NDLI: Temporal x-ray astronomy with a pinhole camera. [cygnus and scorpius constellation

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Temporal x-ray astronomy with a pinhole camera. [cygnus and scorpius constellation

Content Provider	NASA Technical Reports Server (NTRS)
Author	Holt, S. S.
Copyright Year	1975
Description	Preliminary results from the Ariel-5 all-sky X-ray monitor are presented, along with sufficient experiment details to define the experiment sensitivity. Periodic modulation of the X-ray emission was investigated from three sources with which specific periods were associated, with the results that the 4.8 hour variation from Cyg X-3 was confirmed, a long-term average 5.6 day variation from Cyg X-1 was discovered, and no detectable 0.787 day modulation of Sco X-1 was observed. Consistency of the long-term Sco X-1 emission with a shot-noise model is discussed, wherein the source behavior is shown to be interpretable as approximately 100 flares per day, each with a duration of several hours. A sudden increase in the Cyg X-1 intensity by almost a factor of three on 22 April 1975 is reported, after 5 months of relative source constancy. The light curve of a bright nova-like transient source in Triangulum is presented, and compared with previously observed transient sources. Preliminary evidence for the existence of X-ray bursts with duration less than 1 hour is offered.
File Size	2055463
Page Count	42
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19750016524
Archival Resource Key	ark:/13960/t8kd6p652
Language	English
Publisher Date	1975-05-01
Access Restriction	Open
Subject Keyword	Astronomy Cygnus Constellation All Sky Photography Ariel Satellites Signal To Noise Ratios Scorpius Constellation Light Curve X Ray Astronomy X Ray Sources Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Technical Report

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