GINGA ivo://nasa.heasarc/gingalog NASA/GSFC HEASARC ISAS; HEASARC 2026-04-10 NASA/GSFC HEASARC help desk heasarc-vo at athena.gsfc.nasa.gov Observation The GINGALOG database table contains selected information from the Large Area Counter (LAC) aboard the third Japanese X-ray astronomy satellite Ginga. The Ginga experiment began on day 36, 5 February 1987 and ended in November 1991. Ginga consisted of the LAC, the all-sky monitor (ASM) and the gamma-ray burst detector (GBD). The satellite was in a circular orbit at 31 degree inclination with apogee 670 km and perigee 510 km, and with a period of 96 minutes. A Ginga observation consisted of varying numbers of major frames which had lengths of 4, 32, or 128 seconds, depending on the setting of the bitrate. Each GINGALOG database entry is the first record of a series of observations having the same values of "ACS MONITOR" (Attitude Control System). When this value changes, a new FITS file was written. The other Ginga catalog database, GINGAMODE is also a subset of the same LAC dump file used to create GINGALOG. GINGAMODE contains a listing whenever any of the following changes: "BITRATE", "LACMODE", "DISCRIMINATOR", or "ACS MONITOR". Thus, GINGAMODE monitors changes in several parameters and GINGALOG is a basic log of all the FITS files. Both databases point to the corresponding archived Flexible Image Transport System (FITS) files, but GINGAMODE may have more than one entry for a given FILE_LCURVE in the database. The user is invited to browse though the observations available from Ginga using GINGALOG or GINGAMODE, then extract the FITS files for more detailed analysis. The Ginga LAC Log Catalog was prepared from data sent to NASA/GSFC from the Institute of Space and Astronautical Science (ISAS) in Japan. This is a service provided by NASA HEASARC . https://heasarc.gsfc.nasa.gov/W3Browse/all/gingalog.html Archive Research served-by HEASARC TAP https://heasarc.gsfc.nasa.gov/xamin/vo/cone?showoffsets&table=gingalog& GET text/xml 180 99999 true 84.14 -72.55 1 https://heasarc.gsfc.nasa.gov/xamin/vo/tap https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/getvotable.pl?name=gingalog GET text/xml https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/w3query.pl?tablehead=name=heasarc_gingalog&Action=More+Options&Action=Parameter+Search&ConeAdd=1 GINGA 1 X-ray public gingalog Ginga LAC Log bii Galactic Latitude degree pos.galactic.lat double nullable telapse Length of This Observation (seconds) s time.duration;obs double nullable ra Right Ascension degree pos.eq.ra;meta.main double nullable "time" Observation Start Time mjd time.start;obs double nullable lii Galactic Longitude degree pos.galactic.lon double nullable file_lcurve FITS File Name meta.dataset;meta.file;phot char nullable "__y_ra_dec" System unit vector column double nullable exposure Time on Source (seconds) s time.duration;obs.exposure double nullable "__x_ra_dec" System unit vector column double nullable "__z_ra_dec" System unit vector column double nullable end_time Observation Stop Time mjd time.end;obs double nullable acs_monitor Attitude Control System Monitor instr.setup char nullable "__row" System index column char nullable dec Declination degree pos.eq.dec;meta.main double nullable name Target Designation meta.id;meta.main char nullable