ISO ivo://nasa.heasarc/isolog NASA/GSFC HEASARC ISO Data Center 2026-10-09 NASA/GSFC HEASARC help desk heasarc-vo at athena.gsfc.nasa.gov Observation This database is the ISO (Infrared Space Observatory) Observation Log of Validated Data. ISO is an ESA (European Space Agency) project with instruments funded by ESA member states (especially the PI countries of France, Germany, the Netherlands and the United Kingdom), and with the participation of ISAS (Japan) and NASA (USA). ISO operated from November 1995 till May 1998, almost a year longer than expected. As an unprecedented observatory for infrared astronomy, able to examine the cool and hidden places in the Universe, ISO successfully made nearly 30,000 scientific observations. The ISO data can be retrieved from the ISO Data Archive (<a href="http://iso.esac.esa.int/ida/">http://iso.esac.esa.int/ida/</a>), which is available at the ISO Data Centre (<a href="http://iso.esac.esa.int/">http://iso.esac.esa.int/</a>), and comprises about 150,000 observations, including calibration, parallel mode and serendipitous observations. The present catalog contains all observations performed in standard observing modes exempt from technical problems; special flags indicate calibration observations. The catalog gives observation details and provides links to quick-look images depicting the data and to observation-specific documentation. This online catalog was last updated by the HEASARC in September 2004 based on the machine-readable table <a href="https://cdsarc.cds.unistra.fr/ftp/cats/VI/111/isolog.dat.gz">https://cdsarc.cds.unistra.fr/ftp/cats/VI/111/isolog.dat.gz</a> obtained from the CDS data center. This is a service provided by NASA HEASARC . https://heasarc.gsfc.nasa.gov/W3Browse/all/isolog.html Archive Research served-by HEASARC TAP https://heasarc.gsfc.nasa.gov/xamin/vo/cone?showoffsets&table=isolog& GET text/xml 180 99999 true 134.1735 -85.6631 0.0833333333333333 https://heasarc.gsfc.nasa.gov/xamin/vo/tap https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/getvotable.pl?name=isolog GET text/xml https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/w3query.pl?tablehead=name=heasarc_isolog&Action=More+Options&Action=Parameter+Search&ConeAdd=1 ISO 0.0833333333333333 Infrared public isolog ISO (Infrared Space Observatory) Observation Log name Target Designation (As Given by the Observer) and Possibly Some Comments meta.id;meta.main char nullable tdt Number That Identifies an ISO Observation meta.id;obs int nullable ra Right Ascension degree pos.eq.ra;meta.main double nullable dec Declination degree pos.eq.dec;meta.main double nullable fov Maximum Field of View of the Observation instr.param;instr.fov char nullable "time" Start of Observation (UTC) mjd time.start;obs double nullable duration Duration of Observation (s) s time.duration;obs int nullable "__x_ra_dec" System unit vector column double nullable "__y_ra_dec" System unit vector column double nullable "__z_ra_dec" System unit vector column double nullable "__row" System index column char nullable bii Galactic Latitude degree pos.galactic.lat double nullable max_wavelength Longest Wavelength (um) microm em.wl;stat.max double nullable min_wavelength Shortest Wavelength (um) microm em.wl;stat.min double nullable abstract_flag Flag Indicates Abstract Available: Y/N meta.code char nullable observer_id Observer Identification of the Proposal meta.id.PI char nullable lii Galactic Longitude degree pos.galactic.lon double nullable calibration_flag Flag Indicates Calibration Observation: Y/N meta.code;instr.calib char nullable instrument_mode Astronomical Observing Template: Instrument and Observing Modes instr.setup char nullable proposal_id Proposal Designation meta.number;obs.proposal char nullable