This is the observation data obtained by the Large Area Counter (LAC) onboard Ginga satellite. It contains telemetry data (First Reduction File =FRF) and summary lists of the LAC housekeeping and attitude information (LACDUMP files). Each FRF is made per one satellite-operation pass (a contact or remote pass), while LACDUMP is per one day. These files are NOT divided at the times of maneuvers and therefore may contain data of previous and/or next targets as well as those during maneuvers. The recommended background data are simply selected from all the blank sky observations performed within 3 days. Before using them, however, users are strongly advised to check if they are really applicable for background subtraction in each case.

Data Analysis

Currently, users can carry out (1) spectral analysis and (2) timing analysis of LAC data from pointing-mode observations. Detailed analysis of LAC scan-mode data (such as fitting of the scan profile) is not supported at present.

Please see the Data Analysis page for details.