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All-Sky Monitor

NSSDCA ID: 1974-077A-06

Mission Name: Ariel 5
Principal Investigator:Dr. Stephen S. Holt


The purpose of this experiment was to monitor the entire sky continuously for transient X-ray phenomena and, at the same time, to monitor all the strong X-ray sources in the sky for long-term temporal effects. The experiment utilized two X-ray pin-hole cameras to image the sky. Position-sensitive proportional counters recorded the photons imaged through the pinholes. The fan beam response of the cameras allowed the whole sky to be monitored at least once per spacecraft rotation. The energy window was 3-6 keV. It was a valuable aid in programming satellite maneuvers so that transient events in the X-ray sky, such as nearby novae and X-ray flares, could be rapidly made available for study with greater resolution by the other experiments and other spacecraft.

Alternate Names

  • Ariel5/All-SkyMonitor

Funding Agency

  • NASA-Office of Space Science (United States)


    Additional Information

    Questions and comments about this experiment can be directed to: Coordinated Request and User Support Office



    NameRoleOriginal AffiliationE-mail
    Dr. Elihu A. BoldtOther InvestigatorNASA Goddard Space Flight
    Dr. Peter J. SerlemitsosOther InvestigatorNASA Goddard Space Flight
    Dr. Stephen S. HoltPrincipal InvestigatorNASA Goddard Space Flight
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