Images from the ISDC Newsletter
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This is an automaticly generated list of images included in the
ISDC Newsletter.
The images are given with their original caption and a link to the related
article in the Newsletter. You can search for a subset of images by selecting
only the images of a given Newsletter issue or by giving a single caption
keyword.
The figure on the right shows a BATSE all sky survey image, limited to >0.5 Crab sources,
derived from 50 days of data.
The flat fielding technique has improved the sensitivity (to
approaching the statistical limits) and the image quality, and
exciting new results are expected soon.
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The figure on the left clearly demonstrates
the ability to flat field the BATSE data.
The large temporal variations in the raw data are
greatly reduced (by ~90 %) once the model has been applied.
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The figure on the left shows the gamma-ray shadow of the discobol statuette. In a very emphatic way, the
discobol symbolizes the intense effort before launch and the light
announces the dawn of a prolific era for gamma-ray astronomers. One may
also see an allusion to the accretion discs powering compact sources.
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The image on the right is an optical picture of the 20 cm-high discobol statuette, which is a copy of the famous Discobol (disc thrower) sculpted by Myron (Greece, around 460-450 B.C.).
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The figure on the right shows the GGOD software flow diagram. GGOD uses the input radiation environment and the detailed geometry model to create a "virtual instrument".
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The figure on the right shows a projection of the background across the PICsIT detector plane.
The axes shown are in the Mass Model Co-ordinate system, where SPI is at negative X.
There is evidence of a gradual increase in background towards SPI, but there is also clear evidence of an increase in background at the detector module boundaries, caused by internal structural elements.
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The figure on the left shows a 1 keV binned spectrum of the SPI background.
The emission-line contamination due to the radioactive decays is clearly visible.
The exact identification of the lines is in progress, based on TGRS data.
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The figure on the left shows an exploded view of the SPI instrument. The complexity of TIMM arises due to the large number of different elements.
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