OSO8ALC ivo://nasa.heasarc/oso8alc NASA/GSFC HEASARC HEASARC 2026-04-03 NASA/GSFC HEASARC help desk heasarc-vo at athena.gsfc.nasa.gov Lightcurve This database accesses the FITS lightcurves obtained from the A detector part of the GSFC Cosmic X-ray Spectroscopy experiment (GCXSE) on board OSO8. The Orbiting Solar Observatory-I (OSO-8) was launched on 21 June 1975 into a 550 km circular orbit at 33 degrees inclination. While the primary objectives of the mission were solar in nature, there were 3 detectors (the GCXSE detectors A, B and C) which had exclusively non-solar objectives. The energy band was 2-60 keV for the A and C detector and 2-20 keV for the B detector. The spacecraft structure consisted of a rotating cylindrical base section called the "wheel" and a non-spinning upper section called the "sail". The GCXSE detectors were mounted in the rotating wheel and their fields-of-view were either aligned to the spin axis (B and C) or at small angles to it (A), hence they always viewed the portion of the sky at right angles to the earth-sun line. The GCXSE detectors obtained data until late September 1978. This is a service provided by NASA HEASARC . https://heasarc.gsfc.nasa.gov/W3Browse/all/oso8alc.html Archive Research served-by HEASARC TAP https://heasarc.gsfc.nasa.gov/xamin/vo/cone?showoffsets&table=oso8alc& GET text/xml 180 99999 true 74.5720619 -75.2775922 1 https://heasarc.gsfc.nasa.gov/xamin/vo/tap https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/getvotable.pl?name=oso8alc GET text/xml https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/w3query.pl?tablehead=name=heasarc_oso8alc&Action=More+Options&Action=Parameter+Search&ConeAdd=1 OSO8 1 X-ray public oso8alc OSO8 A Detector Lightcurves name Object name meta.id;meta.main char nullable ra Right Ascension degree pos.eq.ra;meta.main double nullable bii Galactic Latitude degree pos.galactic.lat double nullable "__z_ra_dec" System unit vector column double nullable max_rate Lightcurve Maximum Count Rate ct/cm^2/s double nullable start_date Date and Time Observation Start DD/MM/YY HH:MM:SS char nullable "__y_ra_dec" System unit vector column double nullable "__row" System index column char nullable scatter_rate Lightcurve Standard Deviation ct/cm^2/s double nullable stop_time Date and Time Observation Stop mjd double nullable start_time Date and Time Observation Start mjd time.start;obs double nullable dec Declination degree pos.eq.dec;meta.main double nullable count_rate Lightcurve Mean Count Rate ct/cm^2/s phot.count;em.X-ray double nullable npoints Number of Points in the Lightcurve short nullable "__x_ra_dec" System unit vector column double nullable lii Galactic Longitude degree pos.galactic.lon double nullable filename FITS Lightcurve File Name char nullable stop_date Date and Time Observation Stop DD/MM/YY HH:MM:SS char nullable