team also reported one GRB event to GCN: The Gamma-ray bursts Coordinates Network.
MAXI is located in the front (moving direction of ISS ) in the normal attitude of ISS. When the space shuttle docks, ISS turns back and MAXI becomes in the back side. During this period, the Horizontal camera looks back instead of looking forward. The north camera looks south. On April 7,2010, ISS turned back for Space shuttle docking. The blank region of the north camera moved to the south, around the Galactic center.
The south camera (A camera 0) is operating in lower high voltage (1550V) to expand the life time. The high voltage of other two cameras (B camera 1 and B camera 2) were also reduced. The calibration of those cameras is undergoing and the data of those cameras are excluded in the MAXI home page now. The calibration time is estimated one or two weeks.
The all-sky image taken on April 8, 2010, after the ISS turn-back. The north camera covers the south region, making a blank near the galactic center.
MAXI/GSC detected a large X-ray flare from the RS CVn II Peg. The peak flux was obtained at the scan at 03:58 on Apr 5th, 2010 (UT), and is about 70 mCrab, which is one of the brightest X-ray flare from this category.
The bottom figure shows a spectrum obtained with GSC at the brightest scan. The spectral shape is resemble to that in another large flare from this source which was observed with Swift at 11:21:52 on 2005 Dec 16 (UT).
Two GSC cameras (A-camera 0 and 3) are currently not operated since March 29, 2010. These are the north cameras and the north part (50 degree in radius) in the all-sky map is blank now. MAXI still covers 80 % of the sky. The blank region moves around the celestial north-pole with the 60-day orbital presession.
All-sky image on 2010 March 30.