A2RTRAW ivo://nasa.heasarc/a2rtraw NASA/GSFC HEASARC HEASARC 2026-04-10 NASA/GSFC HEASARC help desk heasarc-vo at athena.gsfc.nasa.gov Observation The A2 experiment was flown on the HEAO-1 satellite, between August, 1977 until January 1979. The experiment consisted of six multi-layer multi-anode collimated gas proportional counters. These were two LEDs (Low Energy Detectors), a MED (Medium Energy Detector), and three HEDs (High Energy Detectors). The first 6-months of mission were dedicated to an all-sky scan after which a pointing phase started. This database accesses the raw rate data obtained from the A2 MED (small and large field of view, FOV) and HEDs (1,2 and 3 small and large filed of view) detectors during the scanning and pointed phase. Note: This database does not contain coordinates. Since the satellite was mostly scanning, the XRATE database, from which the FITS files are generated, was organized in time. This is a service provided by NASA HEASARC . https://heasarc.gsfc.nasa.gov/W3Browse/all/a2rtraw.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=a2rtraw GET text/xml https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/w3query.pl?tablehead=name=heasarc_a2rtraw&Action=More+Options&Action=Parameter+Search&ConeAdd=1 HEAO1 0.0166666666666667 X-ray public a2rtraw HEAO 1 A2 Raw Rates filename Raw Date File Name meta.id;meta.main char nullable start_time Date and Time of First Data Record (MJD format) mjd time.start;obs double nullable int_time Integration Time s time.interval float nullable "__row" System index column char nullable detector Detectors (MED or all three HEDs) instr;instr.det char nullable stop_time Date and Time of Last Data Record (MJD format) mjd time.end;obs double nullable start_date Date and Time of First Data Record (DD/MM/YY HH:MM:SS) time.start;obs char nullable stop_date Date and Time of Last Data Record (DD/MM/YY HH:MM:SS) time.end;obs char nullable