OSO8PHARAW ivo://nasa.heasarc/oso8pharaw NASA/GSFC HEASARC HEASARC 2026-10-09 NASA/GSFC HEASARC help desk heasarc-vo at athena.gsfc.nasa.gov Observation The Orbiting Solar Observatory-I (OSO-8) was launched on 21 June 1975 into a 550 km circular orbit at 33 degrees inclination. Data were obtained from the mission until late September 1978. The spacecraft structure consisted of a rotating cylindrical base section called the "wheel" and a non-spinning upper section called the "sail". While the primary objectives of the mission were solar in nature, there were 3 detectors, the GSFC Cosmic X-ray Spectroscopy experiments (GCXSE detectors A, B, and C), mounted in the rotating wheel which had exclusively non-solar objectives. Their fields-of-view were either aligned to the spin axis or at small angles to it, hence they always view the portion of the sky at right angles to the earth-sun line. This database accesses the pha FITS datafiles for the A, B, and C GCXSE detectors. Data was accumulated every quarter of a rotation period (~2.56 s) for the A detector and every 40.96 s for the B and C detectors in the 2-60 keV energy band. This is a service provided by NASA HEASARC . https://heasarc.gsfc.nasa.gov/W3Browse/all/oso8pharaw.html Archive Research served-by HEASARC TAP https://heasarc.gsfc.nasa.gov/xamin/vo/tap https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/getvotable.pl?name=oso8pharaw GET text/xml https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/w3query.pl?tablehead=name=heasarc_oso8pharaw&Action=More+Options&Action=Parameter+Search&ConeAdd=1 OSO8 0.0166666666666667 X-ray public oso8pharaw OSO8 GCXSE Raw PHA file_name ABC PHA Data Product File Name meta.id;meta.main char nullable start_date Start Date of Observation (DD/MM/YY HH:MM:SS) time.start;obs char nullable end_date End Date of Observation (DD/MM/YY HH:MM:SS) time.end;obs char nullable detector Name of the Detector Used instr;instr.det char nullable "__row" System index column char nullable num_rows Number of Rows in the FITS File meta.number int nullable end_time End Date of Observation mjd time.end;obs double nullable start_time Start Date of Observation mjd time.start;obs double nullable