October 1999 from the BeppoSAX Calendar
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These BeppoSAX MECS images and the plot to the right show the luminosity evolution of the Soft X-ray Transient Aql X-1, a binary system including a neutron star and a "normal" K star. The detection of Aql X-1 in outburst by the RXTE satellite (green points) triggered a series of BeppoSAX observations (red points) which allowed the investigators for the first time to follow the X-ray emission evolution down to a quiescence phase. Courtesy of S. Campana, Brera Observatory, Milano-Merate
1999 BeppoSAX Calendar
Images courtesy of the Agenzia Spaziale Italiana (ASI) and the BeppoSAX Science Data Center (SDC).
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