A2LCPOINT ivo://nasa.heasarc/a2lcpoint NASA/GSFC HEASARC HEASARC 2026-06-12 NASA/GSFC HEASARC help desk heasarc-vo at athena.gsfc.nasa.gov Lightcurve The A2 experiment was flown on the HEAO-1 satellite, from 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 table accesses the lightcurves available at HEASARC obtained from the A2 MED (small and large field of view) and HEDs (3 units, each with small and large field of view) detectors during the pointed phase. This is a service provided by NASA HEASARC . https://heasarc.gsfc.nasa.gov/W3Browse/all/a2lcpoint.html Archive Research served-by HEASARC TAP https://heasarc.gsfc.nasa.gov/xamin/vo/cone?showoffsets&table=a2lcpoint& GET text/xml 180 99999 true 337.4094912 -77.9439694 1 https://heasarc.gsfc.nasa.gov/xamin/vo/tap https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/getvotable.pl?name=a2lcpoint GET text/xml https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/w3query.pl?tablehead=name=heasarc_a2lcpoint&Action=More+Options&Action=Parameter+Search&ConeAdd=1 HEAO1 1 X-ray public a2lcpoint HEAO 1 A2 Pointed Lightcurves name Source Designation meta.id;meta.main char nullable ra Right Ascension degree pos.eq.ra;meta.main double nullable dec Declination degree pos.eq.dec;meta.main double nullable meds_count_rate Medium Energy Detector Small FOV Count Rate ct/s double nullable meds_count_rate_error Medium Energy Detector Small FOV Count Rate Error ct/s double nullable start_date Date and Time of Observation Start (DD/MM/YY HH:MM:SS) time.start;obs char nullable stop_date Date and Time of Observation Stop (DD/MM/YY HH:MM:SS) time.end;obs char nullable meds_file MED SFOV File Name char nullable exposure Exposure Time (seconds) s time.duration;obs.exposure int nullable hd3s_file HED-3 SFOV File Name char nullable telapse Elapsed Time of the Observation (seconds) s time.duration;obs int nullable confused Is Another Source in the Field of View? (0 = No) int nullable "time" Date and Time of Observation Start (SHF format) mjd time.start;obs double nullable hd3s_count_rate_error High Energy Detector 3 Small FOV Count Rate Error ct/s double nullable hd3s_count_rate High Energy Detector 3 Small FOV Count Rate ct/s double nullable end_time Date and Time of Observation Stop (SHF format) mjd time.end;obs double nullable hd3l_file HED-3 LFOV File Name char nullable bii Galactic Latitude degree pos.galactic.lat double nullable lii Galactic Longitude degree pos.galactic.lon double nullable gif_file GIF File Name char nullable medl_file MED LFOV File Name char nullable quality Quality Flag (0=bad -> 10=good) 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